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fix: generate_video 任务接入 Feature Flag 灰度引擎选择 #247

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xiaoxia merged 1 commits from fix/generation-task-feature-flag into develop 2026-07-13 13:23:00 +08:00
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xiaoxia commented 2026-07-13 13:09:01 +08:00
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问题

一键生成（generate_video）任务硬编码使用 UnifiedRenderService，完全没有接入 render_engine Feature Flag，导致灰度开关形同虚设，无法控制新旧引擎切换。这是灰度发布的 P0 阻断问题。

修复

  1. 新增 _resolve_render_engine(user_id) 函数，复用 RenderEngineResolver 灰度逻辑
  2. 新增 _render_with_legacy_engine() 函数，实现旧引擎等价渲染：
    • filter_complex + concat 模式
    • 保持原帧率（无 fps 归一化），与旧引擎行为一致
    • 音频 192k AAC，与旧引擎一致
    • 支持 one_take / pip / voice_over / voice_pip 全部模式
  3. 在 generate_video 任务入口处根据 Feature Flag 选择引擎
  4. 渲染日志新增 engine 字段，便于灰度观测

单测

8 个测试全部通过：

  • 5 个 Feature Flag 场景测试（全局开关/白名单/百分比/默认值）
  • 3 个 legacy 渲染集成测试（单clip/多clipconcat/b_roll模式）

验证

  • 语法检查通过
  • 8 个单测全绿
## 问题 一键生成（generate_video）任务硬编码使用 UnifiedRenderService，完全没有接入 render_engine Feature Flag，导致灰度开关形同虚设，无法控制新旧引擎切换。这是灰度发布的 P0 阻断问题。 ## 修复 1. 新增 `_resolve_render_engine(user_id)` 函数，复用 RenderEngineResolver 灰度逻辑 2. 新增 `_render_with_legacy_engine()` 函数，实现旧引擎等价渲染： - filter_complex + concat 模式 - 保持原帧率（无 fps 归一化），与旧引擎行为一致 - 音频 192k AAC，与旧引擎一致 - 支持 one_take / pip / voice_over / voice_pip 全部模式 3. 在 generate_video 任务入口处根据 Feature Flag 选择引擎 4. 渲染日志新增 engine 字段，便于灰度观测 ## 单测 8 个测试全部通过： - 5 个 Feature Flag 场景测试（全局开关/白名单/百分比/默认值） - 3 个 legacy 渲染集成测试（单clip/多clipconcat/b_roll模式） ## 验证 - 语法检查通过 - 8 个单测全绿
xiaoxia added 1 commit 2026-07-13 13:09:02 +08:00
fix: generate_video 任务接入 Feature Flag 灰度引擎选择
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1d06d2ddd2 
问题：一键生成（generate_video）任务硬编码使用 UnifiedRenderService，
完全没有接入 render_engine Feature Flag，导致灰度开关形同虚设，
无法控制新旧引擎切换。

修复：
1. 新增 _resolve_render_engine(user_id) 函数，复用 RenderEngineResolver
2. 新增 _render_with_legacy_engine() 函数，实现旧引擎等价渲染
   - 使用 filter_complex + concat 模式
   - 保持原帧率（无 fps 归一化），与旧引擎行为一致
   - 音频 192k AAC，与旧引擎一致
   - 支持 one_take / pip / voice_over / voice_pip 全部模式
3. 在 generate_video 任务入口处根据 Feature Flag 选择引擎
4. 渲染日志新增 engine 字段，便于灰度观测

单测：8 个测试覆盖 flag 各场景 + legacy 渲染验证
xiaoxia merged commit c2ebe9d254 into develop 2026-07-13 13:23:00 +08:00
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Reference: xiaoxia/xiaoxia-saas#247
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