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video2slides: 加 PDF 导出（服务端流式）+ 点击切换帧 保留/弃用

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- 点击卡片切换 use/discard，手动覆盖阈值判定；手动标记角标 + 重置按钮
- 导出 PDF：后台 job，逐张把帧 JPEG 以 DCTDecode 直接嵌入、边读边写到磁盘，
  内存峰值只一张帧，防大视频 OOM；前端轮询进度条
- 下载走流式（ReaderStream），不把整份 PDF 读进内存；?c= query 触发下载
- 手撸极简 PDF writer（无新 PDF 依赖），只扫 JPEG 头取宽高分量数
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fam
2026-06-14 21:58:27 +01:00
parent 25a28ea092
commit b36e30ecbf
6 changed files with 415 additions and 16 deletions
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Cargo.lock
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@@ -1952,6 +1952,7 @@ dependencies = [
"serde",
"serde_json",
"tokio",
"tokio-util",
"tracing",
"uuid",
]