From 3db586cd602195762b39d4f386e0808e1937c954 Mon Sep 17 00:00:00 2001
From: GinHa <15201596918@163.com>
Date: Thu, 16 Jul 2026 15:02:03 +0800
Subject: [PATCH] =?UTF-8?q?=E8=B6=85=E5=88=86=E5=8A=9F=E8=83=BD=E5=AE=8C?=
 =?UTF-8?q?=E6=88=90?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 video-gen-admin/src/App.tsx                   |    2 +
 video-gen-admin/src/api/index.ts              |   13 +
 .../src/pages/AdminVideoUpscale.tsx           |  262 +++
 video-gen-admin/src/types/index.ts            |   45 +
 video-gen-api/.env                            |    1 +
 ...3f47680a71d0_add_video_upscale_pipeline.py |  180 +++
 video-gen-api/app/api/admin/__init__.py       |    2 +
 video-gen-api/app/api/admin/video_upscale.py  |   53 +
 video-gen-api/app/api/v1/admin.py             |   33 +-
 video-gen-api/app/api/v1/generation.py        |  162 +-
 video-gen-api/app/api/v1/generation_ai.py     |   14 +
 video-gen-api/app/api/v1/projects.py          |    5 +
 video-gen-api/app/cmd/retry_video_upscale.py  |  188 +++
 video-gen-api/app/config.py                   |   22 +
 video-gen-api/app/enums/celery_queue.py       |    8 +
 video-gen-api/app/enums/generation_status.py  |   19 +
 video-gen-api/app/enums/generation_task.py    |   21 +
 video-gen-api/app/enums/video_upscale.py      |   97 ++
 video-gen-api/app/models/__init__.py          |    3 +-
 .../app/models/chat_generation_task.py        |    5 +-
 video-gen-api/app/models/generation_record.py |    8 +-
 .../app/models/video_upscale_task.py          |   85 +
 video-gen-api/app/schemas/generation.py       |    2 +
 video-gen-api/app/schemas/video_upscale.py    |   59 +
 .../generation/ai/task_create_service.py      |   20 +
 .../generation/ai/task_group_service.py       |   25 +-
 .../services/generation/download_service.py   |   40 +
 .../generation/history_delete_service.py      |    8 +
 .../services/generation/recovery_service.py   |    6 +
 .../generation/task_factory_service.py        |   12 +
 .../module_generation_flow_base_service.py    |    6 +
 video-gen-api/app/services/video_gen.py       |    2 +-
 video-gen-api/app/services/video_queue.py     |  294 ++--
 .../app/services/video_upscale/__init__.py    |    0
 .../services/video_upscale/config_service.py  |  175 ++
 .../services/video_upscale/guard_service.py   |   61 +
 .../video_upscale/local_ffmpeg_service.py     |  128 ++
 .../app/services/video_upscale/log_service.py |  108 ++
 .../services/video_upscale/media_service.py   |  207 +++
 .../services/video_upscale/owner_service.py   |  120 ++
 .../video_upscale/snapshot_service.py         |  176 ++
 .../services/video_upscale/task_service.py    | 1431 +++++++++++++++++
 .../services/video_upscale/volc_service.py    |  270 ++++
 video-gen-api/app/tasks/celery_app.py         |   41 +-
 .../app/tasks/generation_create_tasks.py      |    2 +-
 .../app/tasks/generation_download_tasks.py    |   44 +-
 .../app/tasks/generation_recovery_tasks.py    |   15 +
 .../app/tasks/video_upscale_tasks.py          |  109 ++
 .../app/types/generation/provider.py          |    1 +
 49 files changed, 4423 insertions(+), 167 deletions(-)
 create mode 100644 video-gen-admin/src/pages/AdminVideoUpscale.tsx
 create mode 100644 video-gen-api/alembic/versions/3f47680a71d0_add_video_upscale_pipeline.py
 create mode 100644 video-gen-api/app/api/admin/video_upscale.py
 create mode 100644 video-gen-api/app/cmd/retry_video_upscale.py
 create mode 100644 video-gen-api/app/enums/video_upscale.py
 create mode 100644 video-gen-api/app/models/video_upscale_task.py
 create mode 100644 video-gen-api/app/schemas/video_upscale.py
 create mode 100644 video-gen-api/app/services/video_upscale/__init__.py
 create mode 100644 video-gen-api/app/services/video_upscale/config_service.py
 create mode 100644 video-gen-api/app/services/video_upscale/guard_service.py
 create mode 100644 video-gen-api/app/services/video_upscale/local_ffmpeg_service.py
 create mode 100644 video-gen-api/app/services/video_upscale/log_service.py
 create mode 100644 video-gen-api/app/services/video_upscale/media_service.py
 create mode 100644 video-gen-api/app/services/video_upscale/owner_service.py
 create mode 100644 video-gen-api/app/services/video_upscale/snapshot_service.py
 create mode 100644 video-gen-api/app/services/video_upscale/task_service.py
 create mode 100644 video-gen-api/app/services/video_upscale/volc_service.py
 create mode 100644 video-gen-api/app/tasks/video_upscale_tasks.py

diff --git a/video-gen-admin/src/App.tsx b/video-gen-admin/src/App.tsx
index 92eaf1d6..0d785256 100644
--- a/video-gen-admin/src/App.tsx
+++ b/video-gen-admin/src/App.tsx
@@ -32,6 +32,7 @@ import AdminShotReplications from './pages/AdminShotReplications';
 import AdminShotTaskSetDetail from './pages/AdminShotTaskSetDetail';
 import AdminReplicationProjectDetail from './pages/AdminReplicationProjectDetail';
 import AdminVideoPromptSchemaConfig from './pages/AdminVideoPromptSchemaConfig';
+import AdminVideoUpscale from './pages/AdminVideoUpscale';
 import AdminContactRequests from './pages/AdminContactRequests';
 import AdminHomeMaterials from './pages/AdminHomeMaterials';
 import AdminPreTestTemplates from './pages/AdminPreTestTemplates';
@@ -98,6 +99,7 @@ const App = () => {
               <Route path="payment-stats" element={<AdminPaymentStats />} />
               <Route path="settings" element={<AdminSettings />} />
               <Route path="video-prompt-schema-config" element={<AdminVideoPromptSchemaConfig />} />
+              <Route path="video-upscale" element={<AdminVideoUpscale />} />
               <Route path="notifications" element={<AdminNotificationManager />} />
               <Route path="oauthapp-list" element={<AdminOauthAppList />} />
               <Route path="operation-logs" element={<AdminOperationLogs />} />
diff --git a/video-gen-admin/src/api/index.ts b/video-gen-admin/src/api/index.ts
index d9a02ed8..9e760f29 100644
--- a/video-gen-admin/src/api/index.ts
+++ b/video-gen-admin/src/api/index.ts
@@ -17,6 +17,7 @@ import type {
   AdminTeam, AdminTeamListResponse, AdminTeamOption, AdminTeamPayload, AdminTeamQueryParams,
   PrivatePortraitConfig, PrivatePortraitProjectListOut, PrivatePortraitAssetListOut,
   AdminUploadFileResult, AdminUploadResourceType, AdminUploadScene,
+  VideoUpscaleConfigOut, VideoUpscaleConfigSavePayload,
 } from '../types';
 
 import type {
@@ -41,6 +42,18 @@ import type {
   HomeMaterialWatermarkQueryParams,
 } from '../types';
 
+
+// ── Video Upscale ────────────────────────────────────────
+
+export async function getVideoUpscaleConfig(): Promise<VideoUpscaleConfigOut> {
+  return api.get<VideoUpscaleConfigOut>('/admin/video-upscale/config');
+}
+
+export async function saveVideoUpscaleConfig(payload: VideoUpscaleConfigSavePayload): Promise<VideoUpscaleConfigOut> {
+  return api.put<VideoUpscaleConfigOut>('/admin/video-upscale/config', payload);
+}
+
+
 // ── Auth ──────────────────────────────────────────────────
 
 export async function login(username: string, password: string, captchaToken?: string, rememberMe?: boolean): Promise<User> {
diff --git a/video-gen-admin/src/pages/AdminVideoUpscale.tsx b/video-gen-admin/src/pages/AdminVideoUpscale.tsx
new file mode 100644
index 00000000..66bde398
--- /dev/null
+++ b/video-gen-admin/src/pages/AdminVideoUpscale.tsx
@@ -0,0 +1,262 @@
+import React, { useCallback, useEffect, useState } from 'react';
+import {
+  App,
+  Button,
+  Card,
+  Col,
+  Empty,
+  Row,
+  Select,
+  Space,
+  Spin,
+  Switch,
+  Tag,
+  Typography,
+} from 'antd';
+import { DeleteOutlined, PlusOutlined, ReloadOutlined, SaveOutlined } from '@ant-design/icons';
+
+import { getVideoUpscaleConfig, saveVideoUpscaleConfig } from '../api';
+import type {
+  VideoUpscaleConfigData,
+  VideoUpscaleProcessorKey,
+  VideoUpscaleResolutionRule,
+} from '../types';
+
+const { Title, Text, Paragraph } = Typography;
+
+const PROCESSORS: Array<{ key: VideoUpscaleProcessorKey; label: string }> = [
+  { key: 'local_ffmpeg_crop_v1', label: '本地 FFmpeg（crop）' },
+  { key: 'volc_standard_v1', label: '火山画质增强（标准版）' },
+  { key: 'volc_professional_v1', label: '火山画质增强（专业版）' },
+  { key: 'volc_large_model_v1', label: '火山画质增强（大模型）' },
+];
+
+const RESOLUTION_OPTIONS = ['480p', '720p', '1080p', '2K', '4K'].map((value) => ({
+  label: value,
+  value,
+}));
+
+const defaultRule = (): VideoUpscaleResolutionRule => ({
+  targetResolution: '1080p',
+  providerGenerationResolution: '720p',
+  processorKey: 'local_ffmpeg_crop_v1',
+  enabled: true,
+});
+
+function normalizeConfig(data: VideoUpscaleConfigData): VideoUpscaleConfigData {
+  return {
+    enabled: !!data.enabled,
+    version: Number(data.version || 1),
+    deleteSourceAfterSuccess: data.deleteSourceAfterSuccess !== false,
+    rules: Array.isArray(data.rules) ? data.rules.map((rule) => ({ ...rule })) : [],
+  };
+}
+
+function toSavePayload(data: VideoUpscaleConfigData) {
+  return {
+    data: {
+      enabled: data.enabled,
+      version: data.version,
+      delete_source_after_success: data.deleteSourceAfterSuccess,
+      rules: data.rules.map((rule) => ({
+        target_resolution: rule.targetResolution,
+        provider_generation_resolution: rule.providerGenerationResolution,
+        processor_key: rule.processorKey,
+        enabled: rule.enabled,
+      })),
+    },
+  };
+}
+
+const AdminVideoUpscale: React.FC = () => {
+  const { message, modal } = App.useApp();
+  const [loading, setLoading] = useState(true);
+  const [saving, setSaving] = useState(false);
+  const [config, setConfig] = useState<VideoUpscaleConfigData | null>(null);
+
+  const load = useCallback(async () => {
+    setLoading(true);
+    try {
+      const result = await getVideoUpscaleConfig();
+      setConfig(normalizeConfig(result.data));
+    } catch (error) {
+      message.error(error instanceof Error ? error.message : '读取视频超分配置失败');
+    } finally {
+      setLoading(false);
+    }
+  }, [message]);
+
+  useEffect(() => {
+    void load();
+  }, [load]);
+
+  const updateRule = (index: number, patch: Partial<VideoUpscaleResolutionRule>) => {
+    setConfig((current) => {
+      if (!current) return current;
+      return {
+        ...current,
+        rules: current.rules.map((item, itemIndex) => itemIndex === index ? { ...item, ...patch } : item),
+      };
+    });
+  };
+
+  const removeRule = (index: number) => {
+    setConfig((current) => current ? {
+      ...current,
+      rules: current.rules.filter((_, itemIndex) => itemIndex !== index),
+    } : current);
+  };
+
+  const addRule = () => {
+    setConfig((current) => current ? { ...current, rules: [...current.rules, defaultRule()] } : current);
+  };
+
+  const save = async () => {
+    if (!config) return;
+    const targets = config.rules
+      .filter((item) => item.enabled)
+      .map((item) => item.targetResolution.trim().toLowerCase());
+    if (new Set(targets).size !== targets.length) {
+      message.error('同一个客户目标分辨率只能存在一条启用规则');
+      return;
+    }
+
+    setSaving(true);
+    try {
+      const result = await saveVideoUpscaleConfig(toSavePayload(config));
+      setConfig(normalizeConfig(result.data));
+      message.success(`视频超分配置已保存，版本 ${result.data.version}`);
+    } catch (error) {
+      message.error(error instanceof Error ? error.message : '保存失败');
+    } finally {
+      setSaving(false);
+    }
+  };
+
+  if (loading || !config) {
+    return (
+      <div style={{ minHeight: 360, display: 'flex', alignItems: 'center', justifyContent: 'center' }}>
+        <Spin size="large" />
+      </div>
+    );
+  }
+
+  return (
+    <Space direction="vertical" size={16} style={{ width: '100%' }}>
+      <Card>
+        <Row justify="space-between" align="middle" gutter={[16, 16]}>
+          <Col>
+            <Title level={3} style={{ margin: 0 }}>视频超分配置</Title>
+            <Paragraph type="secondary" style={{ margin: '8px 0 0' }}>
+              规则只按客户选择的目标分辨率匹配。视频比例和最终像素由客户任务参数在创建任务时自动计算并固化快照。
+            </Paragraph>
+          </Col>
+          <Col>
+            <Space>
+              <Tag>配置版本 {config.version}</Tag>
+              <Button icon={<ReloadOutlined />} onClick={() => void load()}>重新加载</Button>
+              <Button type="primary" icon={<SaveOutlined />} loading={saving} onClick={() => void save()}>
+                保存配置
+              </Button>
+            </Space>
+          </Col>
+        </Row>
+
+        <Space direction="vertical" size={14} style={{ marginTop: 20 }}>
+          <Space>
+            <Text strong>全局开启超分</Text>
+            <Switch
+              checked={config.enabled}
+              onChange={(enabled) => setConfig({ ...config, enabled })}
+            />
+            <Text type="secondary">关闭后新任务走原流程，已经创建的任务仍按自身快照执行。</Text>
+          </Space>
+          <Space>
+            <Text strong>超分成功后删除源视频</Text>
+            <Switch
+              checked={config.deleteSourceAfterSuccess}
+              onChange={(deleteSourceAfterSuccess) => setConfig({ ...config, deleteSourceAfterSuccess })}
+            />
+            <Text type="secondary">
+              默认开启。关闭仅用于调试，会保留超分前源视频并持续占用服务器磁盘；超分失败时始终保留源视频。
+            </Text>
+          </Space>
+        </Space>
+      </Card>
+
+      <Card
+        title="目标分辨率规则"
+        extra={<Button icon={<PlusOutlined />} onClick={addRule}>新增规则</Button>}
+      >
+        {config.rules.length === 0 ? (
+          <Empty description="暂无规则；未匹配规则的视频任务继续走原流程" />
+        ) : (
+          <Space direction="vertical" size={12} style={{ width: '100%' }}>
+            {config.rules.map((rule, index) => {
+              const duplicate = rule.enabled && config.rules.filter(
+                (item) => item.enabled && item.targetResolution.toLowerCase() === rule.targetResolution.toLowerCase(),
+              ).length > 1;
+              return (
+                <Card key={`${index}-${rule.targetResolution}`} size="small">
+                  <Row gutter={[12, 12]} align="bottom">
+                    <Col xs={24} md={5}>
+                      <Text type="secondary">客户选择分辨率</Text>
+                      <Select
+                        value={rule.targetResolution}
+                        options={RESOLUTION_OPTIONS}
+                        style={{ width: '100%', marginTop: 4 }}
+                        onChange={(value) => updateRule(index, { targetResolution: value })}
+                        status={duplicate ? 'error' : undefined}
+                      />
+                    </Col>
+                    <Col xs={24} md={5}>
+                      <Text type="secondary">实际生成分辨率</Text>
+                      <Select
+                        value={rule.providerGenerationResolution}
+                        options={RESOLUTION_OPTIONS}
+                        style={{ width: '100%', marginTop: 4 }}
+                        onChange={(value) => updateRule(index, { providerGenerationResolution: value })}
+                      />
+                    </Col>
+                    <Col xs={24} md={7}>
+                      <Text type="secondary">处理方式</Text>
+                      <Select
+                        value={rule.processorKey}
+                        options={PROCESSORS.map((item) => ({ value: item.key, label: item.label }))}
+                        style={{ width: '100%', marginTop: 4 }}
+                        onChange={(value) => updateRule(index, { processorKey: value })}
+                      />
+                    </Col>
+                    <Col xs={12} md={2}>
+                      <Text type="secondary">启用</Text>
+                      <div style={{ marginTop: 8 }}>
+                        <Switch checked={rule.enabled} onChange={(enabled) => updateRule(index, { enabled })} />
+                      </div>
+                    </Col>
+                    <Col xs={12} md={2}>
+                      <Button
+                        danger
+                        icon={<DeleteOutlined />}
+                        onClick={() => modal.confirm({
+                          title: '删除这条超分规则？',
+                          onOk: () => removeRule(index),
+                        })}
+                      />
+                    </Col>
+                    <Col span={24}>
+                      <Text type="secondary">
+                        客户选择该目标分辨率时，无论横屏、竖屏或方形比例，都按本规则选择的实际分辨率生成；最终像素由任务比例自动计算。
+                      </Text>
+                    </Col>
+                  </Row>
+                </Card>
+              );
+            })}
+          </Space>
+        )}
+      </Card>
+    </Space>
+  );
+};
+
+export default AdminVideoUpscale;
diff --git a/video-gen-admin/src/types/index.ts b/video-gen-admin/src/types/index.ts
index ca6158dd..20648a60 100644
--- a/video-gen-admin/src/types/index.ts
+++ b/video-gen-admin/src/types/index.ts
@@ -1308,3 +1308,48 @@ export interface PrivatePortraitSelectableAssetListOut {
   page: number;
   pageSize: number;
 }
+
+// ── Video Upscale ────────────────────────────────────────
+
+export type VideoUpscaleProcessorKey =
+  | 'local_ffmpeg_crop_v1'
+  | 'volc_large_model_v1'
+  | 'volc_standard_v1'
+  | 'volc_professional_v1';
+
+export interface VideoUpscaleResolutionRule {
+  targetResolution: '480p' | '720p' | '1080p' | '2K' | '4K';
+  providerGenerationResolution: '480p' | '720p' | '1080p' | '2K' | '4K';
+  processorKey: VideoUpscaleProcessorKey;
+  enabled: boolean;
+}
+
+export interface VideoUpscaleConfigData {
+  enabled: boolean;
+  version: number;
+  deleteSourceAfterSuccess: boolean;
+  rules: VideoUpscaleResolutionRule[];
+}
+
+export interface VideoUpscaleConfigOut {
+  id?: string | null;
+  key: string;
+  description?: string | null;
+  data: VideoUpscaleConfigData;
+  createdAt?: string | null;
+  updatedAt?: string | null;
+}
+
+export interface VideoUpscaleConfigSavePayload {
+  data: {
+    enabled: boolean;
+    version: number;
+    delete_source_after_success: boolean;
+    rules: Array<{
+      target_resolution: string;
+      provider_generation_resolution: string;
+      processor_key: VideoUpscaleProcessorKey;
+      enabled: boolean;
+    }>;
+  };
+}
diff --git a/video-gen-api/.env b/video-gen-api/.env
index 52bd0930..cc011046 100644
--- a/video-gen-api/.env
+++ b/video-gen-api/.env
@@ -58,6 +58,7 @@ VIDEO_COVER_TIMEOUT_SECONDS=15
 VIDEO_COVER_FORMAT=png
 
 # VOLC
+VOLC_API_KEY=AKLTOWMwMjVhNzg0OGE2NDMwZWJkYWIyNzM3ZmMxMjc5NTQ
 VOLC_ACCESS_KEY_ID=AKLTYWY5Yjc5YjM3N2IwNDc3M2I3NTU2YjlmNTczYzQzMmM
 VOLC_SECRET_ACCESS_KEY=TXpjM01HUTFZMlV5TUdKbE5Ea3lNRGhqTUdSak16UTFOV0ptTW1SaE5XRQ==
 
diff --git a/video-gen-api/alembic/versions/3f47680a71d0_add_video_upscale_pipeline.py b/video-gen-api/alembic/versions/3f47680a71d0_add_video_upscale_pipeline.py
new file mode 100644
index 00000000..ac762f03
--- /dev/null
+++ b/video-gen-api/alembic/versions/3f47680a71d0_add_video_upscale_pipeline.py
@@ -0,0 +1,180 @@
+"""add video upscale pipeline
+
+Revision ID: 3f47680a71d0
+Revises: abae3e1c70f7
+Create Date: 2026-07-16 11:08:16.449960
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision: str = "3f47680a71d0"
+down_revision: Union[str, None] = "abae3e1c70f7"
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    op.add_column(
+        "chat_generation_tasks",
+        sa.Column("provider_generation_resolution", sa.String(length=16), nullable=True),
+    )
+    op.add_column(
+        "chat_generation_tasks",
+        sa.Column(
+            "video_upscale_enabled_snapshot",
+            sa.Boolean(),
+            server_default=sa.text("false"),
+            nullable=False,
+        ),
+    )
+    op.add_column(
+        "chat_generation_tasks",
+        sa.Column("video_upscale_snapshot_json", sa.Text(), nullable=True),
+    )
+
+    op.add_column(
+        "generation_records",
+        sa.Column("provider_generation_resolution", sa.String(length=16), nullable=True),
+    )
+    op.add_column(
+        "generation_records",
+        sa.Column(
+            "video_upscale_enabled_snapshot",
+            sa.Boolean(),
+            server_default=sa.text("false"),
+            nullable=False,
+        ),
+    )
+    op.add_column(
+        "generation_records",
+        sa.Column("video_upscale_snapshot_json", sa.Text(), nullable=True),
+    )
+    op.add_column(
+        "generation_records",
+        sa.Column("pipeline_stage", sa.String(length=48), nullable=True),
+    )
+    op.create_index(
+        "ix_generation_records_pipeline_stage",
+        "generation_records",
+        ["pipeline_stage"],
+        unique=False,
+    )
+
+    op.create_table(
+        "video_upscale_tasks",
+        sa.Column("id", sa.String(length=32), nullable=False),
+        sa.Column("chat_generation_task_id", sa.String(length=32), nullable=True),
+        sa.Column("generation_record_id", sa.String(length=32), nullable=True),
+        sa.Column("status", sa.String(length=32), server_default="pending", nullable=False),
+        sa.Column("stage", sa.String(length=48), server_default="upscale_queued", nullable=False),
+        sa.Column("processor_key", sa.String(length=64), nullable=False),
+        sa.Column("attempt_count", sa.Integer(), server_default="0", nullable=False),
+        sa.Column("failure_count", sa.Integer(), server_default="0", nullable=False),
+        sa.Column("manual_retry_count", sa.Integer(), server_default="0", nullable=False),
+        sa.Column("next_retry_at", sa.DateTime(timezone=True), nullable=True),
+        sa.Column("last_error", sa.Text(), nullable=True),
+        sa.Column("source_local_path", sa.Text(), nullable=True),
+        sa.Column("source_file_size_bytes", sa.BigInteger(), server_default="0", nullable=False),
+        sa.Column("source_width", sa.Integer(), nullable=True),
+        sa.Column("source_height", sa.Integer(), nullable=True),
+        sa.Column("source_duration_seconds", sa.Float(), nullable=True),
+        sa.Column("source_deleted_at", sa.DateTime(timezone=True), nullable=True),
+        sa.Column("source_delete_error", sa.Text(), nullable=True),
+        sa.Column("source_remote_url", sa.Text(), nullable=True),
+        sa.Column("source_remote_url_signed_at", sa.DateTime(timezone=True), nullable=True),
+        sa.Column("source_remote_url_expires_at", sa.DateTime(timezone=True), nullable=True),
+        sa.Column("source_remote_url_last_probe_at", sa.DateTime(timezone=True), nullable=True),
+        sa.Column("source_remote_url_probe_status", sa.String(length=32), nullable=True),
+        sa.Column("input_source_type", sa.String(length=32), nullable=True),
+        sa.Column("input_source_fallback_count", sa.Integer(), server_default="0", nullable=False),
+        sa.Column("target_width", sa.Integer(), nullable=False),
+        sa.Column("target_height", sa.Integer(), nullable=False),
+        sa.Column("effective_target_width", sa.Integer(), nullable=True),
+        sa.Column("effective_target_height", sa.Integer(), nullable=True),
+        sa.Column("provider_task_id", sa.String(length=160), nullable=True),
+        sa.Column("provider_request_json", sa.Text(), nullable=True),
+        sa.Column("provider_response_json", sa.Text(), nullable=True),
+        sa.Column("provider_output_url", sa.Text(), nullable=True),
+        sa.Column("provider_output_url_expires_at", sa.DateTime(timezone=True), nullable=True),
+        sa.Column("provider_submitted_at", sa.DateTime(timezone=True), nullable=True),
+        sa.Column("final_local_path", sa.Text(), nullable=True),
+        sa.Column("final_resource_url", sa.Text(), nullable=True),
+        sa.Column("final_file_size_bytes", sa.BigInteger(), server_default="0", nullable=False),
+        sa.Column("celery_task_id", sa.String(length=160), nullable=True),
+        sa.Column("lease_token", sa.String(length=64), nullable=True),
+        sa.Column("lease_until", sa.DateTime(timezone=True), nullable=True),
+        sa.Column("started_at", sa.DateTime(timezone=True), nullable=True),
+        sa.Column("completed_at", sa.DateTime(timezone=True), nullable=True),
+        sa.Column("failed_at", sa.DateTime(timezone=True), nullable=True),
+        sa.Column("created_at", sa.DateTime(timezone=True), server_default=sa.text("now()"), nullable=False),
+        sa.Column("updated_at", sa.DateTime(timezone=True), server_default=sa.text("now()"), nullable=False),
+        sa.CheckConstraint(
+            "(chat_generation_task_id IS NOT NULL AND generation_record_id IS NULL) OR "
+            "(chat_generation_task_id IS NULL AND generation_record_id IS NOT NULL)",
+            name="ck_video_upscale_tasks_exactly_one_owner",
+        ),
+        sa.ForeignKeyConstraint(
+            ["chat_generation_task_id"],
+            ["chat_generation_tasks.id"],
+            ondelete="CASCADE",
+        ),
+        sa.ForeignKeyConstraint(
+            ["generation_record_id"],
+            ["generation_records.id"],
+            ondelete="CASCADE",
+        ),
+        sa.PrimaryKeyConstraint("id"),
+    )
+    op.create_index(
+        "idx_video_upscale_tasks_provider_task_id",
+        "video_upscale_tasks",
+        ["provider_task_id"],
+        unique=False,
+    )
+    op.create_index(
+        "idx_video_upscale_tasks_status_lease",
+        "video_upscale_tasks",
+        ["status", "lease_until"],
+        unique=False,
+    )
+    op.create_index(
+        "idx_video_upscale_tasks_status_next_retry",
+        "video_upscale_tasks",
+        ["status", "next_retry_at"],
+        unique=False,
+    )
+    op.create_index(
+        "uq_video_upscale_tasks_chat_task",
+        "video_upscale_tasks",
+        ["chat_generation_task_id"],
+        unique=True,
+    )
+    op.create_index(
+        "uq_video_upscale_tasks_generation_record",
+        "video_upscale_tasks",
+        ["generation_record_id"],
+        unique=True,
+    )
+
+
+def downgrade() -> None:
+    op.drop_index("uq_video_upscale_tasks_generation_record", table_name="video_upscale_tasks")
+    op.drop_index("uq_video_upscale_tasks_chat_task", table_name="video_upscale_tasks")
+    op.drop_index("idx_video_upscale_tasks_status_next_retry", table_name="video_upscale_tasks")
+    op.drop_index("idx_video_upscale_tasks_status_lease", table_name="video_upscale_tasks")
+    op.drop_index("idx_video_upscale_tasks_provider_task_id", table_name="video_upscale_tasks")
+    op.drop_table("video_upscale_tasks")
+
+    op.drop_index("ix_generation_records_pipeline_stage", table_name="generation_records")
+    op.drop_column("generation_records", "pipeline_stage")
+    op.drop_column("generation_records", "video_upscale_snapshot_json")
+    op.drop_column("generation_records", "video_upscale_enabled_snapshot")
+    op.drop_column("generation_records", "provider_generation_resolution")
+
+    op.drop_column("chat_generation_tasks", "video_upscale_snapshot_json")
+    op.drop_column("chat_generation_tasks", "video_upscale_enabled_snapshot")
+    op.drop_column("chat_generation_tasks", "provider_generation_resolution")
diff --git a/video-gen-api/app/api/admin/__init__.py b/video-gen-api/app/api/admin/__init__.py
index 359841ab..707543fd 100644
--- a/video-gen-api/app/api/admin/__init__.py
+++ b/video-gen-api/app/api/admin/__init__.py
@@ -1,6 +1,7 @@
 from fastapi import APIRouter
 
 from app.api.admin.video_prompt_schema_config import router as video_prompt_schema_config_router
+from app.api.admin.video_upscale import router as video_upscale_router
 from app.api.admin.resource_capacity import router as resource_capacity_router
 from app.api.admin.team import router as team_router
 from app.api.admin.home_material import router as home_material_router
@@ -11,6 +12,7 @@ from app.api.admin.upload import router as admin_upload_router
 
 router = APIRouter()
 router.include_router(video_prompt_schema_config_router)
+router.include_router(video_upscale_router)
 router.include_router(resource_capacity_router)
 router.include_router(team_router)
 router.include_router(home_material_router)
diff --git a/video-gen-api/app/api/admin/video_upscale.py b/video-gen-api/app/api/admin/video_upscale.py
new file mode 100644
index 00000000..85a6bac6
--- /dev/null
+++ b/video-gen-api/app/api/admin/video_upscale.py
@@ -0,0 +1,53 @@
+from __future__ import annotations
+
+import json
+
+from fastapi import APIRouter, Depends
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from app.dependencies import get_admin_user, get_db
+from app.models.user import User
+from app.schemas.video_upscale import VideoUpscaleConfigOut, VideoUpscaleConfigSaveRequest
+from app.services.operation_log import log_operation
+from app.services.video_upscale.config_service import get_video_upscale_config, save_video_upscale_config
+
+router = APIRouter(prefix="/admin/video-upscale", tags=["admin-video-upscale"])
+
+
+@router.get("/config", response_model=VideoUpscaleConfigOut, summary="获取视频超分配置")
+async def get_config(
+    admin: User = Depends(get_admin_user),
+    db: AsyncSession = Depends(get_db),
+):
+    _ = admin
+    return await get_video_upscale_config(db)
+
+
+@router.put("/config", response_model=VideoUpscaleConfigOut, summary="保存视频超分配置")
+async def save_config(
+    req: VideoUpscaleConfigSaveRequest,
+    admin: User = Depends(get_admin_user),
+    db: AsyncSession = Depends(get_db),
+):
+    before = await get_video_upscale_config(db)
+    result = await save_video_upscale_config(db, req.data)
+    await log_operation(
+        db,
+        admin.id,
+        admin.username,
+        "保存视频超分配置",
+        "PUT",
+        "/admin/video-upscale/config",
+        detail=json.dumps(
+            {
+                "before_version": before["data"].get("version"),
+                "after_version": result["data"].get("version"),
+                "enabled": result["data"].get("enabled"),
+                "delete_source_after_success": result["data"].get("delete_source_after_success"),
+                "rule_count": len(result["data"].get("rules") or []),
+            },
+            ensure_ascii=False,
+        ),
+    )
+    await db.commit()
+    return result
diff --git a/video-gen-api/app/api/v1/admin.py b/video-gen-api/app/api/v1/admin.py
index 3e18a985..2442e1b5 100644
--- a/video-gen-api/app/api/v1/admin.py
+++ b/video-gen-api/app/api/v1/admin.py
@@ -24,6 +24,7 @@ from app.models.credit_ratio import CreditRatio
 from app.models.operation_log import OperationLog
 from app.enums.user import FrontendUserKind, UserType
 from app.enums.team import TEAM_UNASSIGNED_VALUE
+from app.enums.generation_status import GenerationRecordPipelineStage
 from app.schemas.admin import (
     CreditAdjustRequest,
     ModelConfigCreate,
@@ -1920,6 +1921,8 @@ async def admin_list_generation_records(
             "aspect_ratio": record.aspect_ratio,
             "resolution": record.resolution,
             "status": record.status,
+            "pipeline_stage": record.pipeline_stage,
+            "video_upscale_enabled": bool(record.video_upscale_enabled_snapshot),
             "video_url": build_resource_signed_url(record.video_url) if record.video_url else '',
             "video_cover_url": build_resource_signed_url(record.video_cover_url) if record.video_cover_url else '',
             "references": refs,
@@ -2033,6 +2036,8 @@ async def admin_generate_video(
 
     if record.status not in ("prompt_optimized", "failed"):
         raise HTTPException(status_code=400, detail=f"当前状态不允许生成{type_str}")
+    if record.pipeline_stage == GenerationRecordPipelineStage.UPSCALE_FAILED.value:
+        raise HTTPException(status_code=409, detail="该任务为画质增强失败，请使用超分恢复命令处理")
 
     attempt_no = await get_next_credit_attempt_no(
         db,
@@ -2049,6 +2054,21 @@ async def admin_generate_video(
         if resolution not in RESOLUTIONS:
             raise HTTPException(status_code=400, detail="不支持的分辨率")
 
