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feat(generate): #1744 批量预览对接后端变体真实片段 + 智能匹配候选池×3 #1748

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auto-approve-bot merged 1 commits from feat/1744-batch-real-variant-clips into develop 2026-09-06 20:45:10 +08:00
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xiaoxia commented 2026-09-06 20:20:43 +08:00
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背景 / 工单 #1744

批量预览 N 个视频时，变体差异仅靠前端 variantSeed 本地模拟（素材轮换+随机起点），不调后端；后端正式渲染走独立 plan（#1745 已上线 reselect_plan_for_variant），导致预览与成片不一致。

改动

1. 批量预览对接真实变体片段（方案 A：轻量选片端点，零渲染成本）

  • 新增 api/generation/variantPlans.ts：POST /generation/variant-plans，请求 {template_id, asset_ids, count, source_edit_plan_id?}，响应 {items: [{variant_index, plan_id, clips}], total}。只选片不渲染视频，复用后端已有的 reselect_plan_for_variant 同源逻辑
  • 新增 hooks/useBatchVariantPlans.ts：批量模式 step4 素材就绪后拉取 N 个变体的真实 plan clips
  • CanvasPreviewGrid 每个变体卡片优先播放 serverClips（播放器本就支持，serverClips 非空时优先、为空回退 variantSeed），加载中显示「独立选片中…」角标
  • useGenerateVideo 正式生成时按勾选索引回传 variant_plan_ids，后端直接关联对应 plan、不再重选，保证预览所见即成片

2. 三级降级（后端端点未上线不阻塞）

  • 404（端点未上线）：静默降级本地 variantSeed 模拟，用户无感
  • 400（素材不足）：静默（全局 axios 拦截器已 toast 后端 detail，正式生成时后端同样拦截）
  • 网络/超时/5xx：toast 一次「预览素材排布加载失败，正式生成时每个视频仍会独立随机选片」
  • hook 仅 isBatch && currentStep===4 && 素材就绪 启用；N=1 单视频零回归

3. 智能匹配候选池扩大（工单附带项）

  • computeLimitFromSegments 规则改为 max(片段数×3, ceil(总时长/15s), 片段数)，钳制 [1,200]；DEFAULT_LIMIT 10→30
  • 保证批量变体独立选片 + 跨变体 20% 区间避让有足够候选素材

4. 测试

  • 新增 15 例单测：候选池规则 6 例 + hook（降级/竞态/指纹去重/reset bailout）9 例
  • 修复过程中发现并修复一个真实 bug：hook reset 分支无条件 setState 新数组引用，内联字面量 props 下会触发无限渲染循环（测试中表现为 worker OOM），改为函数式更新 bailout

后端依赖（不阻塞本 PR 合并，前端已降级）

  1. 需实现 POST /api/v1/generation/variant-plans：变体 0 返回源/草稿 plan clips，变体 1..N-1 调 EditPlanService.reselect_plan_for_variant（与正式生成同源），只选片不渲染；clips 需支持按任意 plan_id 查询（现有 GET clips 端点经 get_draft_plan_id 只能拿草稿 plan）
  2. CreateGenerationTaskRequest 增加 variant_plan_ids: list[str]（Pydantic v2 默认 extra=ignore，前端提前传不会 422），创建批量任务时直接关联对应 plan

