INNER CODE UNIT · Python

chat_with_video

liyupi/free-video-downloader · backend/api_summarize.py:128

async def chat_with_video(req: ChatRequest, user: dict | None = Depends(get_optional_user)) -> AsyncIterable[ServerSentEvent]:
    """AI 视频问答（SSE 流式）"""
    try:
        if not req.subtitle_text.strip():
            loop = asyncio.get_event_loop()
            extractor = _get_extractor()
            subtitle_data = await loop.run_in_executor(
                None, extractor.extract, req.url
            )
            if not subtitle_data["has_subtitle"]:
                yield ServerSentEvent(
                    raw_data=json.dumps({"message": "该视频没有可用的字幕，无法回答问题"}, ensure_ascii=False),
                    event="error",
                )
                return
            subtitle_text = subtitle_data["full_text"]
        else:
            subtitle_text = req.subtitle_text

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