+        from app.services.video_gen import get_active_engine
+        from app.services.video_upscale.snapshot_service import build_video_upscale_snapshot
+
+        engine = await get_active_engine(db)
+        try:
+            supported_provider_resolutions = json.loads(engine.supported_resolutions or "[]")
+        except (TypeError, json.JSONDecodeError):
+            supported_provider_resolutions = []
+        provider_resolution, upscale_enabled, upscale_snapshot_json = await build_video_upscale_snapshot(
+            db,
+            target_resolution=resolution,
+            aspect_ratio=aspect_ratio,
+            supported_provider_resolutions=supported_provider_resolutions,
+        )
+
         duration = record.duration or 5
         media_billing = await charge_generation_media_by_params(
             db,
@@ -2065,6 +2085,10 @@ async def admin_generate_video(
 
         record.aspect_ratio = aspect_ratio
         record.resolution = resolution
+        record.provider_generation_resolution = provider_resolution
+        record.video_upscale_enabled_snapshot = upscale_enabled
+        record.video_upscale_snapshot_json = upscale_snapshot_json
+        record.pipeline_stage = GenerationRecordPipelineStage.CREATING_PROVIDER_TASK.value
         record.credits_cost = round(float(record.credits_cost or 0) + media_billing.total_charged, 2)
         record.status = "generating"
         record.error_message = None
@@ -2075,8 +2099,7 @@ async def admin_generate_video(
         await db.flush()
 
         try:
-            from app.services.video_gen import get_active_engine, submit_video_task
-            engine = await get_active_engine(db)
+            from app.services.video_gen import submit_video_task
             task_id = await submit_video_task(
                 db,
                 engine,
@@ -2084,9 +2107,11 @@ async def admin_generate_video(
                 include_media_references=False,
             )
             record.seedance_task_id = task_id
+            record.pipeline_stage = GenerationRecordPipelineStage.WAITING_REMOTE.value
             await db.flush()
             await task_queue.enqueue(record_id)
         except Exception as e:
+            record.pipeline_stage = GenerationRecordPipelineStage.FAILED.value
             await mark_generation_record_failed_and_refund_once(
                 db,
                 record=record,
@@ -2119,6 +2144,10 @@ async def admin_generate_video(
         record.video_url = None
         record.video_cover_url = None
         record.seedance_task_id = None
+        record.provider_generation_resolution = None
+        record.video_upscale_enabled_snapshot = False
+        record.video_upscale_snapshot_json = None
+        record.pipeline_stage = None
         await db.flush()
 
         try:
diff --git a/video-gen-api/app/api/v1/generation.py b/video-gen-api/app/api/v1/generation.py
index d7fbab45..c16788dd 100644
--- a/video-gen-api/app/api/v1/generation.py
+++ b/video-gen-api/app/api/v1/generation.py
@@ -41,6 +41,7 @@ from app.services.resource_capacity_service import assert_user_resource_capacity
 from app.services.upload_resource import delete_unbound_upload_resource, upload_reference_file, cleanup_upload_resource_files_after_commit
 from app.services.upload_resource.log_service import log_upload_resource_exception, safe_rollback_with_log
 from app.enums.upload_resource import UploadResourceEventEnum, UploadResourceModuleEnum, UploadResourceTypeEnum
+from app.enums.generation_status import GenerationRecordPipelineStage
 from app.services.generation.billing_service import (
     CHARGE_TEXT_PROMPT,
     OWNER_GENERATION_RECORD,
@@ -101,6 +102,8 @@ def _record_to_out(record: GenerationRecord, project_name: str, refs_override: l
         image_proportion=record.image_proportion,
         image_px=record.image_px,
         status=record.status,
+        pipeline_stage=record.pipeline_stage,
+        video_upscale_enabled=bool(record.video_upscale_enabled_snapshot),
         video_url=build_resource_signed_url(record.video_url) if record.video_url else '',
         video_cover_url=build_resource_signed_url(record.video_cover_url) if record.video_cover_url else '',
         image_url=build_resource_signed_url(record.image_url) if record.image_url else '',
@@ -416,6 +419,8 @@ async def generate(
     record, project_name = row
     if record.status not in ("prompt_optimized", "failed"):
         raise InvalidStatusError("当前状态不允许生成")
+    if record.pipeline_stage == GenerationRecordPipelineStage.UPSCALE_FAILED.value:
+        raise InvalidStatusError("该任务生成失败，请联系客服进行修复")
 
     await assert_user_resource_capacity_available(db, current_user.id)
 
@@ -432,6 +437,21 @@ async def generate(
         if req.resolution not in RESOLUTIONS:
             raise HTTPException(status_code=400, detail="不支持的分辨率")
 
+        from app.services.video_gen import get_active_engine
+        from app.services.video_upscale.snapshot_service import build_video_upscale_snapshot
+
+        engine = await get_active_engine(db)
+        try:
+            supported_provider_resolutions = json.loads(engine.supported_resolutions or "[]")
+        except (TypeError, json.JSONDecodeError):
+            supported_provider_resolutions = []
+        provider_resolution, upscale_enabled, upscale_snapshot_json = await build_video_upscale_snapshot(
+            db,
+            target_resolution=req.resolution,
+            aspect_ratio=req.aspect_ratio,
+            supported_provider_resolutions=supported_provider_resolutions,
+        )
+
         duration = record.duration or 5
         media_billing = await charge_generation_media_by_params(
             db,
@@ -448,6 +468,10 @@ async def generate(
 
         record.aspect_ratio = req.aspect_ratio
         record.resolution = req.resolution
+        record.provider_generation_resolution = provider_resolution
+        record.video_upscale_enabled_snapshot = upscale_enabled
+        record.video_upscale_snapshot_json = upscale_snapshot_json
+        record.pipeline_stage = GenerationRecordPipelineStage.CREATING_PROVIDER_TASK.value
         record.credits_cost = round(float(record.credits_cost or 0) + media_billing.total_charged, 2)
         record.status = "generating"
         record.error_message = None
@@ -458,11 +482,10 @@ async def generate(
         await db.flush()
 
         try:
-            from app.services.video_gen import get_active_engine, submit_video_task
+            from app.services.video_gen import submit_video_task
             from app.services.error_codes import extract_error_message
             from app.services.video_queue import task_queue
 
-            engine = await get_active_engine(db)
             task_id = await submit_video_task(
                 db,
                 engine,
@@ -470,9 +493,11 @@ async def generate(
                 include_media_references=False,
             )
             record.seedance_task_id = task_id
+            record.pipeline_stage = GenerationRecordPipelineStage.WAITING_REMOTE.value
             await db.flush()
             await task_queue.enqueue(record_id)
         except Exception as e:
+            record.pipeline_stage = GenerationRecordPipelineStage.FAILED.value
             await mark_generation_record_failed_and_refund_once(
                 db,
                 record=record,
@@ -502,6 +527,10 @@ async def generate(
         record.video_url = None
         record.video_cover_url = None
         record.seedance_task_id = None
+        record.provider_generation_resolution = None
+        record.video_upscale_enabled_snapshot = False
+        record.video_upscale_snapshot_json = None
+        record.pipeline_stage = None
         await db.flush()
 
         try:
@@ -543,6 +572,8 @@ async def retry_generation(
     record, project_name = row
     if record.status != "failed":
         raise InvalidStatusError("只有失败的记录可以重试")
+    if record.pipeline_stage == GenerationRecordPipelineStage.UPSCALE_FAILED.value:
+        raise InvalidStatusError("该任务生成失败，请联系客服进行修复")
 
     await assert_user_resource_capacity_available(db, current_user.id)
 
@@ -551,6 +582,27 @@ async def retry_generation(
         owner_type=OWNER_GENERATION_RECORD,
         owner_id=record.id,
     )
+    engine = None
+    if record.gen_type == GenerationType.video:
+        from app.services.video_gen import get_active_engine
+        from app.services.video_upscale.snapshot_service import build_video_upscale_snapshot
+
+        engine = await get_active_engine(db)
+        try:
+            supported_provider_resolutions = json.loads(engine.supported_resolutions or "[]")
+        except (TypeError, json.JSONDecodeError):
+            supported_provider_resolutions = []
+        provider_resolution, upscale_enabled, upscale_snapshot_json = await build_video_upscale_snapshot(
+            db,
+            target_resolution=record.resolution or "",
+            aspect_ratio=record.aspect_ratio or "",
+            supported_provider_resolutions=supported_provider_resolutions,
+        )
+        record.provider_generation_resolution = provider_resolution
+        record.video_upscale_enabled_snapshot = upscale_enabled
+        record.video_upscale_snapshot_json = upscale_snapshot_json
+        record.pipeline_stage = GenerationRecordPipelineStage.CREATING_PROVIDER_TASK.value
+
     media_billing = await charge_generation_media_for_record(
         db,
         record=record,
@@ -572,8 +624,8 @@ async def retry_generation(
     try:
         from app.services.video_queue import task_queue
         if record.gen_type == GenerationType.video:
-            from app.services.video_gen import get_active_engine, submit_video_task, extract_error_message
-            engine = await get_active_engine(db)
+            from app.services.video_gen import submit_video_task
+            assert engine is not None
             task_id = await submit_video_task(
                 db,
                 engine,
@@ -581,10 +633,13 @@ async def retry_generation(
                 include_media_references=False,
             )
             record.seedance_task_id = task_id
+            record.pipeline_stage = GenerationRecordPipelineStage.WAITING_REMOTE.value
             await db.flush()
         await task_queue.enqueue(record_id)
     except Exception as e:
         from app.services.error_codes import extract_error_message
+        if record.gen_type == GenerationType.video:
+            record.pipeline_stage = GenerationRecordPipelineStage.FAILED.value
         await mark_generation_record_failed_and_refund_once(
             db,
             record=record,
@@ -679,6 +734,8 @@ async def get_queue_status(
     return {
         "record_id": record.id,
         "status": record.status,
+        "pipeline_stage": record.pipeline_stage,
+        "video_upscale_enabled": bool(record.video_upscale_enabled_snapshot),
         "queue_position": queue_position,
         "estimated_wait_seconds": estimated_wait_seconds,
     }
@@ -705,65 +762,54 @@ async def seedance_callback(request: Request, db: AsyncSession = Depends(get_db)
     record = result.scalar_one_or_none()
     if not record:
         return {"message": "record not found"}
+    if record.status == "completed":
+        return {"message": "already completed"}
+    if str(record.pipeline_stage or "").startswith("upscale_"):
+        return {"message": "upscale already started"}
 
     if task_status == "succeeded":
-        remote_url = data.get("content", {}).get("video_url", "")
-        record.status = "completed"
-        storage_path = None
-        file_size_bytes = 0
-        # Download video to local storage
-        if settings.STORAGE_TYPE == "local" and remote_url:
-            try:
-                from app.services.video_gen import download_video
-                date_dir = datetime.now().strftime("%Y/%m/%d")
-                dest_dir = os.path.join(settings.STORAGE_LOCAL_PATH, date_dir)
-                os.makedirs(dest_dir, exist_ok=True)
-                dest = os.path.join(dest_dir, f"{record.id}.mp4")
-                await download_video(remote_url, dest)
-                record.video_url = f"/generate/videos/{date_dir}/{record.id}.mp4"
-                cover_url, _cover_storage_path = await async_create_video_cover_for_local_video(
-                    record_id=record.id,
-                    video_path=dest,
-                    date_dir=date_dir,
-                    log_prefix=f"SeedanceCallback视频封面生成 record_id={record.id}",
-                )
-                record.video_cover_url = cover_url
-                storage_path = dest
-                file_size_bytes = safe_file_size(dest)
-            except Exception as e:
-                logger.warning(f"Callback download failed, using remote URL: {e}")
-                record.video_url = remote_url
-        else:
-            record.video_url = remote_url
-        record.generated_at = datetime.now(CST)
-        if record.video_url:
-            await record_generation_record_generated_resource(
-                db,
-                record,
-                resource_url=record.video_url,
-                storage_path=storage_path,
-                file_size_bytes=file_size_bytes,
-                remote_url=remote_url,
-                generated_at=record.generated_at,
+        remote_url = str(data.get("content", {}).get("video_url", "") or "").strip()
+        if not remote_url:
+            record.pipeline_stage = GenerationRecordPipelineStage.FAILED.value
+            await mark_generation_record_failed_and_refund_once(
+                db, record=record, error_message="供应商回调成功但未返回视频地址"
             )
-        # Extract video token usage from callback
-        usage = data.get("usage", {})
-        if usage:
-            record.video_tokens_used = usage.get("total_tokens", 0)
-        await sync_generation_record_media_token_snapshot(db, record, provider_response=data)
-        # Log callback response
-        from app.services.video_gen import _log_video_response
-        _log_video_response(record.id, data)
-        # Notify user
-        from app.services.notification import create_notification
-        from app.api.v1.notifications import push_notification_to_user
-        notif = await create_notification(
-            db, record.user_id, "视频生成完成",
-            "您的视频已生成完成，可以查看了。", "video", record.id,
-        )
-        await push_notification_to_user(record.user_id, notif)
+        else:
+            usage = data.get("usage", {}) if isinstance(data.get("usage"), dict) else {}
+            from app.services.video_queue import handle_generation_record_video_succeeded
+            try:
+                entered_upscale = await handle_generation_record_video_succeeded(
+                    db,
+                    record,
+                    remote_url=remote_url,
+                    provider_response=data,
+                    video_tokens=usage.get("total_tokens", 0),
+                )
+            except Exception as exc:
+                await db.rollback()
+                result = await db.execute(
+                    select(GenerationRecord).where(GenerationRecord.id == record.id).with_for_update().limit(1)
+                )
+                failed_record = result.scalar_one_or_none()
+                if failed_record:
+                    failed_record.pipeline_stage = GenerationRecordPipelineStage.FAILED.value
+                    await mark_generation_record_failed_and_refund_once(
+                        db, record=failed_record, error_message=f"视频结果下载失败: {exc}"
+                    )
+                entered_upscale = False
+            from app.services.video_gen import _log_video_response
+            _log_video_response(record.id, data)
+            if not entered_upscale and record.status == "completed":
+                from app.services.notification import create_notification
+                from app.api.v1.notifications import push_notification_to_user
+                notif = await create_notification(
+                    db, record.user_id, "视频生成完成",
+                    "您的视频已生成完成，可以查看了。", "video", record.id,
+                )
+                await push_notification_to_user(record.user_id, notif)
     elif task_status == "failed":
         error_message = data.get("error", "视频生成失败")
+        record.pipeline_stage = GenerationRecordPipelineStage.FAILED.value
         await mark_generation_record_failed_and_refund_once(
             db,
             record=record,
diff --git a/video-gen-api/app/api/v1/generation_ai.py b/video-gen-api/app/api/v1/generation_ai.py
index 03345970..88010ade 100644
--- a/video-gen-api/app/api/v1/generation_ai.py
+++ b/video-gen-api/app/api/v1/generation_ai.py
@@ -761,6 +761,20 @@ async def retry_task(
             raise HTTPException(status_code=400, detail="只有失败任务可以重试")
         retry_targets = [task]
 
+    upscale_failed_ids = [
+        str(target.id)
+        for target in retry_targets
+        if target.pipeline_stage == ChatGenerationPipelineStage.UPSCALE_FAILED.value
+    ]
+    if upscale_failed_ids:
+        raise HTTPException(
+            status_code=409,
+            detail={
+                "message": "画质增强失败任务不能通过普通生成重试，请由管理员使用视频超分恢复命令处理",
+                "task_ids": upscale_failed_ids,
+            },
+        )
+
     await assert_user_resource_capacity_available(db, current_user.id)
     enqueue_ids: list[str] = []
     download_retry_ids: list[str] = []
diff --git a/video-gen-api/app/api/v1/projects.py b/video-gen-api/app/api/v1/projects.py
index 56473f5e..5ab8d269 100644
--- a/video-gen-api/app/api/v1/projects.py
+++ b/video-gen-api/app/api/v1/projects.py
@@ -10,6 +10,7 @@ from app.models.project import Project
 from app.models.generation_record import GenerationRecord
 from app.schemas.project import ProjectCreate, ProjectOut
 from app.services.resource_accounting_service import soft_delete_generation_record_resources
+from app.services.video_upscale.guard_service import assert_no_recoverable_failed_upscale_tasks
 from app.utils.id_gen import generate_id
 
 router = APIRouter(prefix="/projects", tags=["projects"])
@@ -88,6 +89,10 @@ async def delete_project(
     )
     records = list(records_result.scalars().all())
     record_ids = [record.id for record in records]
+    await assert_no_recoverable_failed_upscale_tasks(
+        db,
+        generation_record_ids=record_ids,
+    )
     now = datetime.now(timezone.utc)
 
     project.deleted_at = now
diff --git a/video-gen-api/app/cmd/retry_video_upscale.py b/video-gen-api/app/cmd/retry_video_upscale.py
new file mode 100644
index 00000000..18738d57
--- /dev/null
+++ b/video-gen-api/app/cmd/retry_video_upscale.py
@@ -0,0 +1,188 @@
+from __future__ import annotations
+
+import argparse
+import asyncio
+import json
+from datetime import datetime, timezone
+
+from sqlalchemy import or_, select
+
+from app.config import settings
+from app.enums.video_upscale import LOCAL_PROCESSOR_KEYS, VideoUpscaleTaskStatus
+from app.models.base import async_session
+from app.models.chat_generation_task import ChatGenerationTask
+from app.models.generation_record import GenerationRecord
+from app.models.module_generation_step import ModuleGenerationStep
+from app.models.shot_replicate_segment import ShotReplicateSegment
+from app.models.video_upscale_task import VideoUpscaleTask
+from app.services.video_upscale.media_service import is_valid_file
+from app.services.video_upscale.task_service import reset_failed_upscale_task_for_manual_retry
+
+
+def _parser() -> argparse.ArgumentParser:
+    parser = argparse.ArgumentParser(description="人工恢复视频超分任务")
+    parser.add_argument("--task-id", action="append", default=[], help="ChatGenerationTask.id，可重复传入")
+    parser.add_argument("--task-ids", default="", help="逗号分隔的 ChatGenerationTask.id")
+    parser.add_argument("--generation-record-id", action="append", default=[], help="GenerationRecord.id，可重复传入")
+    parser.add_argument("--generation-record-ids", default="", help="逗号分隔的 GenerationRecord.id")
+    parser.add_argument("--project-id", action="append", default=[], help="Project.id，可重复传入")
+    parser.add_argument("--generation-mode", default="", help="按 ChatGenerationTask.generation_mode 筛选")
+    parser.add_argument("--module-owner-id", default="", help="ModuleGenerationProject.id")
+    parser.add_argument("--shot-task-set-id", default="", help="ShotReplicateTaskSet.id")
+    parser.add_argument("--shot-segment-id", action="append", default=[], help="ShotReplicateSegment.id，可重复传入")
+    parser.add_argument("--failed-only", action=argparse.BooleanOptionalAction, default=True)
+    parser.add_argument("--limit", type=int, default=100)
+    parser.add_argument("--dry-run", action="store_true")
+    parser.add_argument("--enqueue", action=argparse.BooleanOptionalAction, default=True)
+    parser.add_argument("--force-resubmit", action="store_true", help="远程任务清空 provider task/result 后从 source.mp4 重新提交")
+    return parser
+
+
+async def _collect_chat_task_ids(db, args: argparse.Namespace) -> list[str]:
+    ids = [str(item).strip() for item in args.task_id if str(item).strip()]
+    ids.extend(item.strip() for item in str(args.task_ids or "").split(",") if item.strip())
+    project_ids: list[str] = [str(args.module_owner_id).strip()] if args.module_owner_id else []
+
+    segment_ids = [str(item).strip() for item in args.shot_segment_id if str(item).strip()]
+    if args.shot_task_set_id or segment_ids:
+        query = select(ShotReplicateSegment.module_project_id).where(
+            ShotReplicateSegment.deleted_at.is_(None),
+            ShotReplicateSegment.module_project_id.is_not(None),
+        )
+        if args.shot_task_set_id:
+            query = query.where(ShotReplicateSegment.task_set_id == str(args.shot_task_set_id).strip())
+        if segment_ids:
+            query = query.where(ShotReplicateSegment.id.in_(segment_ids))
+        result = await db.execute(query)
+        project_ids.extend(str(value) for value in result.scalars().all() if value)
+
+    project_ids = list(dict.fromkeys(item for item in project_ids if item))
+    if project_ids:
+        result = await db.execute(
+            select(ModuleGenerationStep.chat_task_id).where(
+                ModuleGenerationStep.project_id.in_(project_ids),
+                ModuleGenerationStep.chat_task_id.isnot(None),
+                ModuleGenerationStep.deleted_at.is_(None),
+            )
+        )
+        ids.extend(str(value) for value in result.scalars().all() if value)
+    return list(dict.fromkeys(ids))
+
+
+async def _collect_generation_record_ids(db, args: argparse.Namespace) -> list[str]:
+    ids = [str(item).strip() for item in args.generation_record_id if str(item).strip()]
+    ids.extend(item.strip() for item in str(args.generation_record_ids or "").split(",") if item.strip())
+    project_ids = [str(item).strip() for item in args.project_id if str(item).strip()]
+    if project_ids:
+        result = await db.execute(
+            select(GenerationRecord.id).where(
+                GenerationRecord.project_id.in_(project_ids),
+                GenerationRecord.deleted_at.is_(None),
+            )
+        )
+        ids.extend(str(value) for value in result.scalars().all() if value)
+    return list(dict.fromkeys(ids))
+
+
+def _owner_preview(upscale: VideoUpscaleTask, chat: ChatGenerationTask | None, record: GenerationRecord | None) -> dict:
+    owner = chat or record
+    return {
+        "upscale_task_id": upscale.id,
+        "owner_type": "chat_generation_task" if chat else "generation_record",
+        "owner_id": owner.id if owner else None,
+        "chat_task_id": chat.id if chat else None,
+        "generation_record_id": record.id if record else None,
+        "project_id": record.project_id if record else None,
+        "generation_mode": chat.generation_mode if chat else None,
+        "status": upscale.status,
+        "stage": upscale.stage,
+        "processor_key": upscale.processor_key,
+        "source_local_path": upscale.source_local_path,
+        "provider_task_id": upscale.provider_task_id,
+        "provider_output_url_expires_at": upscale.provider_output_url_expires_at,
+    }
+
+
+async def _run(args: argparse.Namespace) -> dict:
+    async with async_session() as db:
+        chat_ids = await _collect_chat_task_ids(db, args)
+        record_ids = await _collect_generation_record_ids(db, args)
+        query = (
+            select(VideoUpscaleTask, ChatGenerationTask, GenerationRecord)
+            .outerjoin(ChatGenerationTask, ChatGenerationTask.id == VideoUpscaleTask.chat_generation_task_id)
+            .outerjoin(GenerationRecord, GenerationRecord.id == VideoUpscaleTask.generation_record_id)
+            .where(
+                or_(
+                    (ChatGenerationTask.id.isnot(None) & ChatGenerationTask.deleted_at.is_(None)),
+                    (GenerationRecord.id.isnot(None) & GenerationRecord.deleted_at.is_(None)),
+                )
+            )
+            .order_by(VideoUpscaleTask.updated_at.asc())
+            .limit(max(1, min(int(args.limit or 100), 1000)))
+        )
+        owner_filters = []
+        if chat_ids:
+            owner_filters.append(VideoUpscaleTask.chat_generation_task_id.in_(chat_ids))
+        if record_ids:
+            owner_filters.append(VideoUpscaleTask.generation_record_id.in_(record_ids))
+        if owner_filters:
+            query = query.where(or_(*owner_filters))
+        if args.generation_mode:
+            query = query.where(ChatGenerationTask.generation_mode == args.generation_mode)
+        if args.failed_only:
+            query = query.where(VideoUpscaleTask.status == VideoUpscaleTaskStatus.FAILED.value)
+        result = await db.execute(query)
+        rows = result.all()
+        preview = [_owner_preview(upscale, chat, record) for upscale, chat, record in rows]
+        if args.dry_run or not args.enqueue:
+            return {"dry_run": True, "matched": len(preview), "items": preview}
+
+        from app.tasks.video_upscale_tasks import download_remote_result, execute_local, finalize, poll_remote, submit_remote
+
+        enqueued = []
+        for upscale, chat, record in rows:
+            reset = await reset_failed_upscale_task_for_manual_retry(
+                db,
+                upscale_task_id=upscale.id,
+                force_resubmit=bool(args.force_resubmit),
+            )
+            if is_valid_file(reset.final_local_path) and not args.force_resubmit:
+                action = "finalize"
+                finalize.apply_async(args=[reset.id], queue=settings.VIDEO_UPSCALE_LOCAL_QUEUE)
+            elif reset.processor_key in LOCAL_PROCESSOR_KEYS:
+                action = "local"
+                execute_local.apply_async(args=[reset.id], queue=settings.VIDEO_UPSCALE_LOCAL_QUEUE)
+            else:
+                expires_at = reset.provider_output_url_expires_at
+                if expires_at and expires_at.tzinfo is None:
+                    expires_at = expires_at.replace(tzinfo=timezone.utc)
+                remaining = (expires_at - datetime.now(timezone.utc)).total_seconds() if expires_at else None
+                if reset.provider_output_url and remaining is not None and remaining >= 2 * 3600 and not args.force_resubmit:
+                    action = "download"
+                    download_remote_result.apply_async(args=[reset.id], queue=settings.VIDEO_UPSCALE_REMOTE_QUEUE)
+                elif reset.provider_task_id and not args.force_resubmit:
+                    action = "poll"
+                    poll_remote.apply_async(args=[reset.id], queue=settings.VIDEO_UPSCALE_REMOTE_QUEUE)
+                else:
+                    action = "submit"
+                    submit_remote.apply_async(args=[reset.id], queue=settings.VIDEO_UPSCALE_REMOTE_QUEUE)
+            owner = chat or record
+            enqueued.append(
+                {
+                    "upscale_task_id": reset.id,
+                    "owner_type": "chat_generation_task" if chat else "generation_record",
+                    "owner_id": owner.id if owner else None,
+                    "action": action,
+                }
+            )
+        return {"dry_run": False, "matched": len(preview), "enqueued": enqueued}
+
+
+def main() -> None:
+    args = _parser().parse_args()
+    result = asyncio.run(_run(args))
+    print(json.dumps(result, ensure_ascii=False, indent=2, default=str))
+
+
+if __name__ == "__main__":
+    main()
diff --git a/video-gen-api/app/config.py b/video-gen-api/app/config.py
index 7f4621f8..7a45901a 100644
--- a/video-gen-api/app/config.py
+++ b/video-gen-api/app/config.py
@@ -95,6 +95,28 @@ class Settings(BaseSettings):
     # - FFMPEG_BIN 为空时自动从系统 PATH 查找 ffmpeg / ffmpeg.exe。
     # - VIDEO_COVER_TIMEOUT_SECONDS 必须较短，避免 ffmpeg 异常卡住下载 worker。
     FFMPEG_BIN: str = ""
+
+    # 视频超分配置。
+    # 本地处理器始终复用 FFMPEG_BIN，不允许由管理后台覆盖可执行文件路径。
+    VOLC_API_KEY: str = ""
+    VOLC_MEDIAKIT_API_BASE: str = "https://mediakit.cn-beijing.volces.com"
+    VIDEO_UPSCALE_LOCAL_QUEUE: str = "gen_video_upscale_local"
+    VIDEO_UPSCALE_REMOTE_QUEUE: str = "gen_video_upscale_remote"
+    VIDEO_UPSCALE_LOCAL_TIMEOUT_SECONDS: int = 3600
+    VIDEO_UPSCALE_MAX_ATTEMPTS: int = 3
+    VIDEO_UPSCALE_REMOTE_POLL_INTERVAL_SECONDS: int = 30
+    VIDEO_UPSCALE_REMOTE_POLL_TIMEOUT_SECONDS: int = 7200
+    VIDEO_UPSCALE_REMOTE_REQUEST_TIMEOUT_SECONDS: int = 30
+    VIDEO_UPSCALE_REMOTE_RESULT_DOWNLOAD_TIMEOUT_SECONDS: int = 600
+    VIDEO_UPSCALE_REMOTE_URL_PROBE_THRESHOLD_SECONDS: int = 600
+    VIDEO_UPSCALE_REMOTE_URL_PROBE_CONNECT_TIMEOUT_SECONDS: int = 3
+    VIDEO_UPSCALE_REMOTE_URL_PROBE_READ_TIMEOUT_SECONDS: int = 5
+    VIDEO_UPSCALE_LOCAL_SIGNED_URL_EXPIRE_SECONDS: int = 7200
+    VIDEO_UPSCALE_TASK_LEASE_SECONDS: int = 30 * 60
+    VIDEO_UPSCALE_RETRY_BACKOFF_SECONDS: int = 60
+    VIDEO_UPSCALE_RECOVERY_BATCH_SIZE: int = 50
+    VIDEO_UPSCALE_RECOVERY_LOCK_KEY: str = "vg:celery:video_upscale_recovery_lock"
+
     VIDEO_COVER_SEEK_TIME: str = "00:00:01"
     VIDEO_COVER_FALLBACK_SEEK_TIME: str = "00:00:00"
     VIDEO_COVER_WIDTH: int = 720
diff --git a/video-gen-api/app/enums/celery_queue.py b/video-gen-api/app/enums/celery_queue.py
index 3ba5e3f9..fc3479ee 100644
--- a/video-gen-api/app/enums/celery_queue.py
+++ b/video-gen-api/app/enums/celery_queue.py
@@ -5,6 +5,8 @@ class CeleryQueue(str, Enum):
     GEN_CHATAPI_CREATE = "gen_chatapi_create"
     GEN_PROVIDER_POLL = "gen_provider_poll"
     GEN_RESULT_DOWNLOAD = "gen_result_download"
+    GEN_VIDEO_UPSCALE_LOCAL = "gen_video_upscale_local"
+    GEN_VIDEO_UPSCALE_REMOTE = "gen_video_upscale_remote"
     GEN_RECOVERY = "gen_recovery"
     GEN_PRIVATE_PORTRAIT = "gen_private_portrait"
     DEFAULT = "default"
@@ -16,6 +18,12 @@ class CeleryTaskName(str, Enum):
     DOWNLOAD_GENERATION_RESULT = "generation.download_generation_result_task"
     RECOVER_DOWNLOAD = "generation.recover_download_tasks_once"
     RECOVER_GENERATION = "generation.recover_generation_tasks_once"
+    VIDEO_UPSCALE_EXECUTE_LOCAL = "video_upscale.execute_local"
+    VIDEO_UPSCALE_SUBMIT_REMOTE = "video_upscale.submit_remote"
+    VIDEO_UPSCALE_POLL_REMOTE = "video_upscale.poll_remote"
+    VIDEO_UPSCALE_DOWNLOAD_REMOTE_RESULT = "video_upscale.download_remote_result"
+    VIDEO_UPSCALE_FINALIZE = "video_upscale.finalize"
+    VIDEO_UPSCALE_RECOVER = "video_upscale.recover_once"
     DISPATCH_DUE_POLL = "generation.dispatch_due_poll_tasks"
     STARTUP_RECOVERY = "recovery.startup_recovery_once"
     MODULE_ASYNC_RECOVERY = "module_async.recover_module_async_tasks_once"
diff --git a/video-gen-api/app/enums/generation_status.py b/video-gen-api/app/enums/generation_status.py
index 81dcb791..912ab487 100644
--- a/video-gen-api/app/enums/generation_status.py
+++ b/video-gen-api/app/enums/generation_status.py
@@ -9,6 +9,25 @@ class GenerationStatus(str, Enum):
     failed = "failed"
 