验证

  • tsc 净 / eslint 0 warning / prettier 干净 / npm run build 通过
  • vitest 全量 33 文件 329 例全过（含新增 15 例）
## 背景 / 工单 #1744 批量预览 N 个视频时，变体差异仅靠前端 `variantSeed` 本地模拟（素材轮换+随机起点），不调后端；后端正式渲染走独立 plan（#1745 已上线 `reselect_plan_for_variant`），导致**预览与成片不一致**。 ## 改动 ### 1. 批量预览对接真实变体片段（方案 A：轻量选片端点，零渲染成本） - 新增 `api/generation/variantPlans.ts`：`POST /generation/variant-plans`，请求 `{template_id, asset_ids, count, source_edit_plan_id?}`，响应 `{items: [{variant_index, plan_id, clips}], total}`。**只选片不渲染视频**，复用后端已有的 `reselect_plan_for_variant` 同源逻辑 - 新增 `hooks/useBatchVariantPlans.ts`：批量模式 step4 素材就绪后拉取 N 个变体的真实 plan clips - `CanvasPreviewGrid` 每个变体卡片优先播放 `serverClips`（播放器本就支持，serverClips 非空时优先、为空回退 variantSeed），加载中显示「独立选片中…」角标 - `useGenerateVideo` 正式生成时按勾选索引回传 `variant_plan_ids`，后端直接关联对应 plan、不再重选，保证**预览所见即成片** ### 2. 三级降级（后端端点未上线不阻塞） - 404（端点未上线）：静默降级本地 variantSeed 模拟，用户无感 - 400（素材不足）：静默（全局 axios 拦截器已 toast 后端 detail，正式生成时后端同样拦截） - 网络/超时/5xx：toast 一次「预览素材排布加载失败，正式生成时每个视频仍会独立随机选片」 - hook 仅 `isBatch && currentStep===4 && 素材就绪` 启用；**N=1 单视频零回归** ### 3. 智能匹配候选池扩大（工单附带项） - `computeLimitFromSegments` 规则改为 `max(片段数×3, ceil(总时长/15s), 片段数)`，钳制 [1,200]；DEFAULT_LIMIT 10→30 - 保证批量变体独立选片 + 跨变体 20% 区间避让有足够候选素材 ### 4. 测试 - 新增 15 例单测：候选池规则 6 例 + hook（降级/竞态/指纹去重/reset bailout）9 例 - 修复过程中发现并修复一个真实 bug：hook reset 分支无条件 setState 新数组引用，内联字面量 props 下会触发无限渲染循环（测试中表现为 worker OOM），改为函数式更新 bailout ## 后端依赖（不阻塞本 PR 合并，前端已降级） 1. 需实现 `POST /api/v1/generation/variant-plans`：变体 0 返回源/草稿 plan clips，变体 1..N-1 调 `EditPlanService.reselect_plan_for_variant`（与正式生成同源），只选片不渲染；clips 需支持按任意 plan_id 查询（现有 GET clips 端点经 `get_draft_plan_id` 只能拿草稿 plan） 2. `CreateGenerationTaskRequest` 增加 `variant_plan_ids: list[str]`（Pydantic v2 默认 extra=ignore，前端提前传不会 422），创建批量任务时直接关联对应 plan ## 验证 - tsc 净 / eslint 0 warning / prettier 干净 / `npm run build` 通过 - vitest 全量 33 文件 329 例全过（含新增 15 例）
xiaoxia added 1 commit 2026-09-06 20:20:44 +08:00
feat(generate): #1744 批量预览对接后端变体真实片段 + 智能匹配候选池扩大×3
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4eb3b49520 
- 新增 POST /generation/variant-plans 轻量选片端点客户端与 useBatchVariantPlans hook：
  批量 step4 素材就绪后拉取各变体真实 plan clips，Canvas 预览优先播放 serverClips，
  预览所见即成片；端点 404/400 静默降级本地 variantSeed 模拟，网络错误 toast 一次
- 正式生成批量提交时按勾选索引回传 variant_plan_ids，后端直接关联不重选
- useSmartMatch 候选池下限改为 max(片段数×3, ceil(总时长/15s), 片段数)，
  DEFAULT_LIMIT 10→30，保证批量变体独立选片避让有足够素材
- N=1 单视频链路零回归（hook 仅 isBatch && step4 启用）
- 新增单测 15 例（候选池规则 6 + hook 降级/竞态/去重/bailout 9）
auto-approve-bot approved these changes 2026-09-06 20:24:02 +08:00
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CI全绿，自动审批通过。

CI全绿，自动审批通过。
auto-approve-bot approved these changes 2026-09-06 20:24:02 +08:00
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CI全绿，自动审批通过。

CI全绿，自动审批通过。
gitea-actions bot commented 2026-09-06 20:24:38 +08:00
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🚀 预览环境已部署

项目 详情
PR号 #1748
预览链接 https://pr-1748.preview.xiaoxiajianji.com
API环境 staging

💡 预览环境使用 staging API 数据，请勿在预览环境中操作重要数据。

🔄 每次提交新代码后预览环境会自动更新。

🗑️ PR 关闭或合并后，预览环境会自动清理。

🚀 **预览环境已部署** | 项目 | 详情 | |------|------| | PR号 | #1748 | | 预览链接 | [https://pr-1748.preview.xiaoxiajianji.com](https://pr-1748.preview.xiaoxiajianji.com) | | API环境 | staging | > 💡 预览环境使用 staging API 数据，请勿在预览环境中操作重要数据。 > > 🔄 每次提交新代码后预览环境会自动更新。 > > 🗑️ PR 关闭或合并后，预览环境会自动清理。
auto-approve-bot commented 2026-09-06 20:31:05 +08:00
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代码审查结果 - PR #1748

⚠️ 问题（0个需要修改）

无

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✅ 格式检查通过 | ✅ 逻辑审查通过 | ✅ 性能良好

🤖 由 AI 代码审查机器人自动生成 | 2026-09-06 12:31:05 | 模型:

## 代码审查结果 - PR #1748 ### ⚠️ 问题（0个需要修改） 无 ### 💡 建议（0个可选） 无 --- ✅ 格式检查通过 | ✅ 逻辑审查通过 | ✅ 性能良好 --- <sub>🤖 由 AI 代码审查机器人自动生成 | 2026-09-06 12:31:05 | 模型: </sub> <!-- AI_CODE_REVIEW_AUTO_COMMENT -->
auto-approve-bot merged commit bcbcb41750 into develop 2026-09-06 20:45:10 +08:00
auto-approve-bot deleted branch feat/1744-batch-real-variant-clips 2026-09-06 20:45:11 +08:00
gitea-actions bot commented 2026-09-06 20:46:15 +08:00
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🗑️ 预览环境已清理

PR #1748 已关闭或合并，对应的预览环境已被清理。

如有需要，可以重新打开 PR 来重新生成预览环境。

🗑️ **预览环境已清理** PR #1748 已关闭或合并，对应的预览环境已被清理。 > 如有需要，可以重新打开 PR 来重新生成预览环境。
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Reference: xiaoxia/xiaoxia-saas#1748
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