 
+class GenerationRecordPipelineStage(str, Enum):
+    """GenerationRecord 视频生成与超分流水线阶段。"""
+
+    CREATING_PROVIDER_TASK = "creating_provider_task"
+    WAITING_REMOTE = "waiting_remote"
+    POLLING = "polling"
+    RESULT_READY = "result_ready"
+    DOWNLOADING = "downloading"
+    UPSCALE_QUEUED = "upscale_queued"
+    UPSCALE_PROCESSING = "upscale_processing"
+    UPSCALE_POLLING = "upscale_polling"
+    UPSCALE_DOWNLOADING = "upscale_downloading"
+    UPSCALE_FINALIZING = "upscale_finalizing"
+    UPSCALE_RETRY_WAITING = "upscale_retry_waiting"
+    UPSCALE_FAILED = "upscale_failed"
+    DONE = "done"
+    FAILED = "failed"
+
+
 class GenerationType(str, Enum):
     """生成类型。"""
     video = "video"
diff --git a/video-gen-api/app/enums/generation_task.py b/video-gen-api/app/enums/generation_task.py
index bdf4e025..1c2e3e91 100644
--- a/video-gen-api/app/enums/generation_task.py
+++ b/video-gen-api/app/enums/generation_task.py
@@ -40,6 +40,13 @@ class ChatGenerationPipelineStage(str, Enum):
     DOWNLOAD_QUEUED = "download_queued"
     DOWNLOADING = "downloading"
     RETRY_WAITING = "retry_waiting"
+    UPSCALE_QUEUED = "upscale_queued"
+    UPSCALE_PROCESSING = "upscale_processing"
+    UPSCALE_POLLING = "upscale_polling"
+    UPSCALE_DOWNLOADING = "upscale_downloading"
+    UPSCALE_FINALIZING = "upscale_finalizing"
+    UPSCALE_RETRY_WAITING = "upscale_retry_waiting"
+    UPSCALE_FAILED = "upscale_failed"
     DONE = "done"
     FAILED = "failed"
     TIMEOUT = "timeout"
@@ -108,6 +115,19 @@ class ChatGenerationTaskEventType(str, Enum):
     DOWNLOAD_FAILED = "DOWNLOAD_FAILED"
     DOWNLOAD_FAILED_NON_RETRYABLE = "DOWNLOAD_FAILED_NON_RETRYABLE"
 
+    UPSCALE_SNAPSHOT_MATCHED = "UPSCALE_SNAPSHOT_MATCHED"
+    UPSCALE_SNAPSHOT_BYPASSED = "UPSCALE_SNAPSHOT_BYPASSED"
+    UPSCALE_SOURCE_READY = "UPSCALE_SOURCE_READY"
+    UPSCALE_ENQUEUE = "UPSCALE_ENQUEUE"
+    UPSCALE_START = "UPSCALE_START"
+    UPSCALE_REMOTE_SUBMIT = "UPSCALE_REMOTE_SUBMIT"
+    UPSCALE_REMOTE_POLL = "UPSCALE_REMOTE_POLL"
+    UPSCALE_REMOTE_RESULT_READY = "UPSCALE_REMOTE_RESULT_READY"
+    UPSCALE_RETRY_WAITING = "UPSCALE_RETRY_WAITING"
+    UPSCALE_SUCCESS = "UPSCALE_SUCCESS"
+    UPSCALE_FAILED = "UPSCALE_FAILED"
+    UPSCALE_RECOVERY_ENQUEUE = "UPSCALE_RECOVERY_ENQUEUE"
+
     DOWNLOAD_SKIP_TASK_MISSING = "DOWNLOAD_SKIP_TASK_MISSING"
     DOWNLOAD_SKIP_INVALID_MODE = "DOWNLOAD_SKIP_INVALID_MODE"
     DOWNLOAD_SKIP_NOT_GENERATING = "DOWNLOAD_SKIP_NOT_GENERATING"
@@ -149,6 +169,7 @@ FINAL_CHAT_GENERATION_STAGES = {
     ChatGenerationPipelineStage.FAILED.value,
     ChatGenerationPipelineStage.TIMEOUT.value,
     ChatGenerationPipelineStage.DOWNLOAD_FAILED.value,
+    ChatGenerationPipelineStage.UPSCALE_FAILED.value,
 }
 
 DOWNLOAD_RECOVERABLE_STAGES = {
diff --git a/video-gen-api/app/enums/video_upscale.py b/video-gen-api/app/enums/video_upscale.py
new file mode 100644
index 00000000..ec77be64
--- /dev/null
+++ b/video-gen-api/app/enums/video_upscale.py
@@ -0,0 +1,97 @@
+from __future__ import annotations
+
+from enum import Enum
+
+
+VIDEO_UPSCALE_CONFIG_KEY = "video_upscale_config"
+VIDEO_UPSCALE_CONFIG_DESCRIPTION = "视频生成超分全局配置"
+VIDEO_UPSCALE_CONFIG_VERSION = 1
+VIDEO_UPSCALE_SOURCE_RETAINED_MARKER = "retained_by_snapshot_config"
+
+
+class VideoUpscaleProcessorKey(str, Enum):
+    LOCAL_FFMPEG_CROP_V1 = "local_ffmpeg_crop_v1"
+    VOLC_LARGE_MODEL_V1 = "volc_large_model_v1"
+    VOLC_STANDARD_V1 = "volc_standard_v1"
+    VOLC_PROFESSIONAL_V1 = "volc_professional_v1"
+
+
+class VideoUpscaleTaskStatus(str, Enum):
+    PENDING = "pending"
+    PROCESSING = "processing"
+    RETRY_WAITING = "retry_waiting"
+    COMPLETED = "completed"
+    FAILED = "failed"
+
+
+class VideoUpscaleStage(str, Enum):
+    QUEUED = "upscale_queued"
+    SOURCE_READY = "upscale_source_ready"
+    LOCAL_PROCESSING = "upscale_local_processing"
+    REMOTE_SUBMITTING = "upscale_remote_submitting"
+    REMOTE_POLLING = "upscale_remote_polling"
+    RESULT_READY = "upscale_result_ready"
+    RESULT_DOWNLOADING = "upscale_result_downloading"
+    VALIDATING = "upscale_validating"
+    GENERATING_COVER = "upscale_generating_cover"
+    FINALIZING = "upscale_finalizing"
+    RETRY_WAITING = "upscale_retry_waiting"
+    COMPLETED = "upscale_completed"
+    FAILED = "upscale_failed"
+
+
+class VideoUpscaleInputSourceType(str, Enum):
+    PROVIDER_REMOTE = "provider_remote"
+    LOCAL_SIGNED = "local_signed"
+
+
+class VideoUpscaleProbeStatus(str, Enum):
+    NOT_CHECKED = "not_checked"
+    SUCCESS = "success"
+    FAILED = "failed"
+    EXPIRED = "expired"
+    UNPARSABLE = "unparsable"
+
+
+VIDEO_UPSCALE_RESOLUTIONS = ("480p", "720p", "1080p", "2K", "4K")
+VIDEO_UPSCALE_RESOLUTION_SHORT_EDGE = {
+    "480p": 480,
+    "720p": 720,
+    "1080p": 1080,
+    "2K": 1440,
+    "4K": 2160,
+}
+VIDEO_UPSCALE_RESOLUTION_RANK = {
+    resolution: index for index, resolution in enumerate(VIDEO_UPSCALE_RESOLUTIONS, start=1)
+}
+
+
+def normalize_video_upscale_resolution(value: str | None) -> str:
+    text = str(value or "").strip()
+    normalized = text.lower()
+    aliases = {
+        "480p": "480p",
+        "720p": "720p",
+        "1080p": "1080p",
+        "2k": "2K",
+        "4k": "4K",
+    }
+    return aliases.get(normalized, text)
+
+
+def video_upscale_short_edge_pixels(value: str | None) -> int:
+    normalized = normalize_video_upscale_resolution(value)
+    try:
+        return VIDEO_UPSCALE_RESOLUTION_SHORT_EDGE[normalized]
+    except KeyError as exc:
+        supported = "、".join(VIDEO_UPSCALE_RESOLUTIONS)
+        raise ValueError(f"不支持的视频超分分辨率: {value}，仅支持 {supported}") from exc
+
+
+LOCAL_PROCESSOR_KEYS = {VideoUpscaleProcessorKey.LOCAL_FFMPEG_CROP_V1.value}
+REMOTE_PROCESSOR_KEYS = {
+    VideoUpscaleProcessorKey.VOLC_LARGE_MODEL_V1.value,
+    VideoUpscaleProcessorKey.VOLC_STANDARD_V1.value,
+    VideoUpscaleProcessorKey.VOLC_PROFESSIONAL_V1.value,
+}
+ALL_PROCESSOR_KEYS = LOCAL_PROCESSOR_KEYS | REMOTE_PROCESSOR_KEYS
diff --git a/video-gen-api/app/models/__init__.py b/video-gen-api/app/models/__init__.py
index 2d5744ba..25a6481a 100644
--- a/video-gen-api/app/models/__init__.py
+++ b/video-gen-api/app/models/__init__.py
@@ -21,6 +21,7 @@ from app.models.operation_log import OperationLog
 from app.models.chat_generation_task import ChatGenerationTask
 from app.models.chat_generation_task_event import ChatGenerationTaskEvent
 from app.models.chat_provider_call_log import ChatProviderCallLog
+from app.models.video_upscale_task import VideoUpscaleTask
 from app.models.generated_resource import GeneratedResource
 from app.models.upload_resource import UploadResource
 from app.models.user_resource_month_stat import UserResourceMonthStat
@@ -44,7 +45,7 @@ __all__ = [
     "ModelConfig", "SystemConfig", "Notification", "PaymentOrder",
     "TokenUsage", "IndustryConfig", "VideoEngine", "CreditRatio",
     "MenuConfig", "RechargePackage", "OperationLog", "ContactRequest",
-    "ChatGenerationTask", "ChatGenerationTaskEvent", "ChatProviderCallLog",
+    "ChatGenerationTask", "ChatGenerationTaskEvent", "ChatProviderCallLog", "VideoUpscaleTask",
     "GeneratedResource", "UploadResource", "UserResourceMonthStat", "UserResourceTotalStat",
     "UserResourceCapacityConfig",
     "ModuleGenerationProject", "ModuleGenerationStep",
diff --git a/video-gen-api/app/models/chat_generation_task.py b/video-gen-api/app/models/chat_generation_task.py
index 2d5adef4..0fbc382c 100644
--- a/video-gen-api/app/models/chat_generation_task.py
+++ b/video-gen-api/app/models/chat_generation_task.py
@@ -1,6 +1,6 @@
 from datetime import datetime
 
-from sqlalchemy import CheckConstraint, DateTime, Float, ForeignKey, Index, Integer, String, Text, text
+from sqlalchemy import Boolean, CheckConstraint, DateTime, Float, ForeignKey, Index, Integer, String, Text, text
 from sqlalchemy.orm import Mapped, mapped_column
 
 from app.models.base import Base, TimestampMixin, SoftDeleteMixin
@@ -76,6 +76,9 @@ class ChatGenerationTask(Base, TimestampMixin, SoftDeleteMixin):
     duration: Mapped[int | None] = mapped_column(Integer, nullable=True)
     aspect_ratio: Mapped[str | None] = mapped_column(String(8), nullable=True)
     resolution: Mapped[str | None] = mapped_column(String(8), nullable=True)
+    provider_generation_resolution: Mapped[str | None] = mapped_column(String(16), nullable=True)
+    video_upscale_enabled_snapshot: Mapped[bool] = mapped_column(Boolean, nullable=False, default=False, server_default="false")
+    video_upscale_snapshot_json: Mapped[str | None] = mapped_column(Text, nullable=True)
     image_size: Mapped[str | None] = mapped_column(String(16), nullable=True)
     image_proportion: Mapped[str | None] = mapped_column(String(8), nullable=True)
     image_px: Mapped[str | None] = mapped_column(String(16), nullable=True)
diff --git a/video-gen-api/app/models/generation_record.py b/video-gen-api/app/models/generation_record.py
index 0aa585eb..31b58139 100644
--- a/video-gen-api/app/models/generation_record.py
+++ b/video-gen-api/app/models/generation_record.py
@@ -1,6 +1,6 @@
 from datetime import datetime
 
-from sqlalchemy import DateTime, ForeignKey, Integer, String, Text, Float, Index
+from sqlalchemy import Boolean, DateTime, ForeignKey, Integer, String, Text, Float, Index
 from sqlalchemy.orm import Mapped, mapped_column
 
 from app.models.base import Base, TimestampMixin, SoftDeleteMixin
@@ -22,11 +22,17 @@ class GenerationRecord(Base, TimestampMixin, SoftDeleteMixin):
     duration: Mapped[int | None] = mapped_column(Integer, nullable=True)
     aspect_ratio: Mapped[str | None] = mapped_column(String(8), nullable=True)
     resolution: Mapped[str | None] = mapped_column(String(8), nullable=True)
+    provider_generation_resolution: Mapped[str | None] = mapped_column(String(16), nullable=True)
+    video_upscale_enabled_snapshot: Mapped[bool] = mapped_column(
+        Boolean, nullable=False, default=False, server_default="false"
+    )
+    video_upscale_snapshot_json: Mapped[str | None] = mapped_column(Text, nullable=True)
     image_size: Mapped[str | None] = mapped_column(String(8), nullable=True)
     image_proportion: Mapped[str | None] = mapped_column(String(8), nullable=True)
     image_px: Mapped[str | None] = mapped_column(String(10), nullable=True)
 
     status: Mapped[str] = mapped_column(String(32), default="prompt_optimized")
+    pipeline_stage: Mapped[str | None] = mapped_column(String(48), nullable=True, index=True)
     video_url: Mapped[str | None] = mapped_column(String(512), nullable=True)
     video_cover_url: Mapped[str | None] = mapped_column(String(512), nullable=True)
     image_url: Mapped[str | None] = mapped_column(String(512), nullable=True)
diff --git a/video-gen-api/app/models/video_upscale_task.py b/video-gen-api/app/models/video_upscale_task.py
new file mode 100644
index 00000000..4344748d
--- /dev/null
+++ b/video-gen-api/app/models/video_upscale_task.py
@@ -0,0 +1,85 @@
+from __future__ import annotations
+
+from datetime import datetime
+
+from sqlalchemy import BigInteger, CheckConstraint, DateTime, Float, ForeignKey, Index, Integer, String, Text
+from sqlalchemy.orm import Mapped, mapped_column
+
+from app.models.base import Base, TimestampMixin
+
+
+class VideoUpscaleTask(Base, TimestampMixin):
+    __tablename__ = "video_upscale_tasks"
+    __table_args__ = (
+        CheckConstraint(
+            "(chat_generation_task_id IS NOT NULL AND generation_record_id IS NULL) OR "
+            "(chat_generation_task_id IS NULL AND generation_record_id IS NOT NULL)",
+            name="ck_video_upscale_tasks_exactly_one_owner",
+        ),
+        Index("uq_video_upscale_tasks_chat_task", "chat_generation_task_id", unique=True),
+        Index("uq_video_upscale_tasks_generation_record", "generation_record_id", unique=True),
+        Index("idx_video_upscale_tasks_provider_task_id", "provider_task_id"),
+        Index("idx_video_upscale_tasks_status_next_retry", "status", "next_retry_at"),
+        Index("idx_video_upscale_tasks_status_lease", "status", "lease_until"),
+    )
+
+    id: Mapped[str] = mapped_column(String(32), primary_key=True)
+    chat_generation_task_id: Mapped[str | None] = mapped_column(
+        String(32),
+        ForeignKey("chat_generation_tasks.id", ondelete="CASCADE"),
+        nullable=True,
+    )
+    generation_record_id: Mapped[str | None] = mapped_column(
+        String(32),
+        ForeignKey("generation_records.id", ondelete="CASCADE"),
+        nullable=True,
+    )
+
+    status: Mapped[str] = mapped_column(String(32), nullable=False, default="pending", server_default="pending")
+    stage: Mapped[str] = mapped_column(String(48), nullable=False, default="upscale_queued", server_default="upscale_queued")
+    processor_key: Mapped[str] = mapped_column(String(64), nullable=False)
+    attempt_count: Mapped[int] = mapped_column(Integer, nullable=False, default=0, server_default="0")
+    failure_count: Mapped[int] = mapped_column(Integer, nullable=False, default=0, server_default="0")
+    manual_retry_count: Mapped[int] = mapped_column(Integer, nullable=False, default=0, server_default="0")
+    next_retry_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
+    last_error: Mapped[str | None] = mapped_column(Text, nullable=True)
+
+    source_local_path: Mapped[str | None] = mapped_column(Text, nullable=True)
+    source_file_size_bytes: Mapped[int] = mapped_column(BigInteger, nullable=False, default=0, server_default="0")
+    source_width: Mapped[int | None] = mapped_column(Integer, nullable=True)
+    source_height: Mapped[int | None] = mapped_column(Integer, nullable=True)
+    source_duration_seconds: Mapped[float | None] = mapped_column(Float, nullable=True)
+
+    source_deleted_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
+    source_delete_error: Mapped[str | None] = mapped_column(Text, nullable=True)
+
+    source_remote_url: Mapped[str | None] = mapped_column(Text, nullable=True)
+    source_remote_url_signed_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
+    source_remote_url_expires_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
+    source_remote_url_last_probe_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
+    source_remote_url_probe_status: Mapped[str | None] = mapped_column(String(32), nullable=True)
+    input_source_type: Mapped[str | None] = mapped_column(String(32), nullable=True)
+    input_source_fallback_count: Mapped[int] = mapped_column(Integer, nullable=False, default=0, server_default="0")
+
+    target_width: Mapped[int] = mapped_column(Integer, nullable=False)
+    target_height: Mapped[int] = mapped_column(Integer, nullable=False)
+    effective_target_width: Mapped[int | None] = mapped_column(Integer, nullable=True)
+    effective_target_height: Mapped[int | None] = mapped_column(Integer, nullable=True)
+
+    provider_task_id: Mapped[str | None] = mapped_column(String(160), nullable=True)
+    provider_request_json: Mapped[str | None] = mapped_column(Text, nullable=True)
+    provider_response_json: Mapped[str | None] = mapped_column(Text, nullable=True)
+    provider_output_url: Mapped[str | None] = mapped_column(Text, nullable=True)
+    provider_output_url_expires_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
+    provider_submitted_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
+
+    final_local_path: Mapped[str | None] = mapped_column(Text, nullable=True)
+    final_resource_url: Mapped[str | None] = mapped_column(Text, nullable=True)
+    final_file_size_bytes: Mapped[int] = mapped_column(BigInteger, nullable=False, default=0, server_default="0")
+
+    celery_task_id: Mapped[str | None] = mapped_column(String(160), nullable=True)
+    lease_token: Mapped[str | None] = mapped_column(String(64), nullable=True)
+    lease_until: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
+    started_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
+    completed_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
+    failed_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
diff --git a/video-gen-api/app/schemas/generation.py b/video-gen-api/app/schemas/generation.py
index fca8db5c..e2b54df7 100644
--- a/video-gen-api/app/schemas/generation.py
+++ b/video-gen-api/app/schemas/generation.py
@@ -50,6 +50,8 @@ class GenerationRecordOut(BaseModel):
     image_proportion: str | None = None
     image_px: str | None = None
     status: str
+    pipeline_stage: str | None = None
+    video_upscale_enabled: bool = False
     video_url: str | None = None
     video_cover_url: str | None = None
     image_url: str | None = None
diff --git a/video-gen-api/app/schemas/video_upscale.py b/video-gen-api/app/schemas/video_upscale.py
new file mode 100644
index 00000000..fd08642c
--- /dev/null
+++ b/video-gen-api/app/schemas/video_upscale.py
@@ -0,0 +1,59 @@
+from __future__ import annotations
+
+from pydantic import BaseModel, ConfigDict, Field, field_validator, model_validator
+
+from app.enums.video_upscale import normalize_video_upscale_resolution
+from app.schemas.common import NaiveDatetimeOptional
+
+
+class VideoUpscaleResolutionRule(BaseModel):
+    model_config = ConfigDict(extra="forbid")
+
+    target_resolution: str = Field(..., min_length=1, max_length=16)
+    provider_generation_resolution: str = Field(..., min_length=1, max_length=16)
+    processor_key: str = Field(..., min_length=1, max_length=64)
+    enabled: bool = True
+
+    @field_validator("target_resolution", "provider_generation_resolution")
+    @classmethod
+    def clean_resolution(cls, value: str) -> str:
+        return normalize_video_upscale_resolution(value)
+
+    @field_validator("processor_key")
+    @classmethod
+    def clean_processor_key(cls, value: str) -> str:
+        return str(value).strip()
+
+
+class VideoUpscaleConfigData(BaseModel):
+    model_config = ConfigDict(extra="forbid")
+
+    enabled: bool = False
+    version: int = Field(1, ge=1)
+    delete_source_after_success: bool = True
+    rules: list[VideoUpscaleResolutionRule] = Field(default_factory=list)
+
+    @model_validator(mode="after")
+    def validate_unique_rules(self) -> "VideoUpscaleConfigData":
+        seen: set[str] = set()
+        for rule in self.rules:
+            if not rule.enabled:
+                continue
+            if rule.target_resolution in seen:
+                raise ValueError(f"客户目标分辨率存在重复启用规则: {rule.target_resolution}")
+            seen.add(rule.target_resolution)
+        return self
+
+
+class VideoUpscaleConfigSaveRequest(BaseModel):
+    model_config = ConfigDict(extra="forbid")
+    data: VideoUpscaleConfigData
+
+
+class VideoUpscaleConfigOut(BaseModel):
+    id: str | None = None
+    key: str
+    description: str | None = None
+    data: VideoUpscaleConfigData
+    created_at: NaiveDatetimeOptional = None
+    updated_at: NaiveDatetimeOptional = None
diff --git a/video-gen-api/app/services/generation/ai/task_create_service.py b/video-gen-api/app/services/generation/ai/task_create_service.py
index 3ae7bb29..804ded45 100644
--- a/video-gen-api/app/services/generation/ai/task_create_service.py
+++ b/video-gen-api/app/services/generation/ai/task_create_service.py
@@ -40,6 +40,7 @@ from app.services.generation.billing_service import OWNER_CHAT_GENERATION_TASK,
 from app.services.operation_log_service import log_operation_event
 from app.services.private_portrait.reference_resolver import resolve_private_portrait_references
 from app.services.resource_capacity_service import assert_user_resource_capacity_available
+from app.services.video_upscale.snapshot_service import build_video_upscale_snapshot
 from app.utils.id_gen import generate_id
 
 
@@ -331,7 +332,15 @@ async def create_generation_task_group(
             raise HTTPException(status_code=400, detail=f"视频时长不能超过 {engine.max_duration} 秒")
 
         input_video_duration = _validate_video_references(refs, max_audio_count=engine.max_audio_count)
+        provider_generation_resolution, upscale_enabled_snapshot, upscale_snapshot_json = await build_video_upscale_snapshot(
+            db,
+            target_resolution=resolution,
+            aspect_ratio=ratio,
+            supported_provider_resolutions=resolutions,
+        )
         video_snapshot = build_video_snapshot(engine, ratio, resolution, duration)
+        video_snapshot["provider_generation_resolution"] = provider_generation_resolution
+        video_snapshot["video_upscale_enabled_snapshot"] = upscale_enabled_snapshot
         video_snapshot["generation_count"] = generation_count
         snapshot_json = _json(video_snapshot) or "{}"
         deadline_at = now + timedelta(hours=settings.CHATAPI_ASYNC_VIDEO_FINAL_DEADLINE_HOURS)
@@ -370,6 +379,9 @@ async def create_generation_task_group(
                 duration=duration,
                 aspect_ratio=ratio,
                 resolution=resolution,
+                provider_generation_resolution=provider_generation_resolution,
+                video_upscale_enabled_snapshot=upscale_enabled_snapshot,
+                video_upscale_snapshot_json=upscale_snapshot_json,
                 image_size=req.image_size or IMAGE_DEFAULT_SIZE,
                 image_proportion=req.image_proportion or IMAGE_DEFAULT_PROPORTION,
                 image_px=normalize_px(req.image_px) or IMAGE_DEFAULT_PX,
@@ -394,6 +406,9 @@ async def create_generation_task_group(
                 duration=duration,
                 aspect_ratio=ratio,
                 resolution=resolution,
+                provider_generation_resolution=provider_generation_resolution,
+                video_upscale_enabled_snapshot=upscale_enabled_snapshot,
+                video_upscale_snapshot_json=upscale_snapshot_json,
                 image_size=req.image_size or IMAGE_DEFAULT_SIZE,
                 image_proportion=req.image_proportion or IMAGE_DEFAULT_PROPORTION,
                 image_px=normalize_px(req.image_px) or IMAGE_DEFAULT_PX,
@@ -438,6 +453,9 @@ async def create_generation_task_group(
                     duration=duration,
                     aspect_ratio=ratio,
                     resolution=resolution,
+                    provider_generation_resolution=provider_generation_resolution,
+                    video_upscale_enabled_snapshot=upscale_enabled_snapshot,
+                    video_upscale_snapshot_json=upscale_snapshot_json,
                     image_size=req.image_size or IMAGE_DEFAULT_SIZE,
                     image_proportion=req.image_proportion or IMAGE_DEFAULT_PROPORTION,
                     image_px=normalize_px(req.image_px) or IMAGE_DEFAULT_PX,
@@ -476,6 +494,8 @@ async def create_generation_task_group(
             "generation_count": generation_count,
             "child_task_ids": child_ids,
             "enqueue_task_ids": enqueue_ids,
+            "video_upscale_enabled_snapshot": bool(locals().get("upscale_enabled_snapshot", False)),
+            "provider_generation_resolution": locals().get("provider_generation_resolution"),
         },
     )
     return GenerationTaskCreateResult(
diff --git a/video-gen-api/app/services/generation/ai/task_group_service.py b/video-gen-api/app/services/generation/ai/task_group_service.py
index 8b525518..1e726d90 100644
--- a/video-gen-api/app/services/generation/ai/task_group_service.py
+++ b/video-gen-api/app/services/generation/ai/task_group_service.py
@@ -15,6 +15,7 @@ from app.enums.generation_task import (
 )
 from app.models.chat_generation_task import ChatGenerationTask
 from app.services.operation_log_service import log_operation_event
+from app.services.video_upscale.guard_service import assert_no_recoverable_failed_upscale_tasks
 from app.services.resource_accounting_service import (
     SOURCE_MODEL_CHAT_TASK,
     soft_delete_resources_by_source,
@@ -31,6 +32,12 @@ ACTIVE_STAGES = {
     ChatGenerationPipelineStage.DOWNLOAD_QUEUED.value,
     ChatGenerationPipelineStage.DOWNLOADING.value,
     ChatGenerationPipelineStage.RETRY_WAITING.value,
+    ChatGenerationPipelineStage.UPSCALE_QUEUED.value,
+    ChatGenerationPipelineStage.UPSCALE_PROCESSING.value,
+    ChatGenerationPipelineStage.UPSCALE_POLLING.value,
+    ChatGenerationPipelineStage.UPSCALE_DOWNLOADING.value,
+    ChatGenerationPipelineStage.UPSCALE_FINALIZING.value,
+    ChatGenerationPipelineStage.UPSCALE_RETRY_WAITING.value,
 }
 
 
@@ -46,6 +53,8 @@ def get_display_status(task: ChatGenerationTask) -> str:
         return "deleted"
     if task.pipeline_stage == ChatGenerationPipelineStage.DOWNLOAD_FAILED.value:
         return "download_failed"
+    if task.pipeline_stage == ChatGenerationPipelineStage.UPSCALE_FAILED.value:
+        return "failed"
     return task.status or ChatGenerationTaskStatus.PENDING.value
 
 
@@ -115,6 +124,7 @@ def _generation_result_status(task: ChatGenerationTask) -> str:
     if task.status == ChatGenerationTaskStatus.FAILED.value or (task.pipeline_stage or "") in {
         ChatGenerationPipelineStage.FAILED.value,
         ChatGenerationPipelineStage.TIMEOUT.value,
+        ChatGenerationPipelineStage.UPSCALE_FAILED.value,
     }:
         return "failed"
     if is_task_active(task):
@@ -177,6 +187,7 @@ async def aggregate_main_task_status(
                 ChatGenerationPipelineStage.FAILED.value,
                 ChatGenerationPipelineStage.TIMEOUT.value,
                 ChatGenerationPipelineStage.DOWNLOAD_FAILED.value,
+                ChatGenerationPipelineStage.UPSCALE_FAILED.value,
             }
         )
     ]
@@ -191,11 +202,12 @@ async def aggregate_main_task_status(
         main.error_message = _build_summary(children)
     elif failed_children:
         main.status = ChatGenerationTaskStatus.FAILED.value
-        main.pipeline_stage = (
-            ChatGenerationPipelineStage.DOWNLOAD_FAILED.value
-            if any(child.pipeline_stage == ChatGenerationPipelineStage.DOWNLOAD_FAILED.value for child in failed_children)
-            else ChatGenerationPipelineStage.FAILED.value
-        )
+        if any(child.pipeline_stage == ChatGenerationPipelineStage.DOWNLOAD_FAILED.value for child in failed_children):
+            main.pipeline_stage = ChatGenerationPipelineStage.DOWNLOAD_FAILED.value
+        elif any(child.pipeline_stage == ChatGenerationPipelineStage.UPSCALE_FAILED.value for child in failed_children):
+            main.pipeline_stage = ChatGenerationPipelineStage.UPSCALE_FAILED.value
+        else:
+            main.pipeline_stage = ChatGenerationPipelineStage.FAILED.value
         main.generated_at = max(
             (child.generated_at for child in completed_children if child.generated_at),
             default=datetime.now(timezone.utc),
@@ -279,6 +291,7 @@ async def soft_delete_child_tasks_batch(
     running_ids = [child.id for child in active_children if is_task_active(child)]
     if running_ids:
         raise HTTPException(status_code=400, detail=f"仍有 {len(running_ids)} 个子任务生成中，暂不能删除")
+    await assert_no_recoverable_failed_upscale_tasks(db, [str(child.id) for child in active_children])
     if require_completed:
         invalid_ids = [
             child.id for child in active_children
@@ -381,6 +394,7 @@ async def soft_delete_top_level_task_group(
     if task.generation_mode == GenerationMode.CHATAPI_ASYNC.value:
         if is_task_active(task):
             raise HTTPException(status_code=400, detail="当前任务正在生成中，暂不能删除")
+        await assert_no_recoverable_failed_upscale_tasks(db, [str(task.id)])
         freed_size = await soft_delete_resources_by_source(
             db,
             source_model=SOURCE_MODEL_CHAT_TASK,
@@ -399,6 +413,7 @@ async def soft_delete_top_level_task_group(
 
     active_children = [child for child in children if child.deleted_at is None]
     child_ids = [child.id for child in active_children]
+    await assert_no_recoverable_failed_upscale_tasks(db, [str(child_id) for child_id in child_ids])
     freed_size = await soft_delete_resources_by_source(
         db,
         source_model=SOURCE_MODEL_CHAT_TASK,
diff --git a/video-gen-api/app/services/generation/download_service.py b/video-gen-api/app/services/generation/download_service.py
index bf3182ef..a41a9788 100644
--- a/video-gen-api/app/services/generation/download_service.py
+++ b/video-gen-api/app/services/generation/download_service.py
@@ -12,6 +12,7 @@ from app.services.provider_limit import provider_limit
 from app.services.resource_accounting_service import safe_file_size
 from app.services.video_cover_service import create_video_cover_for_local_video
 from app.services.video_gen import download_video
+from app.services.video_upscale.media_service import build_part_mp4_path, probe_video
 
 
 @dataclass(slots=True)
@@ -98,6 +99,45 @@ async def _download_video_atomically(remote_url: str, final_path: str) -> str:
         raise
 
 
+
+
+async def download_video_upscale_source(record: ChatGenerationTask) -> DownloadedGenerationResult:
+    """下载超分源视频。
+
+    源视频只供后处理使用，不生成封面，也不作为用户 GeneratedResource。
+    临时文件保持 .part.mp4 后缀，校验成功后原子重命名为 .source.mp4。
+    """
+    if not record.remote_result_url:
+        raise ValueError("缺少远程结果URL")
+
+    date_dir = _build_storage_date_dir(record)
+    dest_dir = os.path.join(settings.STORAGE_LOCAL_PATH, "_upscale_source", date_dir)
+    os.makedirs(dest_dir, exist_ok=True)
+    dest = os.path.join(dest_dir, f"{record.id}.source.mp4")
+
+    if not _is_valid_file(dest):
+        part_path = build_part_mp4_path(dest)
+        try:
+            async with provider_limit("result_download", settings.RESULT_DOWNLOAD_MAX_CONCURRENCY):
+                await download_video(record.remote_result_url, part_path)
+            if not _is_valid_file(part_path):
+                raise RuntimeError("超分源视频下载完成但临时文件为空")
+            await probe_video(part_path)
+            os.replace(part_path, dest)
+        except Exception:
+            _safe_remove(part_path)
+            raise
+    else:
+        await probe_video(dest)
+
+    return DownloadedGenerationResult(
+        url=f"/generate/videos/_upscale_source/{date_dir}/{record.id}.source.mp4",
+        storage_path=dest,
+        file_size_bytes=safe_file_size(dest),
+        resource_type="video",
+    )
+
+
 async def download_generation_result(record: ChatGenerationTask) -> DownloadedGenerationResult:
     if not record.remote_result_url:
         raise ValueError("缺少远程结果URL")
diff --git a/video-gen-api/app/services/generation/history_delete_service.py b/video-gen-api/app/services/generation/history_delete_service.py
index 839a4b6b..62c64c99 100644
--- a/video-gen-api/app/services/generation/history_delete_service.py
+++ b/video-gen-api/app/services/generation/history_delete_service.py
@@ -28,6 +28,7 @@ from app.services.module_generation_flow_base_service import is_active_chat_gene
 from app.services.module_generation_log_service import log_module_event_file
 from app.services.operation_log_service import log_operation_event
 # from app.services.operation_log import log_operation
+from app.services.video_upscale.guard_service import assert_no_recoverable_failed_upscale_tasks
 from app.services.resource_accounting_service import (
     SOURCE_MODEL_CHAT_TASK,
     SOURCE_MODEL_SHOT_SEGMENT,
@@ -204,6 +205,10 @@ async def _delete_generation_records(
     )
     records = list(result.scalars().all())
     _raise_missing_if_any(ids=ids, found_ids=[record.id for record in records], message="项目生成记录不存在或已删除")
+    await assert_no_recoverable_failed_upscale_tasks(
+        db,
+        generation_record_ids=[str(record.id) for record in records],
+    )
 
     invalid_ids = [
         record.id
@@ -251,6 +256,8 @@ async def _delete_chat_tasks(
     already_deleted_ids = [str(task.id) for task in tasks if task.deleted_at is not None]
     _raise_invalid_if_any(invalid_ids=already_deleted_ids, message="AI 创作记录不存在或已删除", status_code=404)
 
+    await assert_no_recoverable_failed_upscale_tasks(db, [str(task.id) for task in tasks])
+
     invalid_ids = [
         task.id
         for task in tasks
@@ -359,6 +366,7 @@ async def _soft_delete_module_projects(
     _assert_no_active_chat_tasks(task_map.values())
 
     chat_task_ids = list(task_map.keys())
+    await assert_no_recoverable_failed_upscale_tasks(db, chat_task_ids)
     freed_size = await soft_delete_resources_by_source(
         db,
         source_model=SOURCE_MODEL_CHAT_TASK,
diff --git a/video-gen-api/app/services/generation/recovery_service.py b/video-gen-api/app/services/generation/recovery_service.py
index d133f99c..e99fad34 100644
--- a/video-gen-api/app/services/generation/recovery_service.py
+++ b/video-gen-api/app/services/generation/recovery_service.py
@@ -412,6 +412,12 @@ async def recover_one_generation_task(
         await _remove_poll_active(task.id)
         return "clean_not_generating"
 
+    if bool(getattr(task, "video_upscale_enabled_snapshot", False)) and str(task.pipeline_stage or "").startswith("upscale_"):
+        # 原视频已经进入超分流水线，后续由 video_upscale 恢复扫描处理。
+        # 这里禁止再次投递原结果下载，避免覆盖保留的 source.mp4 或提前生成用户资源。
+        await _remove_poll_active(task.id)
+        return "delegate_video_upscale_recovery"
+
     has_remote_result = bool(str(task.remote_result_url or "").strip())
     has_provider_task_id = bool(str(task.provider_task_id or "").strip() or str(task.seedance_task_id or "").strip())
     is_deadline_expired = bool(task.deadline_at and _is_expired(task.deadline_at, current_time))
diff --git a/video-gen-api/app/services/generation/task_factory_service.py b/video-gen-api/app/services/generation/task_factory_service.py
index 32132b59..7214adc5 100644
--- a/video-gen-api/app/services/generation/task_factory_service.py
+++ b/video-gen-api/app/services/generation/task_factory_service.py
@@ -27,6 +27,7 @@ from app.services.generation.ai.engine_service import (
 )
 from app.services.generation.billing_service import OWNER_CHAT_GENERATION_TASK, charge_generation_media_by_params
 from app.services.resource_capacity_service import assert_user_resource_capacity_available
+from app.services.video_upscale.snapshot_service import build_video_upscale_snapshot
 from app.services.private_portrait.reference_resolver import resolve_private_portrait_references
 from app.utils.id_gen import generate_id
 
@@ -164,6 +165,12 @@ async def create_chat_generation_task_for_module(
             raise HTTPException(status_code=400, detail=f"视频时长不支持: {selected_duration}")
         if engine.max_duration and selected_duration > engine.max_duration:
             raise HTTPException(status_code=400, detail=f"视频时长不能超过 {engine.max_duration} 秒")
+        provider_generation_resolution, upscale_enabled_snapshot, upscale_snapshot_json = await build_video_upscale_snapshot(
+            db,
+            target_resolution=selected_resolution,
+            aspect_ratio=ratio,
+            supported_provider_resolutions=resolutions,
+        )
         media_billing = await charge_generation_media_by_params(
             db,
             user_id=current_user.id,
@@ -184,6 +191,8 @@ async def create_chat_generation_task_for_module(
         )
         snapshot = _build_video_snapshot(engine, ratio, selected_resolution, selected_duration)
         snapshot["generation_count"] = 1
+        snapshot["provider_generation_resolution"] = provider_generation_resolution
+        snapshot["video_upscale_enabled_snapshot"] = upscale_enabled_snapshot
         task = ChatGenerationTask(
             id=task_id,
             user_id=current_user.id,
@@ -193,6 +202,9 @@ async def create_chat_generation_task_for_module(
             duration=selected_duration,
             aspect_ratio=ratio,
             resolution=selected_resolution,
+            provider_generation_resolution=provider_generation_resolution,
+            video_upscale_enabled_snapshot=upscale_enabled_snapshot,
+            video_upscale_snapshot_json=upscale_snapshot_json,
             image_size=image_size or IMAGE_DEFAULT_SIZE,
             image_proportion=image_proportion or IMAGE_DEFAULT_PROPORTION,
             image_px=normalize_px(image_px) or IMAGE_DEFAULT_PX,
diff --git a/video-gen-api/app/services/module_generation_flow_base_service.py b/video-gen-api/app/services/module_generation_flow_base_service.py
index 0db913e5..c6849849 100644
--- a/video-gen-api/app/services/module_generation_flow_base_service.py
+++ b/video-gen-api/app/services/module_generation_flow_base_service.py
@@ -242,6 +242,12 @@ ACTIVE_CHAT_TASK_BLOCK_STAGES = {
     ChatGenerationPipelineStage.DOWNLOAD_QUEUED.value,
     ChatGenerationPipelineStage.DOWNLOADING.value,
     ChatGenerationPipelineStage.RETRY_WAITING.value,
+    ChatGenerationPipelineStage.UPSCALE_QUEUED.value,
+    ChatGenerationPipelineStage.UPSCALE_PROCESSING.value,
+    ChatGenerationPipelineStage.UPSCALE_POLLING.value,
+    ChatGenerationPipelineStage.UPSCALE_DOWNLOADING.value,
+    ChatGenerationPipelineStage.UPSCALE_FINALIZING.value,
+    ChatGenerationPipelineStage.UPSCALE_RETRY_WAITING.value,
 }
 
 
diff --git a/video-gen-api/app/services/video_gen.py b/video-gen-api/app/services/video_gen.py
index dc587de0..41469b03 100644
--- a/video-gen-api/app/services/video_gen.py
+++ b/video-gen-api/app/services/video_gen.py
@@ -148,7 +148,7 @@ async def submit_video_task(
         "content": content,
         "ratio": record.aspect_ratio,
         "duration": record.duration,
-        "resolution": record.resolution,
+        "resolution": getattr(record, "provider_generation_resolution", None) or record.resolution,
         "generate_audio": True,
         "watermark": False,
     }
diff --git a/video-gen-api/app/services/video_queue.py b/video-gen-api/app/services/video_queue.py
index e48889c1..da756939 100644
--- a/video-gen-api/app/services/video_queue.py
+++ b/video-gen-api/app/services/video_queue.py
@@ -2,123 +2,241 @@ import asyncio
 import json
 import logging
 import os
-from datetime import datetime
+from datetime import datetime, timezone
 
-from sqlalchemy import select
+from sqlalchemy import or_, select
 
+from app.config import settings
+from app.enums.generation_status import GenerationRecordPipelineStage
 from app.models.base import async_session
 from app.models.generation_record import GenerationRecord
-from app.services.video_gen import get_active_engine, poll_task_status, download_video, _log_video_response
-from app.services.image_gen import get_active_image_engine, download_image
+from app.services.generation.refund_service import mark_generation_record_failed_and_refund_once
+from app.services.image_gen import download_image, get_active_image_engine
 from app.services.media_token_usage_snapshot_service import sync_generation_record_media_token_snapshot
+from app.services.provider_limit import provider_limit
 from app.services.resource_accounting_service import (
     record_generation_record_generated_resource,
     safe_file_size,
 )
 from app.services.video_cover_service import create_video_cover_for_local_video
-from app.config import settings
-from app.services.generation.refund_service import mark_generation_record_failed_and_refund_once
+from app.services.video_gen import _log_video_response, download_video, get_active_engine, poll_task_status
+from app.services.video_upscale.media_service import build_part_mp4_path, probe_video, safe_remove
 
 logger = logging.getLogger("videogen")
 
-POLL_INTERVAL = 30  # seconds between polls
-MAX_POLLS = 60      # max 30 minutes total
+POLL_INTERVAL = 30
+MAX_POLLS = 60
+
+_PROVIDER_RECOVERABLE_STAGES = {
+    None,
+    "",
+    GenerationRecordPipelineStage.CREATING_PROVIDER_TASK.value,
+    GenerationRecordPipelineStage.WAITING_REMOTE.value,
+    GenerationRecordPipelineStage.POLLING.value,
+    GenerationRecordPipelineStage.RESULT_READY.value,
+    GenerationRecordPipelineStage.DOWNLOADING.value,
+}
+
+
+def _is_provider_stage(record: GenerationRecord) -> bool:
+    return (record.pipeline_stage or "") in _PROVIDER_RECOVERABLE_STAGES
+
+
+def _source_date_dir(record: GenerationRecord) -> str:
+    created = record.created_at
+    if created is None:
+        created = datetime.now(timezone.utc)
+    return created.strftime("%Y/%m/%d")
+
+
+async def _download_generation_record_upscale_source(
+    record: GenerationRecord,
+    remote_url: str,
+) -> tuple[str, int]:
+    date_dir = _source_date_dir(record)
+    dest_dir = os.path.join(settings.STORAGE_LOCAL_PATH, "_upscale_source", date_dir)
+    os.makedirs(dest_dir, exist_ok=True)
+    final_path = os.path.join(dest_dir, f"{record.id}.source.mp4")
+    if os.path.isfile(final_path) and os.path.getsize(final_path) > 0:
+        await probe_video(final_path)
+        return final_path, safe_file_size(final_path)
+
+    part_path = build_part_mp4_path(final_path)
+    try:
+        async with provider_limit("result_download", settings.RESULT_DOWNLOAD_MAX_CONCURRENCY):
+            await download_video(remote_url, part_path)
+        if not os.path.isfile(part_path) or os.path.getsize(part_path) <= 0:
+            raise RuntimeError("超分源视频下载完成但临时文件为空")
+        await probe_video(part_path)
+        os.replace(part_path, final_path)
+        return final_path, safe_file_size(final_path)
+    except Exception:
+        safe_remove(part_path)
+        raise
+
+
+async def handle_generation_record_video_succeeded(
+    db,
+    record: GenerationRecord,
+    *,
+    remote_url: str,
+    provider_response: dict | None,
+    video_tokens: int = 0,
+) -> bool:
+    """处理 GenerationRecord 原视频生成成功。
+
+    返回 True 表示已进入超分队列；False 表示按原流程直接完成。
+    """
+    record.video_tokens_used = int(video_tokens or 0)
+    await sync_generation_record_media_token_snapshot(db, record, provider_response=provider_response or {})
+
+    if bool(record.video_upscale_enabled_snapshot) and record.video_upscale_snapshot_json:
+        record.pipeline_stage = GenerationRecordPipelineStage.DOWNLOADING.value
+        await db.flush()
+        source_path, source_size = await _download_generation_record_upscale_source(record, remote_url)
+        from app.services.video_upscale.task_service import enqueue_upscale_task, prepare_video_upscale_task
+
+        upscale = await prepare_video_upscale_task(
+            db,
+            generation_record=record,
+            source_local_path=source_path,
+            source_file_size_bytes=source_size,
+            source_remote_url=remote_url,
+        )
+        # enqueue_upscale_task 会先提交数据库，再投递 Celery；投递失败由 gen_recovery 补投。
+        await enqueue_upscale_task(db, upscale=upscale, reason="generation_record_source_ready")
+        logger.info("GenerationRecord 已进入视频超分队列: record_id=%s upscale_task_id=%s", record.id, upscale.id)
+        return True
+
+    storage_path = None
+    file_size_bytes = 0
+    if settings.STORAGE_TYPE == "local" and remote_url:
+        try:
+            date_dir = _source_date_dir(record)
+            dest_dir = os.path.join(settings.STORAGE_LOCAL_PATH, date_dir)
+            os.makedirs(dest_dir, exist_ok=True)
+            dest = os.path.join(dest_dir, f"{record.id}.mp4")
+            await download_video(remote_url, dest)
+            record.video_url = f"/generate/videos/{date_dir}/{record.id}.mp4"
+            cover_url, _cover_storage_path = create_video_cover_for_local_video(
+                record_id=record.id,
+                video_path=dest,
+                date_dir=date_dir,
+                log_prefix=f"GenerationRecord视频封面生成 record_id={record.id}",
+            )
+            record.video_cover_url = cover_url
+            storage_path = dest
+            file_size_bytes = safe_file_size(dest)
+        except Exception as exc:
+            logger.warning("GenerationRecord 最终视频本地保存失败，回退远程地址: record_id=%s error=%s", record.id, exc)
+            record.video_url = remote_url
+    else:
+        record.video_url = remote_url
+
+    record.status = "completed"
+    record.pipeline_stage = GenerationRecordPipelineStage.DONE.value
+    record.generated_at = datetime.now(timezone.utc)
+    record.error_message = None
+    if record.video_url:
+        await record_generation_record_generated_resource(
+            db,
+            record,
+            resource_url=record.video_url,
+            storage_path=storage_path,
+            file_size_bytes=file_size_bytes,
+            remote_url=remote_url,
+            generated_at=record.generated_at,
+        )
+    await db.commit()
+    return False
 
 
 class TaskQueue:
     def __init__(self):
         self.queue: asyncio.Queue[str] = asyncio.Queue()
         self.running = False
-        self._active: dict[str, int] = {}  # record_id -> poll count
+        self._active: dict[str, int] = {}
 
     async def enqueue(self, record_id: str):
-        """Add a record to the polling queue."""
         await self.queue.put(record_id)
 
     async def recover(self):
-        """Recover in-progress tasks from DB on startup."""
         async with async_session() as db:
             result = await db.execute(
                 select(GenerationRecord).where(
                     GenerationRecord.status == "generating",
                     GenerationRecord.seedance_task_id.isnot(None),
                     GenerationRecord.deleted_at.is_(None),
+                    or_(
+                        GenerationRecord.pipeline_stage.is_(None),
+                        GenerationRecord.pipeline_stage.in_(
+                            [stage for stage in _PROVIDER_RECOVERABLE_STAGES if stage]
+                        ),
+                    ),
                 )
             )
             records = result.scalars().all()
             for record in records:
                 await self.queue.put(record.id)
-                logger.info(f"Recovered task: {record.id} (seedance: {record.seedance_task_id})")
+                logger.info("Recovered task: %s (seedance: %s stage=%s)", record.id, record.seedance_task_id, record.pipeline_stage)
 
     async def run(self):
-        """Main polling loop."""
         self.running = True
         logger.info("Video queue started")
-
         while self.running:
             try:
                 record_id = await asyncio.wait_for(self.queue.get(), timeout=5.0)
             except asyncio.TimeoutError:
                 continue
-
             try:
                 await self._process(record_id)
-            except Exception as e:
-                logger.error(f"Error processing {record_id}: {e}")
+            except Exception as exc:
+                logger.exception("Error processing %s: %s", record_id, exc)
             finally:
                 self.queue.task_done()
-
         logger.info("Video queue stopped")
 
     async def _process(self, record_id: str):
-        """Process a single record: poll status and update DB."""
         async with async_session() as db:
             result = await db.execute(
                 select(GenerationRecord).where(
                     GenerationRecord.id == record_id,
                     GenerationRecord.deleted_at.is_(None),
-                )
-                .with_for_update()
-                .limit(1)
+                ).with_for_update().limit(1)
             )
             record = result.scalar_one_or_none()
             if not record or record.status != "generating":
                 return
-
             if record.gen_type == "video":
+                if not _is_provider_stage(record):
+                    return
                 await self._process_video(db, record)
             else:
                 await self._process_image(db, record)
 
-    async def _process_video(self, db, record):
-        """Process video generation task."""
+    async def _process_video(self, db, record: GenerationRecord):
         record_id = record.id
-        
         if not record.seedance_task_id:
-            await mark_generation_record_failed_and_refund_once(
-                db,
-                record=record,
-                error_message="缺少外部任务ID",
-            )
+            record.pipeline_stage = GenerationRecordPipelineStage.FAILED.value
+            await mark_generation_record_failed_and_refund_once(db, record=record, error_message="缺少外部任务ID")
             await db.commit()
             return
 
+        record.pipeline_stage = GenerationRecordPipelineStage.POLLING.value
         try:
             engine = await get_active_engine(db)
             poll_result = await poll_task_status(engine, record.seedance_task_id)
-        except Exception as e:
-            logger.error(f"Poll error for {record_id}: {e}")
+        except Exception as exc:
+            logger.error("Poll error for %s: %s", record_id, exc)
             count = self._active.get(record_id, 0) + 1
             self._active[record_id] = count
             if count >= MAX_POLLS:
-                await mark_generation_record_failed_and_refund_once(
-                    db,
-                    record=record,
-                    error_message=f"轮询超时: {e}",
-                )
+                record.pipeline_stage = GenerationRecordPipelineStage.FAILED.value
+                await mark_generation_record_failed_and_refund_once(db, record=record, error_message=f"轮询超时: {exc}")
                 await db.commit()
-                del self._active[record_id]
+                self._active.pop(record_id, None)
             else:
+                await db.commit()
                 await asyncio.sleep(POLL_INTERVAL)
                 await self.queue.put(record_id)
             return
@@ -128,54 +246,45 @@ class TaskQueue:
             resp_data = json.loads(poll_result.get("response_data", "{}"))
         except (json.JSONDecodeError, TypeError):
             resp_data = {}
-
         _log_video_response(record_id, resp_data, poll_result.get("error"))
 
         if status == "succeeded":
-            file_url = poll_result.get("video_url", "")
-            storage_path = None
-            file_size_bytes = 0
-            if settings.STORAGE_TYPE == "local" and file_url:
-                try:
-                    date_dir = datetime.now().strftime("%Y/%m/%d")
-                    dest_dir = os.path.join(settings.STORAGE_LOCAL_PATH, date_dir)
-                    os.makedirs(dest_dir, exist_ok=True)
-                    dest = os.path.join(dest_dir, f"{record_id}.mp4")
-                    await download_video(file_url, dest)
-                    record.video_url = f"/generate/videos/{date_dir}/{record_id}.mp4"
-                    cover_url, _cover_storage_path = create_video_cover_for_local_video(
-                        record_id=record_id,
-                        video_path=dest,
-                        date_dir=date_dir,
-                        log_prefix=f"GenerationRecord视频封面生成 record_id={record_id}",
-                    )
-                    record.video_cover_url = cover_url
-                    storage_path = dest
-                    file_size_bytes = safe_file_size(dest)
-                except Exception as e:
-                    logger.warning(f"Download failed, using remote URL: {e}")
-                    record.video_url = file_url
-            else:
-                record.video_url = file_url
-            record.video_tokens_used = poll_result.get("video_tokens", 0)
-            await sync_generation_record_media_token_snapshot(db, record, provider_response=resp_data)
-            record.status = "completed"
-            record.generated_at = datetime.now()
-            if record.video_url:
-                await record_generation_record_generated_resource(
+            file_url = str(poll_result.get("video_url") or "").strip()
+            if not file_url:
+                record.pipeline_stage = GenerationRecordPipelineStage.FAILED.value
+                await mark_generation_record_failed_and_refund_once(db, record=record, error_message="供应商成功但未返回视频地址")
+                await db.commit()
+                return
+            record.pipeline_stage = GenerationRecordPipelineStage.RESULT_READY.value
+            await db.flush()
+            try:
+                await handle_generation_record_video_succeeded(
                     db,
                     record,
-                    resource_url=record.video_url,
-                    storage_path=storage_path,
-                    file_size_bytes=file_size_bytes,
                     remote_url=file_url,
-                    generated_at=record.generated_at,
+                    provider_response=resp_data,
+                    video_tokens=poll_result.get("video_tokens", 0),
                 )
+            except Exception as exc:
+                await db.rollback()
+                result = await db.execute(
+                    select(GenerationRecord).where(GenerationRecord.id == record_id).with_for_update().limit(1)
+                )
+                failed_record = result.scalar_one_or_none()
+                if failed_record:
+                    failed_record.pipeline_stage = GenerationRecordPipelineStage.FAILED.value
+                    await mark_generation_record_failed_and_refund_once(
+                        db,
+                        record=failed_record,
+                        error_message=f"视频结果下载失败: {exc}",
+                    )
+                    await db.commit()
+                logger.exception("GenerationRecord 视频成功结果处理失败: %s", record_id)
             self._active.pop(record_id, None)
-            await db.commit()
-            logger.info(f"Video task completed: {record_id}")
+            return
 
-        elif status == "failed":
+        if status == "failed":
+            record.pipeline_stage = GenerationRecordPipelineStage.FAILED.value
             await mark_generation_record_failed_and_refund_once(
                 db,
                 record=record,
@@ -183,24 +292,21 @@ class TaskQueue:
             )
             self._active.pop(record_id, None)
             await db.commit()
-            logger.info(f"Video task failed: {record_id}")
+            logger.info("Video task failed: %s", record_id)
+            return
 
+        count = self._active.get(record_id, 0) + 1
+        self._active[record_id] = count
+        if count >= MAX_POLLS:
+            record.pipeline_stage = GenerationRecordPipelineStage.FAILED.value
+            await mark_generation_record_failed_and_refund_once(db, record=record, error_message="视频生成超时")
+            self._active.pop(record_id, None)
+            await db.commit()
+            logger.info("Video task timed out: %s", record_id)
         else:
-            count = self._active.get(record_id, 0) + 1
-            self._active[record_id] = count
-            if count >= MAX_POLLS:
-                await mark_generation_record_failed_and_refund_once(
-                    db,
-                    record=record,
-                    error_message="视频生成超时",
-                )
-                self._active.pop(record_id, None)
-                await db.commit()
-                logger.info(f"Video task timed out: {record_id}")
-            else:
-                await db.commit()
-                await asyncio.sleep(POLL_INTERVAL)
-                await self.queue.put(record_id)
+            await db.commit()
+            await asyncio.sleep(POLL_INTERVAL)
+            await self.queue.put(record_id)
 
     async def _process_image(self, db, record):
         """Process image generation task - calls API directly."""
diff --git a/video-gen-api/app/services/video_upscale/__init__.py b/video-gen-api/app/services/video_upscale/__init__.py
new file mode 100644
index 00000000..e69de29b
diff --git a/video-gen-api/app/services/video_upscale/config_service.py b/video-gen-api/app/services/video_upscale/config_service.py
new file mode 100644
index 00000000..5b9493ea
--- /dev/null
+++ b/video-gen-api/app/services/video_upscale/config_service.py
@@ -0,0 +1,175 @@
+from __future__ import annotations
+
+import json
+from typing import Any
+
+from fastapi import HTTPException
+from sqlalchemy import select
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from app.enums.video_upscale import (
+    ALL_PROCESSOR_KEYS,
+    VIDEO_UPSCALE_CONFIG_DESCRIPTION,
+    VIDEO_UPSCALE_CONFIG_KEY,
+    VIDEO_UPSCALE_CONFIG_VERSION,
+    VIDEO_UPSCALE_RESOLUTION_RANK,
+    VIDEO_UPSCALE_RESOLUTIONS,
+    VideoUpscaleProcessorKey,
+    normalize_video_upscale_resolution,
+)
+from app.models.system_config import SystemConfig
+from app.schemas.video_upscale import VideoUpscaleConfigData
+from app.utils.id_gen import generate_id
+
+
+def default_video_upscale_config() -> dict[str, Any]:
+    return {
+        "enabled": False,
+        "version": VIDEO_UPSCALE_CONFIG_VERSION,
+        "delete_source_after_success": True,
+        "rules": [],
+    }
+
+
+def _dump(data: dict[str, Any]) -> str:
+    return json.dumps(data, ensure_ascii=False, separators=(",", ":"), default=str)
+
+
+def _load(value: str | None) -> dict[str, Any]:
+    if not value:
+        return default_video_upscale_config()
+    try:
+        data = json.loads(value)
+    except Exception as exc:
+        raise HTTPException(status_code=500, detail=f"视频超分配置 JSON 损坏: {exc}") from exc
+    if not isinstance(data, dict):
+        raise HTTPException(status_code=500, detail="视频超分配置必须是 JSON 对象")
+    return data
+
+
+def _simplify_stored_config(data: dict[str, Any]) -> dict[str, Any]:
+    """兼容开发阶段已保存的旧页面配置，忽略 processors、比例和手工像素等多余字段。"""
+    rules: list[dict[str, Any]] = []
+    for raw_rule in data.get("rules") or []:
+        if not isinstance(raw_rule, dict):
+            continue
+        rules.append(
+            {
+                "target_resolution": raw_rule.get("target_resolution"),
+                "provider_generation_resolution": raw_rule.get("provider_generation_resolution"),
+                "processor_key": raw_rule.get("processor_key"),
+                "enabled": bool(raw_rule.get("enabled", True)),
+            }
+        )
+    return {
+        "enabled": bool(data.get("enabled", False)),
+        "version": max(1, int(data.get("version") or VIDEO_UPSCALE_CONFIG_VERSION)),
+        "delete_source_after_success": bool(data.get("delete_source_after_success", True)),
+        "rules": rules,
+    }
+
+
+async def _get_record(db: AsyncSession) -> SystemConfig | None:
+    result = await db.execute(select(SystemConfig).where(SystemConfig.key == VIDEO_UPSCALE_CONFIG_KEY).limit(1))
+    return result.scalar_one_or_none()
+
+
+def validate_video_upscale_config(data: dict[str, Any] | VideoUpscaleConfigData) -> dict[str, Any]:
+    raw = data.model_dump() if isinstance(data, VideoUpscaleConfigData) else _simplify_stored_config(dict(data))
+    try:
+        model = VideoUpscaleConfigData.model_validate(raw)
+    except Exception as exc:
+        raise HTTPException(status_code=400, detail=str(exc)) from exc
+
+    normalized = model.model_dump()
+    seen: set[str] = set()
+    for rule in normalized.get("rules") or []:
+        target = normalize_video_upscale_resolution(rule.get("target_resolution"))
+        provider_resolution = normalize_video_upscale_resolution(rule.get("provider_generation_resolution"))
+        processor_key = str(rule.get("processor_key") or "").strip()
+
+        if target not in VIDEO_UPSCALE_RESOLUTIONS:
+            raise HTTPException(
+                status_code=400,
+                detail=f"不支持的客户目标分辨率: {target}，仅支持 {'、'.join(VIDEO_UPSCALE_RESOLUTIONS)}",
+            )
+        if provider_resolution not in VIDEO_UPSCALE_RESOLUTIONS:
+            raise HTTPException(
+                status_code=400,
+                detail=f"不支持的实际生成分辨率: {provider_resolution}，仅支持 {'、'.join(VIDEO_UPSCALE_RESOLUTIONS)}",
+            )
+        if processor_key not in ALL_PROCESSOR_KEYS:
+            raise HTTPException(status_code=400, detail=f"未注册的超分处理器: {processor_key}")
+
+        rule["target_resolution"] = target
+        rule["provider_generation_resolution"] = provider_resolution
+        rule["processor_key"] = processor_key
+
+        if VIDEO_UPSCALE_RESOLUTION_RANK[provider_resolution] > VIDEO_UPSCALE_RESOLUTION_RANK[target]:
+            raise HTTPException(
+                status_code=400,
+                detail=f"规则 {target} 的实际生成分辨率 {provider_resolution} 不能高于客户目标分辨率",
+            )
+        if processor_key == VideoUpscaleProcessorKey.VOLC_LARGE_MODEL_V1.value:
+            if target not in {"720p", "1080p", "2K"}:
+                raise HTTPException(status_code=400, detail="火山画质增强大模型目标分辨率仅支持 720p、1080p、2K")
+            if VIDEO_UPSCALE_RESOLUTION_RANK[provider_resolution] > VIDEO_UPSCALE_RESOLUTION_RANK["1080p"]:
+                raise HTTPException(status_code=400, detail="火山画质增强大模型输入视频最高支持 1080p")
+        if processor_key in {
+            VideoUpscaleProcessorKey.VOLC_STANDARD_V1.value,
+            VideoUpscaleProcessorKey.VOLC_PROFESSIONAL_V1.value,
+        } and VIDEO_UPSCALE_RESOLUTION_RANK[provider_resolution] > VIDEO_UPSCALE_RESOLUTION_RANK["2K"]:
+            raise HTTPException(status_code=400, detail="火山标准版/专业版输入视频最高支持 2K")
+
+        if rule.get("enabled"):
+            if target in seen:
+                raise HTTPException(status_code=400, detail=f"客户目标分辨率存在重复启用规则: {target}")
+            seen.add(target)
+
+    return normalized
+
+
+async def get_video_upscale_config(db: AsyncSession) -> dict[str, Any]:
+    record = await _get_record(db)
+    data = default_video_upscale_config() if record is None else validate_video_upscale_config(_load(record.value))
+    return {
+        "id": record.id if record else None,
+        "key": VIDEO_UPSCALE_CONFIG_KEY,
+        "description": record.description if record else VIDEO_UPSCALE_CONFIG_DESCRIPTION,
+        "data": data,
+        "created_at": record.created_at if record else None,
+        "updated_at": record.updated_at if record else None,
+    }
+
+
+async def get_runtime_video_upscale_config(db: AsyncSession) -> dict[str, Any]:
+    record = await _get_record(db)
+    if record is None:
+        return default_video_upscale_config()
+    return validate_video_upscale_config(_load(record.value))
+
+
+async def save_video_upscale_config(db: AsyncSession, data: dict[str, Any] | VideoUpscaleConfigData) -> dict[str, Any]:
+    normalized = validate_video_upscale_config(data)
+    record = await _get_record(db)
+    old_version = 0
+    if record:
+        try:
+            old_version = int((_load(record.value).get("version") or 0))
+        except Exception:
+            old_version = 0
+    normalized["version"] = max(old_version + 1, VIDEO_UPSCALE_CONFIG_VERSION)
+
+    if record is None:
+        record = SystemConfig(
+            id=generate_id(),
+            key=VIDEO_UPSCALE_CONFIG_KEY,
+            value=_dump(normalized),
+            description=VIDEO_UPSCALE_CONFIG_DESCRIPTION,
+        )
+        db.add(record)
+    else:
+        record.value = _dump(normalized)
+        record.description = VIDEO_UPSCALE_CONFIG_DESCRIPTION
+    await db.flush()
+    return await get_video_upscale_config(db)
diff --git a/video-gen-api/app/services/video_upscale/guard_service.py b/video-gen-api/app/services/video_upscale/guard_service.py
new file mode 100644
index 00000000..cf916709
--- /dev/null
+++ b/video-gen-api/app/services/video_upscale/guard_service.py
@@ -0,0 +1,61 @@
+from __future__ import annotations
+
+import os
+from collections.abc import Iterable
+
+from fastapi import HTTPException
+from sqlalchemy import or_, select
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from app.enums.video_upscale import VideoUpscaleTaskStatus
+from app.models.video_upscale_task import VideoUpscaleTask
+
+
+async def assert_no_recoverable_failed_upscale_tasks(
+    db: AsyncSession,
+    chat_task_ids: Iterable[str] | None = None,
+    *,
+    generation_record_ids: Iterable[str] | None = None,
+) -> None:
+    """阻止删除仍保留本地源视频、可由管理员人工恢复的超分失败任务。"""
+    chat_ids = list(dict.fromkeys(str(item) for item in (chat_task_ids or []) if item))
+    record_ids = list(dict.fromkeys(str(item) for item in (generation_record_ids or []) if item))
+    if not chat_ids and not record_ids:
+        return
+
+    owner_conditions = []
+    if chat_ids:
+        owner_conditions.append(VideoUpscaleTask.chat_generation_task_id.in_(chat_ids))
+    if record_ids:
+        owner_conditions.append(VideoUpscaleTask.generation_record_id.in_(record_ids))
+
+    result = await db.execute(
+        select(
+            VideoUpscaleTask.chat_generation_task_id,
+            VideoUpscaleTask.generation_record_id,
+            VideoUpscaleTask.source_local_path,
+        ).where(
+            or_(*owner_conditions),
+            VideoUpscaleTask.status == VideoUpscaleTaskStatus.FAILED.value,
+            VideoUpscaleTask.source_local_path.isnot(None),
+            VideoUpscaleTask.source_deleted_at.is_(None),
+        )
+    )
+    recoverable = []
+    for chat_task_id, generation_record_id, source_local_path in result.all():
+        if source_local_path and os.path.isfile(str(source_local_path)):
+            recoverable.append(
+                {
+                    "owner_type": "chat_generation_task" if chat_task_id else "generation_record",
+                    "owner_id": str(chat_task_id or generation_record_id),
+                }
+            )
+    if recoverable:
+        raise HTTPException(
+            status_code=409,
+            detail={
+                "message": "当前生成任务异常暂不能删除",
+                "items": recoverable,
+                "task_count": len(recoverable),
+            },
+        )
diff --git a/video-gen-api/app/services/video_upscale/local_ffmpeg_service.py b/video-gen-api/app/services/video_upscale/local_ffmpeg_service.py
new file mode 100644
index 00000000..4a2457b8
--- /dev/null
+++ b/video-gen-api/app/services/video_upscale/local_ffmpeg_service.py
@@ -0,0 +1,128 @@
+from __future__ import annotations
+
+import asyncio
+import os
+import subprocess
+from pathlib import Path
+
+from app.config import settings
+from app.services.video_cover_service import get_ffmpeg_bin
+from app.services.video_upscale.media_service import build_part_mp4_path, is_valid_file, probe_video, safe_remove
+
+
+class LocalVideoUpscaleError(RuntimeError):
+    pass
+
+
+def _build_filter(target_width: int, target_height: int) -> str:
+    if target_width <= 0 or target_height <= 0 or target_width % 2 or target_height % 2:
+        raise LocalVideoUpscaleError("目标宽高必须是正偶数")
+    return (
+        "hqdn3d=0.8:0.6:2.5:1.8,"
+        f"scale={target_width}:{target_height}:"
+        "force_original_aspect_ratio=increase:force_divisible_by=2:flags=lanczos,"
+        f"crop={target_width}:{target_height}:(iw-ow)/2:(ih-oh)/2,"
+        "unsharp=5:5:0.40:5:5:0.0,"
+        "eq=contrast=1.02:saturation=1.03,"
+        "setsar=1"
+    )
+
+
+def _run_ffmpeg_sync(
+    *,
+    source_path: str,
+    part_path: str,
+    target_width: int,
+    target_height: int,
+    timeout_seconds: int,
+) -> None:
+    ffmpeg_bin = get_ffmpeg_bin()  # 明确复用 config.py 的 FFMPEG_BIN。
+    cmd = [
+        ffmpeg_bin,
+        "-hide_banner",
+        "-nostdin",
+        "-y",
+        "-i",
+        source_path,
+        "-map",
+        "0:v:0",
+        "-map",
+        "0:a?",
+        "-vf",
+        _build_filter(target_width, target_height),
+        "-c:v",
+        "libx264",
+        "-preset",
+        "slow",
+        "-crf",
+        "18",
+        "-profile:v",
+        "high",
+        "-pix_fmt",
+        "yuv420p",
+        "-movflags",
+        "+faststart",
+        "-c:a",
+        "aac",
+        "-b:a",
+        "192k",
+        part_path,
+    ]
+    try:
+        result = subprocess.run(
+            cmd,
+            stdout=subprocess.PIPE,
+            stderr=subprocess.PIPE,
+            text=True,
+            encoding="utf-8",
+            errors="replace",
+            timeout=max(30, int(timeout_seconds)),
+            shell=False,
+        )
+    except subprocess.TimeoutExpired as exc:
+        raise LocalVideoUpscaleError(f"本地 FFmpeg 超分超时: {timeout_seconds} 秒") from exc
+    except OSError as exc:
+        raise LocalVideoUpscaleError(f"本地 FFmpeg 无法启动: {exc}") from exc
+    if result.returncode != 0:
+        raise LocalVideoUpscaleError(f"本地 FFmpeg 超分失败: {(result.stderr or '').strip()[-4000:]}")
+
+
+async def execute_local_ffmpeg_crop(
+    *,
+    source_path: str,
+    final_path: str,
+    target_width: int,
+    target_height: int,
+    timeout_seconds: int | None = None,
+) -> str:
+    if not is_valid_file(source_path):
+        raise LocalVideoUpscaleError(f"超分源视频不存在或为空: {source_path}")
+    if is_valid_file(final_path):
+        info = await probe_video(final_path)
+        if info.width == target_width and info.height == target_height:
+            return final_path
+
+    os.makedirs(os.path.dirname(final_path), exist_ok=True)
+    part_path = build_part_mp4_path(final_path)
+    safe_remove(part_path)
+    try:
+        await asyncio.to_thread(
+            _run_ffmpeg_sync,
+            source_path=source_path,
+            part_path=part_path,
+            target_width=target_width,
+            target_height=target_height,
+            timeout_seconds=int(timeout_seconds or settings.VIDEO_UPSCALE_LOCAL_TIMEOUT_SECONDS),
+        )
+        if not is_valid_file(part_path):
+            raise LocalVideoUpscaleError("本地 FFmpeg 输出文件为空")
+        info = await probe_video(part_path)
+        if info.width != target_width or info.height != target_height:
+            raise LocalVideoUpscaleError(
+                f"本地 FFmpeg 输出尺寸不正确: {info.width}x{info.height}，预期 {target_width}x{target_height}"
+            )
+        os.replace(part_path, final_path)
+        return final_path
+    except Exception:
+        safe_remove(part_path)
+        raise
diff --git a/video-gen-api/app/services/video_upscale/log_service.py b/video-gen-api/app/services/video_upscale/log_service.py
new file mode 100644
index 00000000..385f186f
--- /dev/null
+++ b/video-gen-api/app/services/video_upscale/log_service.py
@@ -0,0 +1,108 @@
+from __future__ import annotations
+
+from typing import Any
+from urllib.parse import urlsplit, urlunsplit
+
+from app.models.chat_generation_task import ChatGenerationTask
+from app.models.generation_record import GenerationRecord
+from app.services.operation_log_service import log_operation_event
+
+
+def _sanitize_url(value: Any) -> Any:
+    if not isinstance(value, str) or not value.startswith(("http://", "https://")):
+        return value
+    parts = urlsplit(value)
+    return urlunsplit((parts.scheme, parts.netloc, parts.path, "", ""))
+
+
+def _sanitize_detail(value: Any) -> Any:
+    if isinstance(value, dict):
+        result: dict[str, Any] = {}
+        for key, item in value.items():
+            key_text = str(key).lower()
+            if key_text in {"authorization", "api_key", "volc_api_key"}:
+                result[key] = "***"
+            elif "url" in key_text:
+                result[key] = _sanitize_url(item)
+            else:
+                result[key] = _sanitize_detail(item)
+        return result
+    if isinstance(value, list):
+        return [_sanitize_detail(item) for item in value]
+    return value
+
+
+def _owner_context(task: Any | None, upscale_task: Any | None) -> dict[str, Any]:
+    if isinstance(task, ChatGenerationTask):
+        return {
+            "owner_type": "chat_generation_task",
+            "owner_id": task.id,
+            "chat_generation_task_id": task.id,
+            "generation_record_id": None,
+            "project_id": None,
+            "generation_mode": task.generation_mode,
+        }
+    if isinstance(task, GenerationRecord):
+        return {
+            "owner_type": "generation_record",
+            "owner_id": task.id,
+            "chat_generation_task_id": None,
+            "generation_record_id": task.id,
+            "project_id": task.project_id,
+            "generation_mode": None,
+        }
+    chat_task_id = getattr(upscale_task, "chat_generation_task_id", None) if upscale_task else None
+    generation_record_id = getattr(upscale_task, "generation_record_id", None) if upscale_task else None
+    return {
+        "owner_type": "chat_generation_task" if chat_task_id else "generation_record" if generation_record_id else None,
+        "owner_id": chat_task_id or generation_record_id,
+        "chat_generation_task_id": chat_task_id,
+        "generation_record_id": generation_record_id,
+        "project_id": None,
+        "generation_mode": None,
+    }
+
+
+def log_video_upscale_event(
+    *,
+    event_type: str,
+    event_status: str = "success",
+    task: Any | None = None,
+    upscale_task: Any | None = None,
+    remote_request_id: str | None = None,
+    message: str | None = None,
+    detail: dict[str, Any] | None = None,
+    error: str | None = None,
+) -> None:
+    """统一复用 operation_log_service 写入视频超分步骤日志。"""
+    final_detail = _owner_context(task, upscale_task)
+    final_detail.update(_sanitize_detail(dict(detail or {})))
+    if upscale_task is not None:
+        final_detail.update(
+            {
+                "upscale_task_id": getattr(upscale_task, "id", None),
+                "processor_key": getattr(upscale_task, "processor_key", None),
+                "upscale_status": getattr(upscale_task, "status", None),
+                "upscale_stage": getattr(upscale_task, "stage", None),
+                "attempt_count": getattr(upscale_task, "attempt_count", None),
+                "failure_count": getattr(upscale_task, "failure_count", None),
+                "provider_task_id": getattr(upscale_task, "provider_task_id", None),
+                "input_source_type": getattr(upscale_task, "input_source_type", None),
+                "target_width": getattr(upscale_task, "target_width", None),
+                "target_height": getattr(upscale_task, "target_height", None),
+            }
+        )
+    owner_id = final_detail.get("owner_id")
+    log_operation_event(
+        domain="video_upscale",
+        event_type=event_type,
+        event_status=event_status,
+        source="service",
+        user_id=getattr(task, "user_id", None) if task is not None else None,
+        group_id=getattr(task, "parent_task_id", None) if task is not None else None,
+        task_id=owner_id,
+        remote_request_id=remote_request_id,
+        message=message,
+        detail=final_detail,
+        error=error,
+    )
diff --git a/video-gen-api/app/services/video_upscale/media_service.py b/video-gen-api/app/services/video_upscale/media_service.py
new file mode 100644
index 00000000..082d376e
--- /dev/null
+++ b/video-gen-api/app/services/video_upscale/media_service.py
@@ -0,0 +1,207 @@
+from __future__ import annotations
+
+import asyncio
+import json
+import os
+import shutil
+import subprocess
+import uuid
+from dataclasses import dataclass
+from datetime import datetime, timedelta, timezone
+from pathlib import Path
+from typing import Any
+from urllib.parse import parse_qsl, urlsplit
+
+import httpx
+
+from app.config import settings
+from app.services.resource_signed_url_service import build_resource_signed_url
+from app.services.video_cover_service import get_ffmpeg_bin
+
+
+@dataclass(slots=True)
+class VideoMediaInfo:
+    width: int
+    height: int
+    duration_seconds: float
+    fps: float
+    codec_name: str | None = None
+    color_transfer: str | None = None
+    color_primaries: str | None = None
+    color_space: str | None = None
+
+
+def build_part_mp4_path(final_path: str) -> str:
+    path = Path(final_path)
+    return str(path.with_name(f"{path.stem}.{uuid.uuid4().hex}.part.mp4"))
+
+
+def safe_remove(path: str | None) -> bool:
+    if not path:
+        return True
+    try:
+        if os.path.exists(path):
+            os.remove(path)
+        return not os.path.exists(path)
+    except OSError:
+        return False
+
+
+def is_valid_file(path: str | None) -> bool:
+    if not path:
+        return False
+    try:
+        return os.path.isfile(path) and os.path.getsize(path) > 0
+    except OSError:
+        return False
+
+
+def get_ffprobe_bin() -> str:
+    ffmpeg = Path(get_ffmpeg_bin())
+    sibling = ffmpeg.with_name("ffprobe.exe" if ffmpeg.suffix.lower() == ".exe" else "ffprobe")
+    if sibling.exists():
+        return str(sibling)
+    found = shutil.which("ffprobe") or shutil.which("ffprobe.exe")
+    if found:
+        return found
+    raise RuntimeError("未找到 ffprobe，请确保其与 FFMPEG_BIN 同目录或已加入 PATH")
+
+
+def _parse_fps(value: str | None) -> float:
+    if not value:
+        return 0.0
+    try:
+        if "/" in value:
+            left, right = value.split("/", 1)
+            denominator = float(right)
+            return float(left) / denominator if denominator else 0.0
+        return float(value)
+    except Exception:
+        return 0.0
+
+
+def probe_video_sync(path: str, timeout_seconds: int = 30) -> VideoMediaInfo:
+    if not is_valid_file(path):
+        raise RuntimeError(f"视频文件不存在或为空: {path}")
+    cmd = [
+        get_ffprobe_bin(), "-v", "error", "-select_streams", "v:0",
+        "-show_entries", "stream=width,height,codec_name,avg_frame_rate,color_transfer,color_primaries,color_space:format=duration",
+        "-of", "json", path,
+    ]
+    result = subprocess.run(
+        cmd,
+        stdout=subprocess.PIPE,
+        stderr=subprocess.PIPE,
+        text=True,
+        encoding="utf-8",
+        errors="replace",
+        timeout=max(5, int(timeout_seconds)),
+        shell=False,
+    )
+    if result.returncode != 0:
+        raise RuntimeError(f"ffprobe 校验失败: {(result.stderr or '').strip()[-2000:]}")
+    try:
+        payload = json.loads(result.stdout or "{}")
+        stream = (payload.get("streams") or [])[0]
+        width = int(stream.get("width") or 0)
+        height = int(stream.get("height") or 0)
+        duration = float((payload.get("format") or {}).get("duration") or 0)
+    except Exception as exc:
+        raise RuntimeError(f"ffprobe 响应解析失败: {exc}") from exc
+    if width <= 0 or height <= 0:
+        raise RuntimeError("ffprobe 未读取到有效视频宽高")
+    return VideoMediaInfo(
+        width=width,
+        height=height,
+        duration_seconds=duration,
+        fps=_parse_fps(stream.get("avg_frame_rate")),
+        codec_name=stream.get("codec_name"),
+        color_transfer=stream.get("color_transfer"),
+        color_primaries=stream.get("color_primaries"),
+        color_space=stream.get("color_space"),
+    )
+
+
+async def probe_video(path: str, timeout_seconds: int = 30) -> VideoMediaInfo:
+    return await asyncio.to_thread(probe_video_sync, path, timeout_seconds)
+
+
+def parse_tos_signed_url_expiry(url: str | None) -> tuple[datetime | None, datetime | None]:
+    if not url:
+        return None, None
+    params = {key.lower(): value for key, value in parse_qsl(urlsplit(url).query, keep_blank_values=True)}
+    date_text = params.get("x-tos-date")
+    expires_text = params.get("x-tos-expires")
+    if not date_text or not expires_text:
+        return None, None
+    try:
+        signed_at = datetime.strptime(date_text, "%Y%m%dT%H%M%SZ").replace(tzinfo=timezone.utc)
+        expires_seconds = int(expires_text)
+        if expires_seconds <= 0:
+            return None, None
+        return signed_at, signed_at + timedelta(seconds=expires_seconds)
+    except Exception:
+        return None, None
+
+
+async def probe_remote_url(url: str) -> bool:
+    timeout = httpx.Timeout(
+        connect=max(1, int(settings.VIDEO_UPSCALE_REMOTE_URL_PROBE_CONNECT_TIMEOUT_SECONDS or 3)),
+        read=max(1, int(settings.VIDEO_UPSCALE_REMOTE_URL_PROBE_READ_TIMEOUT_SECONDS or 5)),
+        write=5,
+        pool=5,
+    )
+    try:
+        async with httpx.AsyncClient(timeout=timeout, follow_redirects=True) as client:
+            async with client.stream("GET", url, headers={"Range": "bytes=0-0"}) as response:
+                if response.status_code not in {200, 206}:
+                    return False
+                async for chunk in response.aiter_bytes():
+                    return bool(chunk)
+        return False
+    except Exception:
+        return False
+
+
+def build_source_resource_url(source_local_path: str) -> str:
+    root = Path(settings.STORAGE_LOCAL_PATH).resolve()
+    path = Path(source_local_path).resolve()
+    try:
+        relative = path.relative_to(root).as_posix()
+    except ValueError as exc:
+        raise RuntimeError("超分源视频不在 STORAGE_LOCAL_PATH 下，无法生成签名 URL") from exc
+    return f"{settings.BASE_URL.rstrip('/')}/generate/videos/{relative}"
+
+
+def build_local_source_signed_url(source_local_path: str, expire_seconds: int) -> str:
+    return build_resource_signed_url(
+        build_source_resource_url(source_local_path),
+        expire_seconds=max(600, int(expire_seconds)),
+    )
+
+
+async def download_video_to_path(url: str, final_path: str, timeout_seconds: int) -> str:
+    if is_valid_file(final_path):
+        try:
+            await probe_video(final_path)
+            return final_path
+        except Exception:
+            safe_remove(final_path)
+    os.makedirs(os.path.dirname(final_path), exist_ok=True)
+    part_path = build_part_mp4_path(final_path)
+    timeout = httpx.Timeout(max(30, int(timeout_seconds)))
+    try:
+        async with httpx.AsyncClient(timeout=timeout, follow_redirects=True) as client:
+            async with client.stream("GET", url) as response:
+                response.raise_for_status()
+                with open(part_path, "wb") as file_obj:
+                    async for chunk in response.aiter_bytes(chunk_size=1024 * 1024):
+                        file_obj.write(chunk)
+        if not is_valid_file(part_path):
+            raise RuntimeError("视频下载完成但临时文件为空")
+        await probe_video(part_path)
+        os.replace(part_path, final_path)
+        return final_path
+    except Exception:
+        safe_remove(part_path)
+        raise
diff --git a/video-gen-api/app/services/video_upscale/owner_service.py b/video-gen-api/app/services/video_upscale/owner_service.py
new file mode 100644
index 00000000..bc80844d
--- /dev/null
+++ b/video-gen-api/app/services/video_upscale/owner_service.py
@@ -0,0 +1,120 @@
+from __future__ import annotations
+
+from typing import Any, TypeAlias
+
+from sqlalchemy import select
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from app.enums.generation_status import GenerationRecordPipelineStage, GenerationStatus
+from app.enums.generation_task import ChatGenerationPipelineStage, ChatGenerationTaskStatus
+from app.models.chat_generation_task import ChatGenerationTask
+from app.models.generation_record import GenerationRecord
+from app.models.video_upscale_task import VideoUpscaleTask
+from app.services.generation.ai.task_group_service import aggregate_parent_for_child
+from app.services.generation.module_hook_service import notify_chat_generation_task_finished
+
+VideoUpscaleOwner: TypeAlias = ChatGenerationTask | GenerationRecord
+
+
+def owner_type(owner: VideoUpscaleOwner | None) -> str | None:
+    if isinstance(owner, ChatGenerationTask):
+        return "chat_generation_task"
+    if isinstance(owner, GenerationRecord):
+        return "generation_record"
+    return None
+
+
+def owner_id(owner: VideoUpscaleOwner | None) -> str | None:
+    return str(getattr(owner, "id", "") or "") or None
+
+
+def owner_is_generating(owner: VideoUpscaleOwner) -> bool:
+    if isinstance(owner, ChatGenerationTask):
+        return owner.status == ChatGenerationTaskStatus.GENERATING.value
+    return owner.status == GenerationStatus.generating.value
+
+
+def owner_is_completed(owner: VideoUpscaleOwner) -> bool:
+    if isinstance(owner, ChatGenerationTask):
+        return owner.status == ChatGenerationTaskStatus.COMPLETED.value
+    return owner.status == GenerationStatus.completed.value
+
+
+def set_owner_stage(owner: VideoUpscaleOwner, stage: str) -> None:
+    owner.pipeline_stage = stage
+
+
+def upscale_stage_value(owner: VideoUpscaleOwner, chat_stage: ChatGenerationPipelineStage | str) -> str:
+    value = chat_stage.value if hasattr(chat_stage, "value") else str(chat_stage)
+    if isinstance(owner, ChatGenerationTask):
+        return value
+    try:
+        return GenerationRecordPipelineStage(value).value
+    except ValueError:
+        return value
+
+
+async def load_upscale_owner(
+    db: AsyncSession,
+    upscale: VideoUpscaleTask,
+    *,
+    for_update: bool,
+) -> VideoUpscaleOwner | None:
+    if upscale.chat_generation_task_id:
+        query = select(ChatGenerationTask).where(
+            ChatGenerationTask.id == upscale.chat_generation_task_id,
+            ChatGenerationTask.deleted_at.is_(None),
+        )
+    elif upscale.generation_record_id:
+        query = select(GenerationRecord).where(
+            GenerationRecord.id == upscale.generation_record_id,
+            GenerationRecord.deleted_at.is_(None),
+        )
+    else:
+        return None
+    if for_update:
+        query = query.with_for_update()
+    result = await db.execute(query.limit(1))
+    return result.scalar_one_or_none()
+
+
+async def mark_owner_upscale_failed(
+    db: AsyncSession,
+    owner: VideoUpscaleOwner,
+    *,
+    error_message: str,
+) -> None:
+    if isinstance(owner, ChatGenerationTask):
+        owner.status = ChatGenerationTaskStatus.FAILED.value
+        owner.pipeline_stage = ChatGenerationPipelineStage.UPSCALE_FAILED.value
+        owner.error_message = error_message
+        await notify_chat_generation_task_finished(db, owner)
+        await aggregate_parent_for_child(db, owner)
+        return
+
+    owner.status = GenerationStatus.failed.value
+    owner.pipeline_stage = GenerationRecordPipelineStage.UPSCALE_FAILED.value
+    owner.error_message = error_message
+
+
+def restore_owner_for_upscale_retry(owner: VideoUpscaleOwner) -> None:
+    if isinstance(owner, ChatGenerationTask):
+        owner.status = ChatGenerationTaskStatus.GENERATING.value
+        owner.pipeline_stage = ChatGenerationPipelineStage.UPSCALE_QUEUED.value
+    else:
+        owner.status = GenerationStatus.generating.value
+        owner.pipeline_stage = GenerationRecordPipelineStage.UPSCALE_QUEUED.value
+    owner.error_message = None
+
+
+def owner_context(owner: VideoUpscaleOwner | None) -> dict[str, Any]:
+    if owner is None:
+        return {}
+    return {
+        "owner_type": owner_type(owner),
+        "owner_id": owner_id(owner),
+        "chat_generation_task_id": owner.id if isinstance(owner, ChatGenerationTask) else None,
+        "generation_record_id": owner.id if isinstance(owner, GenerationRecord) else None,
+        "project_id": getattr(owner, "project_id", None),
+        "generation_mode": getattr(owner, "generation_mode", None),
+    }
diff --git a/video-gen-api/app/services/video_upscale/snapshot_service.py b/video-gen-api/app/services/video_upscale/snapshot_service.py
new file mode 100644
index 00000000..1f6d0f29
--- /dev/null
+++ b/video-gen-api/app/services/video_upscale/snapshot_service.py
@@ -0,0 +1,176 @@
+from __future__ import annotations
+
+import hashlib
+import json
+from datetime import datetime, timezone
+from typing import Any, Iterable
+
+from fastapi import HTTPException
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from app.config import settings
+from app.enums.video_upscale import (
+    ALL_PROCESSOR_KEYS,
+    VIDEO_UPSCALE_RESOLUTIONS,
+    VideoUpscaleProcessorKey,
+    normalize_video_upscale_resolution,
+    video_upscale_short_edge_pixels,
+)
+from app.services.video_upscale.config_service import get_runtime_video_upscale_config
+from app.services.video_upscale.log_service import log_video_upscale_event
+
+
+def normalize_resolution(value: str | None) -> str:
+    return normalize_video_upscale_resolution(value)
+
+
+def _even(value: float) -> int:
+    rounded = int(round(value))
+    if rounded < 2:
+        rounded = 2
+    return rounded if rounded % 2 == 0 else rounded + 1
+
+
+def parse_aspect_ratio(value: str | None) -> tuple[int, int]:
+    text = str(value or "").strip()
+    try:
+        left, right = text.split(":", 1)
+        width = int(left)
+        height = int(right)
+    except Exception as exc:
+        raise HTTPException(status_code=400, detail=f"视频比例格式不合法: {text}") from exc
+    if width <= 0 or height <= 0:
+        raise HTTPException(status_code=400, detail=f"视频比例格式不合法: {text}")
+    return width, height
+
+
+def calculate_target_dimensions(*, aspect_ratio: str, target_resolution: str) -> tuple[int, int]:
+    ratio_w, ratio_h = parse_aspect_ratio(aspect_ratio)
+    try:
+        pixels = video_upscale_short_edge_pixels(target_resolution)
+    except ValueError as exc:
+        raise HTTPException(status_code=400, detail=str(exc)) from exc
+
+    if ratio_w >= ratio_h:
+        height = _even(pixels)
+        width = _even(height * ratio_w / ratio_h)
+    else:
+        width = _even(pixels)
+        height = _even(width * ratio_h / ratio_w)
+    return width, height
+
+
+def _runtime_processor_snapshot(processor_key: str) -> dict[str, Any]:
+    if processor_key not in ALL_PROCESSOR_KEYS:
+        raise HTTPException(status_code=500, detail=f"未注册的超分处理器: {processor_key}")
+    is_local = processor_key == VideoUpscaleProcessorKey.LOCAL_FFMPEG_CROP_V1.value
+    return {
+        "max_attempts": max(1, int(settings.VIDEO_UPSCALE_MAX_ATTEMPTS or 3)),
+        "timeout_seconds": int(
+            settings.VIDEO_UPSCALE_LOCAL_TIMEOUT_SECONDS
+            if is_local
+            else settings.VIDEO_UPSCALE_REMOTE_POLL_TIMEOUT_SECONDS
+        ),
+        "request_timeout_seconds": max(3, int(settings.VIDEO_UPSCALE_REMOTE_REQUEST_TIMEOUT_SECONDS or 30)),
+        "poll_timeout_seconds": max(60, int(settings.VIDEO_UPSCALE_REMOTE_POLL_TIMEOUT_SECONDS or 7200)),
+        "poll_interval_seconds": max(5, int(settings.VIDEO_UPSCALE_REMOTE_POLL_INTERVAL_SECONDS or 30)),
+        "source_url_expire_seconds": max(600, int(settings.VIDEO_UPSCALE_LOCAL_SIGNED_URL_EXPIRE_SECONDS or 7200)),
+        "bitrate_level": "medium",
+        "scene": "aigc",
+        "fps": None,
+        "queue_id": None,
+    }
+
+
+async def build_video_upscale_snapshot(
+    db: AsyncSession,
+    *,
+    target_resolution: str,
+    aspect_ratio: str,
+    supported_provider_resolutions: Iterable[str] | None = None,
+) -> tuple[str, bool, str | None]:
+    config = await get_runtime_video_upscale_config(db)
+    original_resolution = normalize_resolution(target_resolution)
+    if original_resolution not in VIDEO_UPSCALE_RESOLUTIONS:
+        return str(target_resolution).strip(), False, None
+    if not config.get("enabled"):
+        log_video_upscale_event(
+            event_type="upscale_snapshot_bypassed",
+            event_status="bypassed",
+            detail={"reason": "global_disabled", "target_resolution": original_resolution, "aspect_ratio": aspect_ratio},
+        )
+        return original_resolution, False, None
+
+    matched: dict[str, Any] | None = None
+    for rule in config.get("rules") or []:
+        if not rule.get("enabled"):
+            continue
+        if normalize_resolution(rule.get("target_resolution")) == original_resolution:
+            matched = dict(rule)
+            break
+    if matched is None:
+        log_video_upscale_event(
+            event_type="upscale_snapshot_bypassed",
+            event_status="bypassed",
+            detail={"reason": "rule_not_matched", "target_resolution": original_resolution, "aspect_ratio": aspect_ratio},
+        )
+        return original_resolution, False, None
+
+    provider_resolution = normalize_resolution(matched.get("provider_generation_resolution"))
+    processor_key = str(matched.get("processor_key") or "").strip()
+    processor = _runtime_processor_snapshot(processor_key)
+
+    supported = {normalize_resolution(item) for item in (supported_provider_resolutions or []) if item}
+    if supported and provider_resolution not in supported:
+        raise HTTPException(
+            status_code=400,
+            detail=f"超分规则要求实际生成 {provider_resolution}，但当前视频引擎不支持该分辨率",
+        )
+
+    target_width, target_height = calculate_target_dimensions(
+        aspect_ratio=aspect_ratio,
+        target_resolution=original_resolution,
+    )
+    target_short_edge_pixels = video_upscale_short_edge_pixels(original_resolution)
+    snapshot: dict[str, Any] = {
+        "config_version": int(config.get("version") or 1),
+        "target_resolution": original_resolution,
+        "provider_generation_resolution": provider_resolution,
+        "processor_key": processor_key,
+        "processor": processor,
+        "aspect_ratio": aspect_ratio,
+        "target_short_edge_pixels": target_short_edge_pixels,
+        "target_width": target_width,
+        "target_height": target_height,
+        "delete_source_after_success": bool(config.get("delete_source_after_success", True)),
+        "snapshot_created_at": datetime.now(timezone.utc).isoformat(),
+    }
+    canonical = json.dumps(snapshot, ensure_ascii=False, sort_keys=True, separators=(",", ":"))
+    snapshot["snapshot_hash"] = hashlib.sha256(canonical.encode("utf-8")).hexdigest()
+    log_video_upscale_event(
+        event_type="upscale_snapshot_matched",
+        detail={
+            "target_resolution": original_resolution,
+            "provider_generation_resolution": provider_resolution,
+            "processor_key": processor_key,
+            "aspect_ratio": aspect_ratio,
+            "target_width": target_width,
+            "target_height": target_height,
+            "delete_source_after_success": snapshot["delete_source_after_success"],
+            "config_version": snapshot["config_version"],
+            "snapshot_hash": snapshot["snapshot_hash"],
+        },
+    )
+    return provider_resolution, True, json.dumps(snapshot, ensure_ascii=False, separators=(",", ":"))
+
+
+def parse_video_upscale_snapshot(value: str | None) -> dict[str, Any]:
+    if not value:
+        return {}
+    try:
+        data = json.loads(value)
+    except Exception as exc:
+        raise RuntimeError(f"超分快照不是合法 JSON: {exc}") from exc
+    if not isinstance(data, dict):
+        raise RuntimeError("超分快照必须是 JSON 对象")
+    return data
diff --git a/video-gen-api/app/services/video_upscale/task_service.py b/video-gen-api/app/services/video_upscale/task_service.py
new file mode 100644
index 00000000..059925cf
--- /dev/null
+++ b/video-gen-api/app/services/video_upscale/task_service.py
@@ -0,0 +1,1431 @@
+from __future__ import annotations
+
+import json
+import math
+import os
+import uuid
+from datetime import datetime, timedelta, timezone
+from typing import Any
+from urllib.parse import urlsplit, urlunsplit
+
+from sqlalchemy import and_, or_, select
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from app.config import settings
+from app.enums.celery_queue import CeleryQueue
+from app.enums.generation_task import (
+    ChatGenerationPipelineStage,
+    ChatGenerationTaskStatus,
+    GenerationType,
+)
+from app.enums.video_upscale import (
+    LOCAL_PROCESSOR_KEYS,
+    REMOTE_PROCESSOR_KEYS,
+    VIDEO_UPSCALE_SOURCE_RETAINED_MARKER,
+    VideoUpscaleInputSourceType,
+    VideoUpscaleProbeStatus,
+    VideoUpscaleStage,
+    VideoUpscaleTaskStatus,
+)
+from app.models.chat_generation_task import ChatGenerationTask
+from app.models.generation_record import GenerationRecord
+from app.models.video_upscale_task import VideoUpscaleTask
+from app.services.generation.ai.task_group_service import aggregate_parent_for_child
+from app.services.generation.module_hook_service import notify_chat_generation_task_finished
+from app.services.media_token_usage_snapshot_service import (
+    sync_chat_generation_task_media_token_snapshot,
+    sync_generation_record_media_token_snapshot,
+)
+from app.services.video_upscale.log_service import log_video_upscale_event
+from app.services.resource_accounting_service import (
+    record_chat_task_generated_resource,
+    record_generation_record_generated_resource,
+    safe_file_size,
+)
+from app.services.video_cover_service import async_create_video_cover_for_local_video
+from app.services.video_upscale.local_ffmpeg_service import execute_local_ffmpeg_crop
+from app.services.video_upscale.owner_service import (
+    VideoUpscaleOwner,
+    load_upscale_owner,
+    mark_owner_upscale_failed,
+    owner_is_completed,
+    owner_is_generating,
+    restore_owner_for_upscale_retry,
+    set_owner_stage,
+    upscale_stage_value,
+)
+from app.services.video_upscale.media_service import (
+    build_local_source_signed_url,
+    download_video_to_path,
+    is_valid_file,
+    parse_tos_signed_url_expiry,
+    probe_remote_url,
+    probe_video,
+    safe_remove,
+)
+from app.services.video_upscale.snapshot_service import parse_video_upscale_snapshot
+from app.services.video_upscale.volc_service import (
+    VolcMediaKitError,
+    is_remote_input_access_error,
+    query_task,
+    submit_video_enhance,
+)
+from app.utils.id_gen import generate_id
+
+
+def _now() -> datetime:
+    return datetime.now(timezone.utc)
+
+
+def _aware(value: datetime | None) -> datetime | None:
+    if value is None:
+        return None
+    if value.tzinfo is None:
+        return value.replace(tzinfo=timezone.utc)
+    return value.astimezone(timezone.utc)
+
+
+def _date_dir(owner: VideoUpscaleOwner) -> str:
+    fixed = str(getattr(owner, "download_storage_date_dir", None) or "").strip().strip("/")
+    if fixed:
+        return fixed
+    created = _aware(owner.created_at) or _now()
+    return created.strftime("%Y/%m/%d")
+
+
+def _final_video_path(owner: VideoUpscaleOwner) -> tuple[str, str]:
+    date_dir = _date_dir(owner)
+    path = os.path.join(settings.STORAGE_LOCAL_PATH, date_dir, f"{owner.id}.mp4")
+    url = f"/generate/videos/{date_dir}/{owner.id}.mp4"
+    return path, url
+
+
+def _snapshot(owner: VideoUpscaleOwner) -> dict[str, Any]:
+    data = parse_video_upscale_snapshot(owner.video_upscale_snapshot_json)
+    if not data:
+        raise RuntimeError("任务缺少视频超分快照")
+    return data
+
+
+
+def _sanitize_provider_payload(payload: dict[str, Any]) -> dict[str, Any]:
+    data = dict(payload or {})
+    value = data.get("video_url")
+    if isinstance(value, str) and value.startswith(("http://", "https://")):
+        parts = urlsplit(value)
+        data["video_url"] = urlunsplit((parts.scheme, parts.netloc, parts.path, "", ""))
+    return data
+
+
+def _processor(snapshot: dict[str, Any]) -> dict[str, Any]:
+    value = snapshot.get("processor")
+    if not isinstance(value, dict):
+        raise RuntimeError("超分快照缺少处理器参数")
+    return value
+
+
+def _max_failures(snapshot: dict[str, Any]) -> int:
+    return max(1, int(_processor(snapshot).get("max_attempts") or 3))
+
+
+def _retry_at(failure_count: int) -> datetime:
+    base = max(1, int(settings.VIDEO_UPSCALE_RETRY_BACKOFF_SECONDS or 60))
+    multiplier = min(max(1, failure_count), 10)
+    return _now() + timedelta(seconds=base * multiplier)
+
+
+def _countdown(value: datetime | None) -> int:
+    target = _aware(value)
+    if not target:
+        return 1
+    return max(1, math.ceil((target - _now()).total_seconds()))
+
+
+def _lease_until(seconds: int | None = None) -> datetime:
+    return _now() + timedelta(seconds=max(60, int(seconds or settings.VIDEO_UPSCALE_TASK_LEASE_SECONDS or 1800)))
+
+
+def _safe_apply_async(
+    celery_task: Any,
+    *,
+    args: list[Any],
+    queue: str,
+    task: VideoUpscaleOwner | None,
+    upscale_task: VideoUpscaleTask | None,
+    action: str,
+    countdown: int | None = None,
+    kwargs: dict[str, Any] | None = None,
+) -> bool:
+    options: dict[str, Any] = {"args": args, "queue": queue}
+    if countdown is not None:
+        options["countdown"] = max(0, int(countdown))
+    if kwargs:
+        options["kwargs"] = kwargs
+    try:
+        celery_task.apply_async(**options)
+        return True
+    except Exception as exc:
+        log_video_upscale_event(
+            event_type="upscale_queue_enqueue_failed",
+            event_status="failed",
+            task=task,
+            upscale_task=upscale_task,
+            message=str(exc),
+            detail={"action": action, "queue": queue, "countdown": countdown},
+            error=str(exc),
+        )
+        return False
+
+
+async def _load_pair(
+    db: AsyncSession,
+    upscale_task_id: str,
+    *,
+    for_update: bool = True,
+) -> tuple[VideoUpscaleTask | None, VideoUpscaleOwner | None]:
+    query = select(VideoUpscaleTask).where(VideoUpscaleTask.id == upscale_task_id)
+    if for_update:
+        query = query.with_for_update()
+    result = await db.execute(query.limit(1))
+    upscale = result.scalar_one_or_none()
+    if not upscale:
+        return None, None
+    owner = await load_upscale_owner(db, upscale, for_update=for_update)
+    return upscale, owner
+
+
+async def _persist_provider_error_payload(
+    db: AsyncSession,
+    *,
+    upscale_task_id: str,
+    payload: dict[str, Any] | None,
+) -> None:
+    if not payload:
+        return
+    upscale, _owner = await _load_pair(db, upscale_task_id, for_update=True)
+    if not upscale:
+        return
+    upscale.provider_response_json = json.dumps(payload, ensure_ascii=False, default=str)
+    await db.commit()
+
+
+async def prepare_video_upscale_task(
+    db: AsyncSession,
+    *,
+    task: ChatGenerationTask | None = None,
+    generation_record: GenerationRecord | None = None,
+    source_local_path: str,
+    source_file_size_bytes: int,
+    source_remote_url: str | None = None,
+) -> VideoUpscaleTask:
+    owner: VideoUpscaleOwner | None = task or generation_record
+    if owner is None:
+        raise RuntimeError("缺少视频超分所有者")
+    if owner.gen_type != GenerationType.VIDEO.value or not bool(owner.video_upscale_enabled_snapshot):
+        raise RuntimeError("当前任务未启用视频超分快照")
+    snapshot = _snapshot(owner)
+    source_info = await probe_video(source_local_path)
+    remote_url = str(source_remote_url or getattr(owner, "remote_result_url", None) or "").strip() or None
+    signed_at, expires_at = parse_tos_signed_url_expiry(remote_url)
+
+    owner_filter = (
+        VideoUpscaleTask.chat_generation_task_id == owner.id
+        if isinstance(owner, ChatGenerationTask)
+        else VideoUpscaleTask.generation_record_id == owner.id
+    )
+    result = await db.execute(
+        select(VideoUpscaleTask).where(owner_filter).with_for_update().limit(1)
+    )
+    upscale = result.scalar_one_or_none()
+    if upscale is None:
+        upscale = VideoUpscaleTask(
+            id=generate_id(),
+            chat_generation_task_id=owner.id if isinstance(owner, ChatGenerationTask) else None,
+            generation_record_id=owner.id if isinstance(owner, GenerationRecord) else None,
+            processor_key=str(snapshot.get("processor_key") or ""),
+            target_width=int(snapshot.get("target_width") or 0),
+            target_height=int(snapshot.get("target_height") or 0),
+        )
+        db.add(upscale)
+    upscale.status = VideoUpscaleTaskStatus.PENDING.value
+    upscale.stage = VideoUpscaleStage.SOURCE_READY.value
+    upscale.source_local_path = source_local_path
+    upscale.source_file_size_bytes = int(source_file_size_bytes or safe_file_size(source_local_path))
+    upscale.source_width = source_info.width
+    upscale.source_height = source_info.height
+    upscale.source_duration_seconds = float(source_info.duration_seconds)
+    upscale.source_deleted_at = None
+    upscale.source_delete_error = None
+    upscale.source_remote_url = remote_url
+    upscale.source_remote_url_signed_at = signed_at
+    upscale.source_remote_url_expires_at = expires_at
+    upscale.source_remote_url_probe_status = VideoUpscaleProbeStatus.NOT_CHECKED.value
+    upscale.last_error = None
+    upscale.next_retry_at = None
+    upscale.lease_token = None
+    upscale.lease_until = None
+    set_owner_stage(owner, upscale_stage_value(owner, ChatGenerationPipelineStage.UPSCALE_QUEUED))
+    await db.flush()
+    log_video_upscale_event(
+        event_type="upscale_source_download_success",
+        task=owner,
+        upscale_task=upscale,
+        detail={
+            "source_local_path": source_local_path,
+            "source_width": source_info.width,
+            "source_height": source_info.height,
+            "source_duration_seconds": source_info.duration_seconds,
+        },
+    )
+    return upscale
+
+
+async def enqueue_upscale_task(db: AsyncSession, *, upscale: VideoUpscaleTask, reason: str) -> str:
+    from app.tasks.video_upscale_tasks import execute_local, submit_remote
+
+    upscale_id = str(upscale.id)
+    processor_key = str(upscale.processor_key)
+    celery_id = f"upscale:{upscale_id}:{uuid.uuid4().hex[:16]}"
+    upscale.celery_task_id = celery_id
+    upscale.status = VideoUpscaleTaskStatus.PENDING.value
+    upscale.stage = VideoUpscaleStage.QUEUED.value
+    upscale.next_retry_at = None
+    await db.commit()
+
+    try:
+        if processor_key in LOCAL_PROCESSOR_KEYS:
+            execute_local.apply_async(
+                args=[upscale_id],
+                queue=settings.VIDEO_UPSCALE_LOCAL_QUEUE or CeleryQueue.GEN_VIDEO_UPSCALE_LOCAL.value,
+                task_id=celery_id,
+            )
+        elif processor_key in REMOTE_PROCESSOR_KEYS:
+            submit_remote.apply_async(
+                args=[upscale_id],
+                queue=settings.VIDEO_UPSCALE_REMOTE_QUEUE or CeleryQueue.GEN_VIDEO_UPSCALE_REMOTE.value,
+                task_id=celery_id,
+            )
+        else:
+            raise RuntimeError(f"未注册的超分处理器: {processor_key}")
+        log_video_upscale_event(
+            event_type="upscale_task_enqueued",
+            upscale_task=upscale,
+            detail={"reason": reason, "celery_task_id": celery_id, "processor_key": processor_key},
+        )
+    except Exception as exc:
+        # 数据库状态已经提交，不把队列瞬时异常误判为原视频下载失败或触发退款；
+        # gen_recovery 会扫描 pending/queued 任务并补投。
+        log_video_upscale_event(
+            event_type="upscale_task_enqueue_failed",
+            event_status="failed",
+            upscale_task=upscale,
+            message=str(exc),
+            detail={"reason": reason, "celery_task_id": celery_id, "processor_key": processor_key},
+            error=str(exc),
+        )
+    return celery_id
+
+
+async def _claim(
+    db: AsyncSession,
+    *,
+    upscale_task_id: str,
+    stage: str,
+    chat_stage: str,
+    increment_attempt: bool,
+    lease_seconds: int | None = None,
+) -> tuple[VideoUpscaleTask, VideoUpscaleOwner, dict[str, Any]] | None:
+    upscale, task = await _load_pair(db, upscale_task_id, for_update=True)
+    if not upscale or not task:
+        return None
+    if upscale.status in {VideoUpscaleTaskStatus.COMPLETED.value, VideoUpscaleTaskStatus.FAILED.value}:
+        return None
+    if not owner_is_generating(task):
+        return None
+    lease_until = _aware(upscale.lease_until)
+    if lease_until and lease_until > _now() and upscale.status == VideoUpscaleTaskStatus.PROCESSING.value:
+        return None
+
+    snapshot = _snapshot(task)
+    upscale.status = VideoUpscaleTaskStatus.PROCESSING.value
+    upscale.stage = stage
+    upscale.lease_token = uuid.uuid4().hex
+    upscale.lease_until = _lease_until(lease_seconds)
+    upscale.started_at = upscale.started_at or _now()
+    upscale.next_retry_at = None
+    if increment_attempt:
+        upscale.attempt_count = int(upscale.attempt_count or 0) + 1
+    set_owner_stage(task, upscale_stage_value(task, chat_stage))
+    await db.commit()
+    return upscale, task, snapshot
+
+
+async def _final_fail(
+    db: AsyncSession,
+    *,
+    upscale_task_id: str,
+    error_message: str,
+) -> None:
+    upscale, task = await _load_pair(db, upscale_task_id, for_update=True)
+    if not upscale or not task:
+        return
+    if upscale.status == VideoUpscaleTaskStatus.COMPLETED.value:
+        return
+    now = _now()
+    upscale.status = VideoUpscaleTaskStatus.FAILED.value
+    upscale.stage = VideoUpscaleStage.FAILED.value
+    upscale.failed_at = now
+    upscale.last_error = error_message
+    upscale.next_retry_at = None
+    upscale.lease_until = None
+    upscale.lease_token = None
+    await mark_owner_upscale_failed(db, task, error_message=error_message)
+    await db.commit()
+    log_video_upscale_event(
+        event_type="upscale_retry_exhausted",
+        event_status="failed",
+        task=task,
+        upscale_task=upscale,
+        message=error_message,
+        detail={
+            "refund_policy": "no_refund",
+            "source_retained": True,
+            "manual_recovery_available": True,
+            "failure_count": upscale.failure_count,
+        },
+        error=error_message,
+    )
+
+
+async def _schedule_retry(
+    db: AsyncSession,
+    *,
+    upscale_task_id: str,
+    error_message: str,
+    retry_action: str,
+    retryable: bool = True,
+) -> None:
+    from app.tasks.video_upscale_tasks import download_remote_result, execute_local, finalize, poll_remote, submit_remote
+
+    upscale, task = await _load_pair(db, upscale_task_id, for_update=True)
+    if not upscale or not task:
+        return
+    snapshot = _snapshot(task)
+    upscale.failure_count = int(upscale.failure_count or 0) + 1
+    max_failures = _max_failures(snapshot)
+    if not retryable or upscale.failure_count >= max_failures:
+        await db.commit()
+        await _final_fail(db, upscale_task_id=upscale_task_id, error_message=error_message)
+        return
+
+    next_retry_at = _retry_at(upscale.failure_count)
+    upscale.status = VideoUpscaleTaskStatus.RETRY_WAITING.value
+    upscale.stage = VideoUpscaleStage.RETRY_WAITING.value
+    upscale.last_error = error_message
+    upscale.next_retry_at = next_retry_at
+    upscale.lease_until = None
+    upscale.lease_token = None
+    set_owner_stage(task, upscale_stage_value(task, ChatGenerationPipelineStage.UPSCALE_RETRY_WAITING))
+    await db.commit()
+
+    task_map = {
+        "local": (execute_local, settings.VIDEO_UPSCALE_LOCAL_QUEUE),
+        "submit": (submit_remote, settings.VIDEO_UPSCALE_REMOTE_QUEUE),
+        "poll": (poll_remote, settings.VIDEO_UPSCALE_REMOTE_QUEUE),
+        "download": (download_remote_result, settings.VIDEO_UPSCALE_REMOTE_QUEUE),
+        "finalize": (finalize, settings.VIDEO_UPSCALE_LOCAL_QUEUE),
+    }
+    celery_task, queue = task_map[retry_action]
+    enqueue_error: str | None = None
+    try:
+        celery_task.apply_async(args=[upscale_task_id], countdown=_countdown(next_retry_at), queue=queue)
+    except Exception as exc:
+        enqueue_error = str(exc)
+    log_video_upscale_event(
+        event_type="upscale_retry_scheduled" if enqueue_error is None else "upscale_retry_enqueue_failed",
+        event_status="retry_waiting" if enqueue_error is None else "failed",
+        task=task,
+        upscale_task=upscale,
+        message=error_message,
+        detail={
+            "retry_action": retry_action,
+            "failure_count": upscale.failure_count,
+            "max_failures": max_failures,
+            "next_retry_at": next_retry_at,
+            "enqueue_error": enqueue_error,
+        },
+        error=enqueue_error or error_message,
+    )
+
+
+async def _queue_finalize(
+    db: AsyncSession,
+    *,
+    upscale_task_id: str,
+    final_path: str,
+    reason: str,
+) -> None:
+    upscale, task = await _load_pair(db, upscale_task_id, for_update=True)
+    if not upscale or not task:
+        return
+    if not is_valid_file(final_path):
+        raise RuntimeError(f"超分最终视频不存在或为空: {final_path}")
+    upscale.final_local_path = final_path
+    upscale.status = VideoUpscaleTaskStatus.PROCESSING.value
+    upscale.stage = VideoUpscaleStage.FINALIZING.value
+    upscale.lease_until = None
+    upscale.lease_token = None
+    upscale.next_retry_at = None
+    set_owner_stage(task, upscale_stage_value(task, ChatGenerationPipelineStage.UPSCALE_FINALIZING))
+    await db.commit()
+
+    from app.tasks.video_upscale_tasks import finalize
+
+    _safe_apply_async(
+        finalize,
+        args=[upscale_task_id],
+        queue=settings.VIDEO_UPSCALE_LOCAL_QUEUE,
+        task=task,
+        upscale_task=upscale,
+        action="finalize",
+    )
+    log_video_upscale_event(
+        event_type="upscale_finalize_enqueued",
+        event_status="queued",
+        task=task,
+        upscale_task=upscale,
+        detail={"reason": reason, "final_local_path": final_path},
+    )
+
+
+async def _finalize_success(db: AsyncSession, *, upscale_task_id: str, final_path: str) -> None:
+    upscale, task = await _load_pair(db, upscale_task_id, for_update=False)
+    if not upscale or not task:
+        return
+    snapshot = _snapshot(task)
+    info = await probe_video(final_path)
+    expected_width = int(snapshot.get("target_width") or upscale.target_width or 0)
+    expected_height = int(snapshot.get("target_height") or upscale.target_height or 0)
+    processor_key = str(snapshot.get("processor_key") or upscale.processor_key or "")
+    if processor_key in LOCAL_PROCESSOR_KEYS:
+        if abs(info.width - expected_width) > 2 or abs(info.height - expected_height) > 2:
+            raise RuntimeError(
+                f"本地超分最终视频尺寸不符合快照: 实际 {info.width}x{info.height}，预期 {expected_width}x{expected_height}"
+            )
+    else:
+        expected_short_edge = int(snapshot.get("target_short_edge_pixels") or min(expected_width, expected_height))
+        actual_short_edge = min(info.width, info.height)
+        short_edge_tolerance = max(4, int(round(expected_short_edge * 0.03)))
+        if abs(actual_short_edge - expected_short_edge) > short_edge_tolerance:
+            raise RuntimeError(
+                f"火山超分最终视频短边不符合目标档位: 实际 {actual_short_edge}，目标 {expected_short_edge}"
+            )
+        if expected_width <= 0 or expected_height <= 0 or info.width <= 0 or info.height <= 0:
+            raise RuntimeError("火山超分最终视频宽高无效")
+        expected_ratio = expected_width / expected_height
+        actual_ratio = info.width / info.height
+        ratio_error = abs(actual_ratio - expected_ratio) / expected_ratio
+        if ratio_error > 0.03:
+            raise RuntimeError(
+                f"火山超分最终视频比例异常: 实际 {info.width}:{info.height}，预期约 {expected_width}:{expected_height}"
+            )
+    try:
+        source_duration = float(upscale.source_duration_seconds or 0)
+    except (TypeError, ValueError):
+        source_duration = 0.0
+    if source_duration > 0 and info.duration_seconds > 0:
+        duration_tolerance = max(1.0, source_duration * 0.03)
+        if abs(info.duration_seconds - source_duration) > duration_tolerance:
+            raise RuntimeError(
+                f"超分最终视频时长异常: 源视频 {source_duration:.3f}s，最终视频 {info.duration_seconds:.3f}s"
+            )
+
+    date_dir = _date_dir(task)
+    cover_url, cover_path = await async_create_video_cover_for_local_video(
+        record_id=task.id,
+        video_path=final_path,
+        date_dir=date_dir,
+        log_prefix=f"超分最终视频封面生成 task_id={task.id}",
+    )
+    if not cover_url or not cover_path:
+        raise RuntimeError("超分最终视频封面生成失败")
+
+    upscale, task = await _load_pair(db, upscale_task_id, for_update=True)
+    if not upscale or not task:
+        return
+    if owner_is_completed(task) and task.video_url:
+        return
+
+    final_url = f"/generate/videos/{date_dir}/{task.id}.mp4"
+    now = _now()
+    task.video_url = final_url
+    task.video_cover_url = cover_url
+    if isinstance(task, ChatGenerationTask):
+        task.status = ChatGenerationTaskStatus.COMPLETED.value
+        task.pipeline_stage = ChatGenerationPipelineStage.DONE.value
+    else:
+        task.status = "completed"
+        task.pipeline_stage = "done"
+    task.generated_at = now
+    task.error_message = None
+    if isinstance(task, ChatGenerationTask):
+        task.retry_count = 0
+
+    upscale.status = VideoUpscaleTaskStatus.COMPLETED.value
+    upscale.stage = VideoUpscaleStage.COMPLETED.value
+    upscale.completed_at = now
+    upscale.final_local_path = final_path
+    upscale.final_resource_url = final_url
+    upscale.final_file_size_bytes = safe_file_size(final_path)
+    upscale.effective_target_width = info.width
+    upscale.effective_target_height = info.height
+    upscale.last_error = None
+    upscale.next_retry_at = None
+    upscale.lease_until = None
+    upscale.lease_token = None
+
+    if isinstance(task, ChatGenerationTask):
+        await record_chat_task_generated_resource(
+            db,
+            task,
+            resource_url=final_url,
+            storage_path=final_path,
+            file_size_bytes=upscale.final_file_size_bytes,
+            remote_url=upscale.source_remote_url,
+            generated_at=now,
+        )
+        await sync_chat_generation_task_media_token_snapshot(db, task)
+        await notify_chat_generation_task_finished(db, task)
+        await aggregate_parent_for_child(db, task)
+    else:
+        await record_generation_record_generated_resource(
+            db,
+            task,
+            resource_url=final_url,
+            storage_path=final_path,
+            file_size_bytes=upscale.final_file_size_bytes,
+            remote_url=upscale.source_remote_url,
+            generated_at=now,
+        )
+        await sync_generation_record_media_token_snapshot(db, task)
+
+    source_path = str(upscale.source_local_path or "")
+    delete_source_after_success = bool(snapshot.get("delete_source_after_success", True))
+    if not delete_source_after_success:
+        upscale.source_delete_error = VIDEO_UPSCALE_SOURCE_RETAINED_MARKER
+    await db.commit()
+    if delete_source_after_success and source_path and os.path.abspath(source_path) != os.path.abspath(final_path):
+        removed = safe_remove(source_path)
+        cleanup_error = None if removed else f"源视频删除失败: {source_path}"
+        cleanup_result = await db.execute(
+            select(VideoUpscaleTask).where(VideoUpscaleTask.id == upscale_task_id).with_for_update().limit(1)
+        )
+        cleanup_task = cleanup_result.scalar_one_or_none()
+        if cleanup_task:
+            cleanup_task.source_deleted_at = _now() if removed else None
+            cleanup_task.source_delete_error = cleanup_error
+            await db.commit()
+        if removed:
+            log_video_upscale_event(
+                event_type="upscale_source_cleanup_success",
+                task=task,
+                upscale_task=cleanup_task or upscale,
+                detail={"source_local_path": source_path, "delete_source_after_success": True},
+            )
+        else:
+            log_video_upscale_event(
+                event_type="upscale_source_cleanup_failed",
+                event_status="failed",
+                task=task,
+                upscale_task=cleanup_task or upscale,
+                message="超分完成后源视频删除失败",
+                detail={"source_local_path": source_path, "delete_source_after_success": True},
+                error="source_cleanup_failed",
+            )
+    elif not delete_source_after_success:
+        log_video_upscale_event(
+            event_type="upscale_source_retained_by_snapshot",
+            event_status="success",
+            task=task,
+            upscale_task=upscale,
+            detail={
+                "source_local_path": source_path,
+                "delete_source_after_success": False,
+                "source_retained_by_config": True,
+            },
+        )
+    log_video_upscale_event(
+        event_type="upscale_success",
+        task=task,
+        upscale_task=upscale,
+        detail={
+            "final_url": final_url,
+            "cover_url": cover_url,
+            "width": info.width,
+            "height": info.height,
+            "file_size_bytes": upscale.final_file_size_bytes,
+        },
+    )
+
+
+async def run_local_upscale(db: AsyncSession, upscale_task_id: str) -> None:
+    claimed = await _claim(
+        db,
+        upscale_task_id=upscale_task_id,
+        stage=VideoUpscaleStage.LOCAL_PROCESSING.value,
+        chat_stage=ChatGenerationPipelineStage.UPSCALE_PROCESSING.value,
+        increment_attempt=True,
+        lease_seconds=int(settings.VIDEO_UPSCALE_LOCAL_TIMEOUT_SECONDS or 3600) + 300,
+    )
+    if not claimed:
+        return
+    upscale, task, snapshot = claimed
+    processor = _processor(snapshot)
+    final_path, _ = _final_video_path(task)
+    log_video_upscale_event(event_type="upscale_local_start", task=task, upscale_task=upscale)
+    try:
+        await execute_local_ffmpeg_crop(
+            source_path=str(upscale.source_local_path or ""),
+            final_path=final_path,
+            target_width=int(snapshot.get("target_width") or upscale.target_width),
+            target_height=int(snapshot.get("target_height") or upscale.target_height),
+            timeout_seconds=int(processor.get("timeout_seconds") or settings.VIDEO_UPSCALE_LOCAL_TIMEOUT_SECONDS),
+        )
+        log_video_upscale_event(
+            event_type="upscale_local_success",
+            task=task,
+            upscale_task=upscale,
+            detail={"final_local_path": final_path},
+        )
+    except Exception as exc:
+        await db.rollback()
+        await _schedule_retry(
+            db,
+            upscale_task_id=upscale_task_id,
+            error_message=f"本地 FFmpeg 超分失败: {exc}",
+            retry_action="local",
+            retryable=True,
+        )
+        return
+
+    try:
+        await _queue_finalize(
+            db,
+            upscale_task_id=upscale_task_id,
+            final_path=final_path,
+            reason="local_upscale_completed",
+        )
+    except Exception as exc:
+        await db.rollback()
+        await _schedule_retry(
+            db,
+            upscale_task_id=upscale_task_id,
+            error_message=f"本地超分结果进入最终化失败: {exc}",
+            retry_action="finalize",
+            retryable=True,
+        )
+
+
+async def _select_remote_input(db: AsyncSession, upscale: VideoUpscaleTask, processor: dict[str, Any]) -> tuple[str, str]:
+    remote_url = str(upscale.source_remote_url or "").strip()
+    expires_at = _aware(upscale.source_remote_url_expires_at)
+    now = _now()
+    threshold = max(0, int(settings.VIDEO_UPSCALE_REMOTE_URL_PROBE_THRESHOLD_SECONDS or 600))
+    use_remote = False
+    probe_status = VideoUpscaleProbeStatus.NOT_CHECKED.value
+
+    # 远程源地址已被火山明确判定不可访问后，后续同一处理器重提必须固定使用本地签名地址。
+    if int(upscale.input_source_fallback_count or 0) > 0:
+        signed_url = build_local_source_signed_url(
+            str(upscale.source_local_path or ""),
+            int(processor.get("source_url_expire_seconds") or settings.VIDEO_UPSCALE_LOCAL_SIGNED_URL_EXPIRE_SECONDS),
+        )
+        return signed_url, VideoUpscaleInputSourceType.LOCAL_SIGNED.value
+
+    if remote_url:
+        if expires_at is not None:
+            remaining = (expires_at - now).total_seconds()
+            if remaining > threshold:
+                use_remote = True
+            elif remaining > 0:
+                use_remote = await probe_remote_url(remote_url)
+                probe_status = VideoUpscaleProbeStatus.SUCCESS.value if use_remote else VideoUpscaleProbeStatus.FAILED.value
+            else:
+                probe_status = VideoUpscaleProbeStatus.EXPIRED.value
+        else:
+            use_remote = await probe_remote_url(remote_url)
+            probe_status = VideoUpscaleProbeStatus.SUCCESS.value if use_remote else VideoUpscaleProbeStatus.UNPARSABLE.value
+
+    if probe_status != VideoUpscaleProbeStatus.NOT_CHECKED.value:
+        upscale.source_remote_url_last_probe_at = now
+        upscale.source_remote_url_probe_status = probe_status
+        await db.commit()
+
+    if use_remote:
+        return remote_url, VideoUpscaleInputSourceType.PROVIDER_REMOTE.value
+    signed_url = build_local_source_signed_url(
+        str(upscale.source_local_path or ""),
+        int(processor.get("source_url_expire_seconds") or settings.VIDEO_UPSCALE_LOCAL_SIGNED_URL_EXPIRE_SECONDS),
+    )
+    return signed_url, VideoUpscaleInputSourceType.LOCAL_SIGNED.value
+
+
+async def run_remote_submit(db: AsyncSession, upscale_task_id: str, *, count_attempt: bool = True) -> None:
+    claimed = await _claim(
+        db,
+        upscale_task_id=upscale_task_id,
+        stage=VideoUpscaleStage.REMOTE_SUBMITTING.value,
+        chat_stage=ChatGenerationPipelineStage.UPSCALE_PROCESSING.value,
+        increment_attempt=count_attempt,
+        lease_seconds=300,
+    )
+    if not claimed:
+        return
+    upscale, task, snapshot = claimed
+    processor = _processor(snapshot)
+    log_video_upscale_event(
+        event_type="upscale_provider_submit_start",
+        task=task,
+        upscale_task=upscale,
+        detail={
+            "processor_key": upscale.processor_key,
+            "target_resolution": snapshot.get("target_resolution"),
+            "target_width": snapshot.get("target_width"),
+            "target_height": snapshot.get("target_height"),
+        },
+    )
+    try:
+        source_width = int(upscale.source_width or 0)
+        source_height = int(upscale.source_height or 0)
+        source_short_edge = min(source_width, source_height)
+        source_long_edge = max(source_width, source_height)
+        if upscale.processor_key == "volc_large_model_v1":
+            if not (360 <= source_short_edge <= 1080 and 360 <= source_long_edge <= 1920):
+                raise VolcMediaKitError(
+                    f"火山画质增强大模型输入尺寸不支持: {source_width}x{source_height}，短边需 360-1080、长边需 360-1920",
+                    code="UnsupportedInputResolution",
+                    retryable=False,
+                )
+            source_info = await probe_video(str(upscale.source_local_path or ""))
+            hdr_transfers = {"smpte2084", "arib-std-b67"}
+            if str(source_info.color_transfer or "").strip().lower() in hdr_transfers:
+                raise VolcMediaKitError(
+                    f"火山画质增强大模型仅支持 SDR 视频，当前 color_transfer={source_info.color_transfer}",
+                    code="UnsupportedHdrInput",
+                    retryable=False,
+                )
+        elif upscale.processor_key in {"volc_standard_v1", "volc_professional_v1"}:
+            if source_short_edge > 1440 or source_long_edge > 2560:
+                raise VolcMediaKitError(
+                    f"火山标准版/专业版输入视频最高支持 2K，当前 {source_width}x{source_height}",
+                    code="UnsupportedInputResolution",
+                    retryable=False,
+                )
+        source_url, source_type = await _select_remote_input(db, upscale, processor)
+        submit_result = await submit_video_enhance(
+            processor_key=upscale.processor_key,
+            video_url=source_url,
+            target_resolution=str(snapshot.get("target_resolution") or task.resolution or ""),
+            target_width=int(snapshot.get("target_width") or upscale.target_width),
+            target_height=int(snapshot.get("target_height") or upscale.target_height),
+            processor=processor,
+            client_token=f"{upscale.id}-{int(upscale.attempt_count or 0)}-{int(upscale.input_source_fallback_count or 0)}",
+        )
+        upscale, task = await _load_pair(db, upscale_task_id, for_update=True)
+        if not upscale or not task:
+            return
+        upscale.provider_task_id = submit_result.task_id
+        upscale.provider_submitted_at = _now()
+        upscale.provider_request_json = json.dumps(_sanitize_provider_payload(submit_result.request_payload), ensure_ascii=False, default=str)
+        upscale.provider_response_json = json.dumps(submit_result.response_payload, ensure_ascii=False, default=str)
+        upscale.input_source_type = source_type
+        upscale.status = VideoUpscaleTaskStatus.PROCESSING.value
+        upscale.stage = VideoUpscaleStage.REMOTE_POLLING.value
+        upscale.lease_until = None
+        upscale.lease_token = None
+        set_owner_stage(task, upscale_stage_value(task, ChatGenerationPipelineStage.UPSCALE_POLLING))
+        await db.commit()
+
+        from app.tasks.video_upscale_tasks import poll_remote
+        _safe_apply_async(
+            poll_remote,
+            args=[upscale_task_id],
+            countdown=max(5, int(processor.get("poll_interval_seconds") or 30)),
+            queue=settings.VIDEO_UPSCALE_REMOTE_QUEUE,
+            task=task,
+            upscale_task=upscale,
+            action="poll_after_submit",
+        )
+        log_video_upscale_event(
+            event_type="upscale_provider_submit_success",
+            task=task,
+            upscale_task=upscale,
+            remote_request_id=submit_result.request_id,
+            detail={"provider_task_id": submit_result.task_id, "input_source_type": source_type},
+        )
+    except VolcMediaKitError as exc:
+        log_video_upscale_event(
+            event_type="upscale_provider_submit_failed",
+            event_status="failed",
+            task=task,
+            upscale_task=upscale,
+            remote_request_id=exc.request_id,
+            message=str(exc),
+            detail=exc.log_detail(),
+            error=str(exc),
+        )
+        await db.rollback()
+        await _persist_provider_error_payload(
+            db,
+            upscale_task_id=upscale_task_id,
+            payload=exc.response_payload,
+        )
+        await _schedule_retry(
+            db,
+            upscale_task_id=upscale_task_id,
+            error_message=f"火山超分提交失败: {exc}",
+            retry_action="submit",
+            retryable=exc.retryable,
+        )
+    except Exception as exc:
+        log_video_upscale_event(
+            event_type="upscale_provider_submit_failed",
+            event_status="failed",
+            task=task,
+            upscale_task=upscale,
+            message=str(exc),
+            error=str(exc),
+        )
+        await db.rollback()
+        await _schedule_retry(
+            db,
+            upscale_task_id=upscale_task_id,
+            error_message=f"火山超分提交失败: {exc}",
+            retry_action="submit",
+        )
+
+
+async def run_remote_poll(db: AsyncSession, upscale_task_id: str) -> None:
+    claimed = await _claim(
+        db,
+        upscale_task_id=upscale_task_id,
+        stage=VideoUpscaleStage.REMOTE_POLLING.value,
+        chat_stage=ChatGenerationPipelineStage.UPSCALE_POLLING.value,
+        increment_attempt=False,
+        lease_seconds=300,
+    )
+    if not claimed:
+        return
+    upscale, task, snapshot = claimed
+    processor = _processor(snapshot)
+    provider_task_id = str(upscale.provider_task_id or "").strip()
+    if not provider_task_id:
+        await _schedule_retry(
+            db,
+            upscale_task_id=upscale_task_id,
+            error_message="火山超分任务缺少 provider_task_id",
+            retry_action="submit",
+            retryable=True,
+        )
+        return
+    log_video_upscale_event(
+        event_type="upscale_provider_poll_start",
+        task=task,
+        upscale_task=upscale,
+        detail={"provider_task_id": provider_task_id},
+    )
+    try:
+        query_result = await query_task(
+            provider_task_id,
+            request_timeout_seconds=int(processor.get("request_timeout_seconds") or 30),
+        )
+        upscale, task = await _load_pair(db, upscale_task_id, for_update=True)
+        if not upscale or not task:
+            return
+        upscale.provider_response_json = json.dumps(query_result.response_payload, ensure_ascii=False, default=str)
+        upscale.lease_until = None
+        upscale.lease_token = None
+
+        if query_result.status == "running":
+            provider_submitted_at = _aware(upscale.provider_submitted_at) or _aware(upscale.started_at) or _now()
+            poll_timeout = max(60, int(processor.get("poll_timeout_seconds") or 7200))
+            if (_now() - provider_submitted_at).total_seconds() > poll_timeout:
+                await db.commit()
+                await _schedule_retry(
+                    db,
+                    upscale_task_id=upscale_task_id,
+                    error_message=f"火山超分轮询超过 {poll_timeout} 秒",
+                    retry_action="submit",
+                    retryable=True,
+                )
+                return
+            await db.commit()
+            from app.tasks.video_upscale_tasks import poll_remote
+            _safe_apply_async(
+                poll_remote,
+                args=[upscale_task_id],
+                countdown=max(5, int(processor.get("poll_interval_seconds") or 30)),
+                queue=settings.VIDEO_UPSCALE_REMOTE_QUEUE,
+                task=task,
+                upscale_task=upscale,
+                action="poll_running",
+            )
+            log_video_upscale_event(
+                event_type="upscale_provider_poll_running",
+                event_status="running",
+                task=task,
+                upscale_task=upscale,
+                remote_request_id=query_result.request_id,
+            )
+            return
+
+        if query_result.status == "failed":
+            if (
+                upscale.input_source_type == VideoUpscaleInputSourceType.PROVIDER_REMOTE.value
+                and int(upscale.input_source_fallback_count or 0) < 1
+                and is_remote_input_access_error(query_result.error)
+            ):
+                upscale.input_source_fallback_count = int(upscale.input_source_fallback_count or 0) + 1
+                upscale.provider_task_id = None
+                upscale.provider_submitted_at = None
+                upscale.provider_output_url = None
+                upscale.status = VideoUpscaleTaskStatus.PENDING.value
+                upscale.stage = VideoUpscaleStage.QUEUED.value
+                await db.commit()
+                from app.tasks.video_upscale_tasks import submit_remote
+                _safe_apply_async(
+                    submit_remote,
+                    args=[upscale_task_id],
+                    kwargs={"count_attempt": False},
+                    queue=settings.VIDEO_UPSCALE_REMOTE_QUEUE,
+                    task=task,
+                    upscale_task=upscale,
+                    action="submit_local_source_fallback",
+                )
+                log_video_upscale_event(
+                    event_type="upscale_source_fallback_local",
+                    event_status="retrying",
+                    task=task,
+                    upscale_task=upscale,
+                    detail={"provider_error": query_result.error},
+                )
+                return
+            error = query_result.error or {}
+            code = str(error.get("code") or "")
+            error_type = str(error.get("type") or "")
+            retryable = code not in {"InvalidParameter", "Unauthorized", "Forbidden", "NotFound"} and error_type not in {
+                "BadRequest",
+                "AuthError",
+            }
+            log_video_upscale_event(
+                event_type="upscale_provider_task_failed",
+                event_status="failed",
+                task=task,
+                upscale_task=upscale,
+                remote_request_id=query_result.request_id,
+                message=str(error.get("message") or "火山超分任务失败"),
+                detail={
+                    "error_code": code,
+                    "error_type": error_type,
+                    "error_param": error.get("param"),
+                    "provider_error": error,
+                    "retryable": retryable,
+                },
+                error=str(error.get("message") or code),
+            )
+            await db.commit()
+            await _schedule_retry(
+                db,
+                upscale_task_id=upscale_task_id,
+                error_message=f"火山超分任务失败: {code} {error.get('message') or ''}".strip(),
+                retry_action="submit",
+                retryable=retryable,
+            )
+            return
+
+        result = query_result.result or {}
+        output_url = str(result.get("video_url") or "").strip()
+        if not output_url:
+            await db.commit()
+            await _schedule_retry(
+                db,
+                upscale_task_id=upscale_task_id,
+                error_message="火山超分任务已完成但未返回 result.video_url",
+                retry_action="poll",
+                retryable=True,
+            )
+            return
+        upscale.provider_output_url = output_url
+        upscale.provider_output_url_expires_at = (
+            datetime.fromtimestamp(query_result.expires_at, tz=timezone.utc) if query_result.expires_at else None
+        )
+        upscale.status = VideoUpscaleTaskStatus.PROCESSING.value
+        upscale.stage = VideoUpscaleStage.RESULT_READY.value
+        set_owner_stage(task, upscale_stage_value(task, ChatGenerationPipelineStage.UPSCALE_DOWNLOADING))
+        await db.commit()
+        from app.tasks.video_upscale_tasks import download_remote_result
+        _safe_apply_async(
+            download_remote_result,
+            args=[upscale_task_id],
+            queue=settings.VIDEO_UPSCALE_REMOTE_QUEUE,
+            task=task,
+            upscale_task=upscale,
+            action="download_remote_result",
+        )
+        log_video_upscale_event(
+            event_type="upscale_provider_poll_success",
+            task=task,
+            upscale_task=upscale,
+            remote_request_id=query_result.request_id,
+            detail={"provider_output_url_expires_at": upscale.provider_output_url_expires_at},
+        )
+    except VolcMediaKitError as exc:
+        log_video_upscale_event(
+            event_type="upscale_provider_poll_failed",
+            event_status="failed",
+            task=task,
+            upscale_task=upscale,
+            remote_request_id=exc.request_id,
+            message=str(exc),
+            detail=exc.log_detail(),
+            error=str(exc),
+        )
+        await db.rollback()
+        await _persist_provider_error_payload(
+            db,
+            upscale_task_id=upscale_task_id,
+            payload=exc.response_payload,
+        )
+        await _schedule_retry(
+            db,
+            upscale_task_id=upscale_task_id,
+            error_message=f"火山超分查询失败: {exc}",
+            retry_action="poll",
+            retryable=exc.retryable,
+        )
+    except Exception as exc:
+        log_video_upscale_event(
+            event_type="upscale_provider_poll_failed",
+            event_status="failed",
+            task=task,
+            upscale_task=upscale,
+            message=str(exc),
+            error=str(exc),
+        )
+        await db.rollback()
+        await _schedule_retry(
+            db,
+            upscale_task_id=upscale_task_id,
+            error_message=f"火山超分查询失败: {exc}",
+            retry_action="poll",
+        )
+
+
+async def run_finalize_upscale(db: AsyncSession, upscale_task_id: str) -> None:
+    claimed = await _claim(
+        db,
+        upscale_task_id=upscale_task_id,
+        stage=VideoUpscaleStage.FINALIZING.value,
+        chat_stage=ChatGenerationPipelineStage.UPSCALE_FINALIZING.value,
+        increment_attempt=False,
+        lease_seconds=max(300, int(settings.VIDEO_COVER_TIMEOUT_SECONDS or 15) + 300),
+    )
+    if not claimed:
+        return
+    upscale, task, _snapshot_data = claimed
+    final_path = str(upscale.final_local_path or "").strip()
+    if not final_path:
+        final_path, _ = _final_video_path(task)
+    log_video_upscale_event(
+        event_type="upscale_finalize_start",
+        task=task,
+        upscale_task=upscale,
+        detail={"final_local_path": final_path},
+    )
+    try:
+        await _finalize_success(db, upscale_task_id=upscale_task_id, final_path=final_path)
+        log_video_upscale_event(
+            event_type="upscale_finalize_success",
+            task=task,
+            upscale_task=upscale,
+            detail={"final_local_path": final_path},
+        )
+    except Exception as exc:
+        log_video_upscale_event(
+            event_type="upscale_finalize_failed",
+            event_status="failed",
+            task=task,
+            upscale_task=upscale,
+            message=str(exc),
+            detail={"final_local_path": final_path},
+            error=str(exc),
+        )
+        await db.rollback()
+        await _schedule_retry(
+            db,
+            upscale_task_id=upscale_task_id,
+            error_message=f"超分最终化失败: {exc}",
+            retry_action="finalize",
+            retryable=True,
+        )
+
+
+async def run_remote_result_download(db: AsyncSession, upscale_task_id: str) -> None:
+    claimed = await _claim(
+        db,
+        upscale_task_id=upscale_task_id,
+        stage=VideoUpscaleStage.RESULT_DOWNLOADING.value,
+        chat_stage=ChatGenerationPipelineStage.UPSCALE_DOWNLOADING.value,
+        increment_attempt=False,
+        lease_seconds=int(settings.VIDEO_UPSCALE_REMOTE_RESULT_DOWNLOAD_TIMEOUT_SECONDS or 600) + 120,
+    )
+    if not claimed:
+        return
+    upscale, task, snapshot = claimed
+    expires_at = _aware(upscale.provider_output_url_expires_at)
+    if upscale.provider_task_id and expires_at and (expires_at - _now()).total_seconds() < 2 * 3600:
+        upscale.status = VideoUpscaleTaskStatus.PROCESSING.value
+        upscale.stage = VideoUpscaleStage.REMOTE_POLLING.value
+        upscale.lease_until = None
+        upscale.lease_token = None
+        set_owner_stage(task, upscale_stage_value(task, ChatGenerationPipelineStage.UPSCALE_POLLING))
+        await db.commit()
+        from app.tasks.video_upscale_tasks import poll_remote
+        _safe_apply_async(
+            poll_remote,
+            args=[upscale_task_id],
+            queue=settings.VIDEO_UPSCALE_REMOTE_QUEUE,
+            task=task,
+            upscale_task=upscale,
+            action="renew_remote_result",
+        )
+        log_video_upscale_event(
+            event_type="upscale_provider_result_renew_query",
+            event_status="queued",
+            task=task,
+            upscale_task=upscale,
+            detail={"provider_output_url_expires_at": expires_at},
+        )
+        return
+    output_url = str(upscale.provider_output_url or "").strip()
+    if not output_url:
+        await _schedule_retry(
+            db,
+            upscale_task_id=upscale_task_id,
+            error_message="火山超分结果下载缺少 provider_output_url",
+            retry_action="poll",
+        )
+        return
+    final_path, _ = _final_video_path(task)
+    log_video_upscale_event(
+        event_type="upscale_output_download_start",
+        task=task,
+        upscale_task=upscale,
+        detail={"provider_output_url_expires_at": upscale.provider_output_url_expires_at},
+    )
+    try:
+        await download_video_to_path(
+            output_url,
+            final_path,
+            int(settings.VIDEO_UPSCALE_REMOTE_RESULT_DOWNLOAD_TIMEOUT_SECONDS or 600),
+        )
+        log_video_upscale_event(
+            event_type="upscale_output_download_success",
+            task=task,
+            upscale_task=upscale,
+            detail={"final_local_path": final_path, "file_size_bytes": safe_file_size(final_path)},
+        )
+    except Exception as exc:
+        log_video_upscale_event(
+            event_type="upscale_output_download_failed",
+            event_status="failed",
+            task=task,
+            upscale_task=upscale,
+            message=str(exc),
+            detail={"provider_output_url_expires_at": upscale.provider_output_url_expires_at},
+            error=str(exc),
+        )
+        await db.rollback()
+        expires_at = _aware(upscale.provider_output_url_expires_at)
+        action = "submit" if expires_at and expires_at <= _now() else "download"
+        await _schedule_retry(
+            db,
+            upscale_task_id=upscale_task_id,
+            error_message=f"火山超分结果下载失败: {exc}",
+            retry_action=action,
+            retryable=True,
+        )
+        return
+
+    try:
+        await _queue_finalize(
+            db,
+            upscale_task_id=upscale_task_id,
+            final_path=final_path,
+            reason="remote_result_download_completed",
+        )
+    except Exception as exc:
+        await db.rollback()
+        await _schedule_retry(
+            db,
+            upscale_task_id=upscale_task_id,
+            error_message=f"火山超分结果进入最终化失败: {exc}",
+            retry_action="finalize",
+            retryable=True,
+        )
+
+
+async def recover_video_upscale_tasks_once(db: AsyncSession) -> dict[str, Any]:
+    now = _now()
+    batch_size = max(1, int(settings.VIDEO_UPSCALE_RECOVERY_BATCH_SIZE or 50))
+    result = await db.execute(
+        select(VideoUpscaleTask)
+        .where(
+            or_(
+                VideoUpscaleTask.status == VideoUpscaleTaskStatus.PENDING.value,
+                and_(
+                    VideoUpscaleTask.status == VideoUpscaleTaskStatus.PROCESSING.value,
+                    or_(VideoUpscaleTask.lease_until.is_(None), VideoUpscaleTask.lease_until <= now),
+                ),
+                and_(
+                    VideoUpscaleTask.status == VideoUpscaleTaskStatus.RETRY_WAITING.value,
+                    or_(VideoUpscaleTask.next_retry_at.is_(None), VideoUpscaleTask.next_retry_at <= now),
+                ),
+                and_(
+                    VideoUpscaleTask.status == VideoUpscaleTaskStatus.COMPLETED.value,
+                    VideoUpscaleTask.source_local_path.is_not(None),
+                    VideoUpscaleTask.source_deleted_at.is_(None),
+                    or_(
+                        VideoUpscaleTask.source_delete_error.is_(None),
+                        VideoUpscaleTask.source_delete_error != VIDEO_UPSCALE_SOURCE_RETAINED_MARKER,
+                    ),
+                ),
+            )
+        )
+        .order_by(VideoUpscaleTask.updated_at.asc())
+        .limit(batch_size)
+        .with_for_update(skip_locked=True)
+    )
+    tasks = list(result.scalars().all())
+    await db.commit()
+
+    from app.tasks.video_upscale_tasks import download_remote_result, execute_local, finalize, poll_remote, submit_remote
+
+    counts: dict[str, int] = {}
+    for item in tasks:
+        action = ""
+        try:
+            if item.status == VideoUpscaleTaskStatus.COMPLETED.value:
+                action = "cleanup"
+                cleanup_upscale, cleanup_chat_task = await _load_pair(db, str(item.id), for_update=True)
+                if not cleanup_upscale or not cleanup_chat_task:
+                    continue
+                cleanup_snapshot = _snapshot(cleanup_chat_task)
+                if not bool(cleanup_snapshot.get("delete_source_after_success", True)):
+                    cleanup_upscale.source_delete_error = VIDEO_UPSCALE_SOURCE_RETAINED_MARKER
+                    await db.commit()
+                    counts["cleanup_skipped_by_snapshot"] = counts.get("cleanup_skipped_by_snapshot", 0) + 1
+                    log_video_upscale_event(
+                        event_type="upscale_source_retained_by_snapshot",
+                        event_status="success",
+                        task=cleanup_chat_task,
+                        upscale_task=cleanup_upscale,
+                        detail={
+                            "source_local_path": cleanup_upscale.source_local_path,
+                            "recovery": True,
+                            "delete_source_after_success": False,
+                        },
+                    )
+                    continue
+                source_path = str(cleanup_upscale.source_local_path or "")
+                removed = safe_remove(source_path)
+                cleanup_result = await db.execute(
+                    select(VideoUpscaleTask).where(VideoUpscaleTask.id == item.id).with_for_update().limit(1)
+                )
+                cleanup_task = cleanup_result.scalar_one_or_none()
+                if cleanup_task:
+                    cleanup_task.source_deleted_at = _now() if removed else None
+                    cleanup_task.source_delete_error = None if removed else f"源视频删除失败: {source_path}"
+                    await db.commit()
+                counts["cleanup_success" if removed else "cleanup_failed"] = counts.get(
+                    "cleanup_success" if removed else "cleanup_failed", 0
+                ) + 1
+                log_video_upscale_event(
+                    event_type="upscale_source_cleanup_success" if removed else "upscale_source_cleanup_failed",
+                    event_status="success" if removed else "failed",
+                    upscale_task=cleanup_task or item,
+                    detail={"source_local_path": source_path, "recovery": True},
+                    error=None if removed else "source_cleanup_failed",
+                )
+                continue
+
+            if item.stage == VideoUpscaleStage.FINALIZING.value and is_valid_file(item.final_local_path):
+                action = "finalize"
+                finalize.apply_async(args=[item.id], queue=settings.VIDEO_UPSCALE_LOCAL_QUEUE)
+            elif item.processor_key in LOCAL_PROCESSOR_KEYS:
+                action = "local"
+                execute_local.apply_async(args=[item.id], queue=settings.VIDEO_UPSCALE_LOCAL_QUEUE)
+            elif item.provider_output_url and item.stage in {
+                VideoUpscaleStage.RESULT_READY.value,
+                VideoUpscaleStage.RESULT_DOWNLOADING.value,
+            }:
+                output_expires_at = _aware(item.provider_output_url_expires_at)
+                if item.provider_task_id and output_expires_at and (output_expires_at - _now()).total_seconds() < 2 * 3600:
+                    action = "poll"
+                    poll_remote.apply_async(args=[item.id], queue=settings.VIDEO_UPSCALE_REMOTE_QUEUE)
+                else:
+                    action = "download"
+                    download_remote_result.apply_async(args=[item.id], queue=settings.VIDEO_UPSCALE_REMOTE_QUEUE)
+            elif item.provider_task_id:
+                action = "poll"
+                poll_remote.apply_async(args=[item.id], queue=settings.VIDEO_UPSCALE_REMOTE_QUEUE)
+            else:
+                action = "submit"
+                submit_remote.apply_async(args=[item.id], queue=settings.VIDEO_UPSCALE_REMOTE_QUEUE)
+            counts[action] = counts.get(action, 0) + 1
+            log_video_upscale_event(
+                event_type="upscale_recovery_enqueued",
+                upscale_task=item,
+                detail={"action": action},
+            )
+        except Exception as exc:
+            await db.rollback()
+            counts["enqueue_failed"] = counts.get("enqueue_failed", 0) + 1
+            log_video_upscale_event(
+                event_type="upscale_recovery_enqueue_failed",
+                event_status="failed",
+                upscale_task=item,
+                message=str(exc),
+                error=str(exc),
+            )
+    return {"checked": len(tasks), "results": counts}
+
+
+async def reset_failed_upscale_task_for_manual_retry(
+    db: AsyncSession,
+    *,
+    upscale_task_id: str,
+    force_resubmit: bool = False,
+) -> VideoUpscaleTask:
+    upscale, task = await _load_pair(db, upscale_task_id, for_update=True)
+    if not upscale or not task:
+        raise RuntimeError(f"超分任务不存在: {upscale_task_id}")
+    if not is_valid_file(upscale.source_local_path):
+        raise RuntimeError(f"超分源视频不存在，无法人工恢复: {upscale.source_local_path}")
+    restore_owner_for_upscale_retry(task)
+    upscale.status = VideoUpscaleTaskStatus.PENDING.value
+    upscale.stage = VideoUpscaleStage.QUEUED.value
+    upscale.failure_count = 0
+    upscale.last_error = None
+    upscale.failed_at = None
+    upscale.next_retry_at = None
+    upscale.lease_until = None
+    upscale.lease_token = None
+    upscale.manual_retry_count = int(upscale.manual_retry_count or 0) + 1
+    if force_resubmit:
+        upscale.provider_task_id = None
+        upscale.provider_submitted_at = None
+        upscale.provider_output_url = None
+        upscale.provider_output_url_expires_at = None
+    await db.commit()
+    return upscale
diff --git a/video-gen-api/app/services/video_upscale/volc_service.py b/video-gen-api/app/services/video_upscale/volc_service.py
new file mode 100644
index 00000000..e7fe5653
--- /dev/null
+++ b/video-gen-api/app/services/video_upscale/volc_service.py
@@ -0,0 +1,270 @@
+from __future__ import annotations
+
+from dataclasses import dataclass
+from typing import Any
+
+import httpx
+
+from app.config import settings
+from app.enums.video_upscale import VideoUpscaleProcessorKey
+
+
+class VolcMediaKitError(RuntimeError):
+    def __init__(
+        self,
+        message: str,
+        *,
+        code: str | None = None,
+        error_type: str | None = None,
+        param: str | None = None,
+        retryable: bool = True,
+        http_status: int | None = None,
+        request_id: str | None = None,
+        endpoint: str | None = None,
+        response_payload: dict[str, Any] | None = None,
+    ):
+        super().__init__(message)
+        self.code = code
+        self.error_type = error_type
+        self.param = param
+        self.retryable = retryable
+        self.http_status = http_status
+        self.request_id = request_id
+        self.endpoint = endpoint
+        self.response_payload = response_payload or {}
+
+    def log_detail(self) -> dict[str, Any]:
+        return {
+            "endpoint": self.endpoint,
+            "http_status": self.http_status,
+            "request_id": self.request_id,
+            "error_code": self.code,
+            "error_type": self.error_type,
+            "error_param": self.param,
+            "error_message": str(self),
+            "retryable": self.retryable,
+        }
+
+
+@dataclass(slots=True)
+class VolcSubmitResult:
+    task_id: str
+    request_id: str | None
+    request_payload: dict[str, Any]
+    response_payload: dict[str, Any]
+    endpoint: str
+
+
+@dataclass(slots=True)
+class VolcQueryResult:
+    status: str
+    request_id: str | None
+    result: dict[str, Any] | None
+    error: dict[str, Any] | None
+    expires_at: int | None
+    response_payload: dict[str, Any]
+    endpoint: str
+
+
+def _headers() -> dict[str, str]:
+    api_key = str(settings.VOLC_API_KEY or "").strip()
+    if not api_key:
+        raise VolcMediaKitError("VOLC_API_KEY 未配置", code="MissingApiKey", retryable=False)
+    return {"Authorization": f"Bearer {api_key}", "Content-Type": "application/json"}
+
+
+def _base_url() -> str:
+    return str(settings.VOLC_MEDIAKIT_API_BASE or "https://mediakit.cn-beijing.volces.com").rstrip("/")
+
+
+def _error_from_payload(
+    payload: dict[str, Any],
+    default_message: str,
+    *,
+    http_status: int | None = None,
+    endpoint: str | None = None,
+) -> VolcMediaKitError:
+    error = payload.get("error") if isinstance(payload.get("error"), dict) else {}
+    code = str(error.get("code") or "") or None
+    error_type = str(error.get("type") or "") or None
+    param = str(error.get("param") or "") or None
+    message = str(error.get("message") or default_message)
+    retryable = True
+    if http_status in {400, 401, 403, 404, 422}:
+        retryable = False
+    if code in {"InvalidParameter", "Unauthorized", "Forbidden", "NotFound"} or error_type in {"BadRequest", "AuthError"}:
+        retryable = False
+    request_id = str(payload.get("request_id") or "") or None
+    return VolcMediaKitError(
+        message,
+        code=code,
+        error_type=error_type,
+        param=param,
+        retryable=retryable,
+        http_status=http_status,
+        request_id=request_id,
+        endpoint=endpoint,
+        response_payload=payload,
+    )
+
+
+def build_submit_payload(
+    *,
+    processor_key: str,
+    video_url: str,
+    target_resolution: str,
+    target_width: int,
+    target_height: int,
+    processor: dict[str, Any],
+    client_token: str,
+) -> tuple[str, dict[str, Any]]:
+    payload: dict[str, Any] = {
+        "video_url": video_url,
+        "bitrate_level": processor.get("bitrate_level") or "medium",
+        "client_token": client_token[:64],
+    }
+    if processor_key == VideoUpscaleProcessorKey.VOLC_LARGE_MODEL_V1.value:
+        endpoint = "/api/v1/tools/enhance-video-generative"
+        normalized = str(target_resolution or "").strip().lower()
+        if normalized not in {"720p", "1080p", "2k"}:
+            raise VolcMediaKitError(
+                "画质增强大模型仅支持目标分辨率 720p、1080p、2K",
+                code="InvalidResolution",
+                retryable=False,
+                endpoint=endpoint,
+            )
+        payload["resolution"] = normalized
+    elif processor_key in {
+        VideoUpscaleProcessorKey.VOLC_STANDARD_V1.value,
+        VideoUpscaleProcessorKey.VOLC_PROFESSIONAL_V1.value,
+    }:
+        endpoint = "/api/v1/tools/enhance-video"
+        payload["tool_version"] = "standard" if processor_key == VideoUpscaleProcessorKey.VOLC_STANDARD_V1.value else "professional"
+        payload["resolution_limit"] = min(int(target_width), int(target_height))
+        if processor_key == VideoUpscaleProcessorKey.VOLC_STANDARD_V1.value:
+            payload["scene"] = processor.get("scene") or "aigc"
+    else:
+        raise VolcMediaKitError(
+            f"不支持的火山超分处理器: {processor_key}",
+            code="UnsupportedProcessor",
+            retryable=False,
+        )
+    return endpoint, payload
+
+
+async def submit_video_enhance(
+    *,
+    processor_key: str,
+    video_url: str,
+    target_resolution: str,
+    target_width: int,
+    target_height: int,
+    processor: dict[str, Any],
+    client_token: str,
+) -> VolcSubmitResult:
+    endpoint, payload = build_submit_payload(
+        processor_key=processor_key,
+        video_url=video_url,
+        target_resolution=target_resolution,
+        target_width=target_width,
+        target_height=target_height,
+        processor=processor,
+        client_token=client_token,
+    )
+    timeout = max(3, int(processor.get("request_timeout_seconds") or settings.VIDEO_UPSCALE_REMOTE_REQUEST_TIMEOUT_SECONDS))
+    try:
+        async with httpx.AsyncClient(timeout=timeout, follow_redirects=True) as client:
+            response = await client.post(f"{_base_url()}{endpoint}", headers=_headers(), json=payload)
+            try:
+                data = response.json()
+            except Exception:
+                data = {"success": False, "error": {"message": response.text[:2000]}}
+            if response.status_code >= 400:
+                raise _error_from_payload(
+                    data,
+                    f"火山超分提交失败 HTTP {response.status_code}",
+                    http_status=response.status_code,
+                    endpoint=endpoint,
+                )
+    except VolcMediaKitError:
+        raise
+    except (httpx.TimeoutException, httpx.NetworkError) as exc:
+        raise VolcMediaKitError(
+            f"火山超分提交网络异常: {exc}",
+            code="NetworkError",
+            retryable=True,
+            endpoint=endpoint,
+        ) from exc
+
+    if not bool(data.get("success")) or not data.get("task_id"):
+        raise _error_from_payload(data, "火山超分提交失败", endpoint=endpoint)
+    return VolcSubmitResult(
+        task_id=str(data["task_id"]),
+        request_id=str(data.get("request_id")) if data.get("request_id") else None,
+        request_payload=payload,
+        response_payload=data,
+        endpoint=endpoint,
+    )
+
+
+async def query_task(task_id: str, *, request_timeout_seconds: int | None = None) -> VolcQueryResult:
+    endpoint = f"/api/v1/tasks/{task_id}"
+    timeout = max(3, int(request_timeout_seconds or settings.VIDEO_UPSCALE_REMOTE_REQUEST_TIMEOUT_SECONDS))
+    try:
+        async with httpx.AsyncClient(timeout=timeout, follow_redirects=True) as client:
+            response = await client.get(f"{_base_url()}{endpoint}", headers=_headers())
+            try:
+                data = response.json()
+            except Exception:
+                data = {"success": False, "error": {"message": response.text[:2000]}}
+            if response.status_code >= 400:
+                raise _error_from_payload(
+                    data,
+                    f"火山超分任务查询失败 HTTP {response.status_code}",
+                    http_status=response.status_code,
+                    endpoint=endpoint,
+                )
+    except VolcMediaKitError:
+        raise
+    except (httpx.TimeoutException, httpx.NetworkError) as exc:
+        raise VolcMediaKitError(
+            f"火山超分查询网络异常: {exc}",
+            code="NetworkError",
+            retryable=True,
+            endpoint=endpoint,
+        ) from exc
+
+    if not bool(data.get("success")):
+        raise _error_from_payload(data, "火山超分任务查询失败", endpoint=endpoint)
+    status = str(data.get("status") or "").strip().lower()
+    if status not in {"running", "completed", "failed"}:
+        raise VolcMediaKitError(
+            f"火山超分返回未知任务状态: {status}",
+            code="UnknownStatus",
+            retryable=True,
+            request_id=str(data.get("request_id") or "") or None,
+            endpoint=endpoint,
+            response_payload=data,
+        )
+    expires_raw = data.get("expires_at")
+    try:
+        expires_at = int(expires_raw) if expires_raw is not None else None
+    except Exception:
+        expires_at = None
+    return VolcQueryResult(
+        status=status,
+        request_id=str(data.get("request_id")) if data.get("request_id") else None,
+        result=data.get("result") if isinstance(data.get("result"), dict) else None,
+        error=data.get("error") if isinstance(data.get("error"), dict) else None,
+        expires_at=expires_at,
+        response_payload=data,
+        endpoint=endpoint,
+    )
+
+
+def is_remote_input_access_error(error: dict[str, Any] | None) -> bool:
+    if not error:
+        return False
+    text = " ".join(str(error.get(key) or "") for key in ("code", "message", "param", "type")).lower()
+    fragments = ("403", "forbidden", "url expired", "downloadfailed", "urldownloadfail", "download file", "url无法", "下载失败")
+    return any(fragment in text for fragment in fragments)
diff --git a/video-gen-api/app/tasks/celery_app.py b/video-gen-api/app/tasks/celery_app.py
index 43f210a7..a8aee632 100644
--- a/video-gen-api/app/tasks/celery_app.py
+++ b/video-gen-api/app/tasks/celery_app.py
@@ -18,6 +18,7 @@ CELERY_TASK_IMPORTS = (
     "app.tasks.generation_poll_tasks",
     "app.tasks.generation_download_tasks",
     "app.tasks.generation_recovery_tasks",
+    "app.tasks.video_upscale_tasks",
     "app.tasks.hot_opening_replicate_tasks",
     "app.tasks.shot_replicate_tasks",
     "app.tasks.shot_replicate_flow_tasks",
@@ -52,6 +53,14 @@ def _beat_schedule() -> dict:
                 "priority": settings.DOWNLOAD_TASK_PRIORITY_RECOVER,
             },
         }
+    schedule["video-upscale-recovery-every-minute"] = {
+        "task": CeleryTaskName.VIDEO_UPSCALE_RECOVER.value,
+        "schedule": 60,
+        "options": {
+            "queue": RECOVERY_QUEUE,
+            "priority": settings.DOWNLOAD_TASK_PRIORITY_RECOVER,
+        },
+    }
     schedule["private-portrait-sync-due-assets-every-minute"] = {
         "task": CeleryTaskName.PRIVATE_PORTRAIT_SYNC_DUE_ASSETS.value,
         "schedule": 60,
@@ -100,10 +109,24 @@ if broker_url:
             "shot_replicate.split_one_segment": {"ignore_result": True},
             "shot_replicate.start_image_prompt_optimize": {"ignore_result": True},
             "shot_replicate.start_video_prompt_optimize": {"ignore_result": True},
+            CeleryTaskName.VIDEO_UPSCALE_EXECUTE_LOCAL.value: {
+                "ignore_result": True,
+                "soft_time_limit": max(60, int(settings.VIDEO_UPSCALE_LOCAL_TIMEOUT_SECONDS or 3600)) + 60,
+                "time_limit": max(60, int(settings.VIDEO_UPSCALE_LOCAL_TIMEOUT_SECONDS or 3600)) + 300,
+            },
+            CeleryTaskName.VIDEO_UPSCALE_SUBMIT_REMOTE.value: {"ignore_result": True},
+            CeleryTaskName.VIDEO_UPSCALE_POLL_REMOTE.value: {"ignore_result": True},
+            CeleryTaskName.VIDEO_UPSCALE_DOWNLOAD_REMOTE_RESULT.value: {"ignore_result": True},
+            CeleryTaskName.VIDEO_UPSCALE_FINALIZE.value: {"ignore_result": True},
+            CeleryTaskName.VIDEO_UPSCALE_RECOVER.value: {"ignore_result": True},
         },
         worker_prefetch_multiplier=1,
         broker_transport_options={
-            "visibility_timeout": 3600,
+            "visibility_timeout": max(
+                3600,
+                int(settings.VIDEO_UPSCALE_LOCAL_TIMEOUT_SECONDS or 3600) + 600,
+                int(settings.VIDEO_UPSCALE_REMOTE_RESULT_DOWNLOAD_TIMEOUT_SECONDS or 600) + 600,
+            ),
             "queue_order_strategy": "priority",
             "priority_steps": list(range(10)),
             "sep": ":",
@@ -112,6 +135,22 @@ if broker_url:
             CeleryTaskName.CHATAPI_CREATE.value: {"queue": CeleryQueue.GEN_CHATAPI_CREATE.value},
             CeleryTaskName.POLL_GENERATION.value: {"queue": CeleryQueue.GEN_PROVIDER_POLL.value},
             CeleryTaskName.DOWNLOAD_GENERATION_RESULT.value: {"queue": CeleryQueue.GEN_RESULT_DOWNLOAD.value},
+            CeleryTaskName.VIDEO_UPSCALE_EXECUTE_LOCAL.value: {
+                "queue": settings.VIDEO_UPSCALE_LOCAL_QUEUE or CeleryQueue.GEN_VIDEO_UPSCALE_LOCAL.value
+            },
+            CeleryTaskName.VIDEO_UPSCALE_SUBMIT_REMOTE.value: {
+                "queue": settings.VIDEO_UPSCALE_REMOTE_QUEUE or CeleryQueue.GEN_VIDEO_UPSCALE_REMOTE.value
+            },
+            CeleryTaskName.VIDEO_UPSCALE_POLL_REMOTE.value: {
+                "queue": settings.VIDEO_UPSCALE_REMOTE_QUEUE or CeleryQueue.GEN_VIDEO_UPSCALE_REMOTE.value
+            },
+            CeleryTaskName.VIDEO_UPSCALE_DOWNLOAD_REMOTE_RESULT.value: {
+                "queue": settings.VIDEO_UPSCALE_REMOTE_QUEUE or CeleryQueue.GEN_VIDEO_UPSCALE_REMOTE.value
+            },
+            CeleryTaskName.VIDEO_UPSCALE_FINALIZE.value: {
+                "queue": settings.VIDEO_UPSCALE_LOCAL_QUEUE or CeleryQueue.GEN_VIDEO_UPSCALE_LOCAL.value
+            },
+            CeleryTaskName.VIDEO_UPSCALE_RECOVER.value: {"queue": RECOVERY_QUEUE},
             CeleryTaskName.DISPATCH_DUE_POLL.value: {"queue": RECOVERY_QUEUE},
             "hot_opening.start_image_prompt_optimize": {"queue": CeleryQueue.GEN_CHATAPI_CREATE.value},
             "hot_opening.start_video_prompt_optimize": {"queue": CeleryQueue.GEN_CHATAPI_CREATE.value},
diff --git a/video-gen-api/app/tasks/generation_create_tasks.py b/video-gen-api/app/tasks/generation_create_tasks.py
index 81f565a3..01bfcb2f 100644
--- a/video-gen-api/app/tasks/generation_create_tasks.py
+++ b/video-gen-api/app/tasks/generation_create_tasks.py
@@ -91,7 +91,7 @@ def _build_optimized_prompt_by_params(task: ChatGenerationTask) -> str:
 
     duration = _get_first_value(task, "duration")
     aspect_ratio = _get_first_value(task, "aspect_ratio")
-    resolution = _get_first_value(task, "resolution")
+    resolution = _get_first_value(task, "provider_generation_resolution", "resolution")
     image_size = _get_first_value(task, "image_size")
     image_px = _get_first_value(task, "image_px")
     image_proportion = _get_first_value(task, "image_proportion")
diff --git a/video-gen-api/app/tasks/generation_download_tasks.py b/video-gen-api/app/tasks/generation_download_tasks.py
index b97e4bd0..db64c341 100644
--- a/video-gen-api/app/tasks/generation_download_tasks.py
+++ b/video-gen-api/app/tasks/generation_download_tasks.py
@@ -29,7 +29,7 @@ from app.services.celery_download_recovery_service import (
     upsert_download_active,
 )
 from app.services.error_codes import extract_error_message
-from app.services.generation.download_service import download_generation_result
+from app.services.generation.download_service import download_generation_result, download_video_upscale_source
 from app.services.generation.log_service import log_task_event
 from app.services.generation.refund_service import mark_chat_generation_task_failed_and_refund_once
 from app.services.media_token_usage_snapshot_service import sync_chat_generation_task_media_token_snapshot
@@ -560,7 +560,16 @@ async def _run(task_id: str):
             return
 
         try:
-            downloaded = await download_generation_result(task)
+            use_video_upscale = bool(
+                task.gen_type == GenerationType.VIDEO.value
+                and task.video_upscale_enabled_snapshot
+                and task.video_upscale_snapshot_json
+            )
+            downloaded = (
+                await download_video_upscale_source(task)
+                if use_video_upscale
+                else await download_generation_result(task)
+            )
 
             task = await _reload_task(db, task_id)
             if not task:
@@ -572,6 +581,37 @@ async def _run(task_id: str):
                 await remove_download_active(task_id)
                 return
 
+            if use_video_upscale:
+                from app.services.video_upscale.task_service import prepare_video_upscale_task, enqueue_upscale_task
+
+                upscale = await prepare_video_upscale_task(
+                    db,
+                    task=task,
+                    source_local_path=str(downloaded.storage_path or ""),
+                    source_file_size_bytes=downloaded.file_size_bytes,
+                )
+                task.download_lease_until = None
+                task.download_next_retry_at = None
+                task.download_last_error = None
+                task.retry_count = 0
+                await db.commit()
+                await remove_download_active(task.id)
+                await enqueue_upscale_task(db, upscale=upscale, reason="source_download_completed")
+                await _log_download_event(
+                    task,
+                    event_type=ChatGenerationTaskEventType.DOWNLOAD_SUCCESS,
+                    to_status=ChatGenerationTaskStatus.GENERATING.value,
+                    to_stage=ChatGenerationPipelineStage.UPSCALE_QUEUED.value,
+                    detail={
+                        "upscale_source_path": downloaded.storage_path,
+                        "file_size_bytes": downloaded.file_size_bytes,
+                        "download_attempt_count": task.download_attempt_count,
+                        "user_resource_recorded": False,
+                        "cover_generated": False,
+                    },
+                )
+                return
+
             if task.gen_type == GenerationType.IMAGE.value:
                 task.image_url = downloaded.url
             else:
diff --git a/video-gen-api/app/tasks/generation_recovery_tasks.py b/video-gen-api/app/tasks/generation_recovery_tasks.py
index 231bbf99..635867cb 100644
--- a/video-gen-api/app/tasks/generation_recovery_tasks.py
+++ b/video-gen-api/app/tasks/generation_recovery_tasks.py
@@ -52,6 +52,13 @@ async def _run_shot_split_once() -> Dict[str, Any]:
         return await recover_shot_split_tasks_once(db)
 
 
+async def _run_video_upscale_once() -> Dict[str, Any]:
+    from app.services.video_upscale.task_service import recover_video_upscale_tasks_once
+
+    async with async_session() as db:
+        return await recover_video_upscale_tasks_once(db)
+
+
 async def _run_with_execution_lock(
     *,
     lock_key: str,
@@ -155,6 +162,8 @@ async def _run_startup_recovery_once() -> Dict[str, Any]:
     - 创建/提词/视频分析 -> gen_chatapi_create
     - provider poll -> gen_provider_poll
     - 下载/ffmpeg 切片 -> gen_result_download
+    - 本地视频超分 -> gen_video_upscale_local
+    - 火山视频超分 -> gen_video_upscale_remote
     恢复扫描本身只走 gen_recovery，避免堵住业务 worker。
     """
     return await _run_with_execution_lock(
@@ -192,6 +201,12 @@ async def _run_startup_recovery_steps() -> Dict[str, Any]:
             "download_recovery",
             _run_download_once,
         ),
+        (
+            "video_upscale",
+            settings.VIDEO_UPSCALE_RECOVERY_LOCK_KEY,
+            "video_upscale_recovery",
+            _run_video_upscale_once,
+        ),
     ]
 
     for name, lock_key, log_context, runner in steps:
diff --git a/video-gen-api/app/tasks/video_upscale_tasks.py b/video-gen-api/app/tasks/video_upscale_tasks.py
new file mode 100644
index 00000000..7fc66ab6
--- /dev/null
+++ b/video-gen-api/app/tasks/video_upscale_tasks.py
@@ -0,0 +1,109 @@
+from __future__ import annotations
+
+from typing import Any
+
+from app.config import settings
+from app.models.base import async_session
+from app.services.video_upscale.task_service import (
+    recover_video_upscale_tasks_once,
+    run_finalize_upscale,
+    run_local_upscale,
+    run_remote_poll,
+    run_remote_result_download,
+    run_remote_submit,
+)
+from app.tasks.async_runner import run_async
+from app.tasks.celery_app import celery_app
+
+
+async def _run_local(upscale_task_id: str) -> None:
+    async with async_session() as db:
+        await run_local_upscale(db, upscale_task_id)
+
+
+async def _run_submit(upscale_task_id: str, *, count_attempt: bool = True) -> None:
+    async with async_session() as db:
+        await run_remote_submit(db, upscale_task_id, count_attempt=count_attempt)
+
+
+async def _run_poll(upscale_task_id: str) -> None:
+    async with async_session() as db:
+        await run_remote_poll(db, upscale_task_id)
+
+
+async def _run_download(upscale_task_id: str) -> None:
+    async with async_session() as db:
+        await run_remote_result_download(db, upscale_task_id)
+
+
+async def _run_finalize(upscale_task_id: str) -> None:
+    async with async_session() as db:
+        await run_finalize_upscale(db, upscale_task_id)
+
+
+async def _run_recovery() -> dict[str, Any]:
+    async with async_session() as db:
+        return await recover_video_upscale_tasks_once(db)
+
+
+if celery_app:
+
+    @celery_app.task(name="video_upscale.execute_local", bind=True, max_retries=2)
+    def execute_local(self, upscale_task_id: str) -> None:
+        try:
+            return run_async(_run_local(upscale_task_id))
+        except Exception as exc:
+            raise self.retry(exc=exc, countdown=max(5, int(settings.VIDEO_UPSCALE_RETRY_BACKOFF_SECONDS or 60)))
+
+
+    @celery_app.task(name="video_upscale.submit_remote", bind=True, max_retries=2)
+    def submit_remote(self, upscale_task_id: str, count_attempt: bool = True) -> None:
+        try:
+            return run_async(_run_submit(upscale_task_id, count_attempt=count_attempt))
+        except Exception as exc:
+            raise self.retry(exc=exc, countdown=max(5, int(settings.VIDEO_UPSCALE_RETRY_BACKOFF_SECONDS or 60)))
+
+
+    @celery_app.task(name="video_upscale.poll_remote", bind=True, max_retries=2)
+    def poll_remote(self, upscale_task_id: str) -> None:
+        try:
+            return run_async(_run_poll(upscale_task_id))
+        except Exception as exc:
+            raise self.retry(exc=exc, countdown=max(5, int(settings.VIDEO_UPSCALE_RETRY_BACKOFF_SECONDS or 60)))
+
+
+    @celery_app.task(name="video_upscale.download_remote_result", bind=True, max_retries=2)
+    def download_remote_result(self, upscale_task_id: str) -> None:
+        try:
+            return run_async(_run_download(upscale_task_id))
+        except Exception as exc:
+            raise self.retry(exc=exc, countdown=max(5, int(settings.VIDEO_UPSCALE_RETRY_BACKOFF_SECONDS or 60)))
+
+
+    @celery_app.task(name="video_upscale.finalize", bind=True, max_retries=2)
+    def finalize(self, upscale_task_id: str) -> None:
+        try:
+            return run_async(_run_finalize(upscale_task_id))
+        except Exception as exc:
+            raise self.retry(exc=exc, countdown=max(5, int(settings.VIDEO_UPSCALE_RETRY_BACKOFF_SECONDS or 60)))
+
+
+    @celery_app.task(name="video_upscale.recover_once", bind=True)
+    def recover_once(self) -> dict[str, Any]:
+        return run_async(_run_recovery())
+
+else:
+
+    class _DisabledTask:
+        def delay(self, *args: Any, **kwargs: Any) -> None:
+            raise RuntimeError("Celery is disabled")
+
+        def apply_async(self, *args: Any, **kwargs: Any) -> None:
+            raise RuntimeError("Celery is disabled")
+
+    execute_local = _DisabledTask()
+    submit_remote = _DisabledTask()
+    poll_remote = _DisabledTask()
+    download_remote_result = _DisabledTask()
+    finalize = _DisabledTask()
+    recover_once = _DisabledTask()
diff --git a/video-gen-api/app/types/generation/provider.py b/video-gen-api/app/types/generation/provider.py
index 75e037f7..f09bb696 100644
--- a/video-gen-api/app/types/generation/provider.py
+++ b/video-gen-api/app/types/generation/provider.py
@@ -14,6 +14,7 @@ class ProviderGenerationRecordLike(Protocol):
     duration: int | None
     aspect_ratio: str | None
     resolution: str | None
+    provider_generation_resolution: str | None
     image_size: str | None
     image_proportion: str | None
     image_px: str | None