39 lines
1.6 KiB
Markdown
39 lines
1.6 KiB
Markdown
---
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title: "Transcript-Based Summarization"
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type: concept
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tags: [Transcript, Summarization, YouTube, Content-Processing, AI]
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sources: [daily-youtube-digest]
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last_updated: 2026-04-22
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---
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## Definition
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Transcript-Based Summarization 是指从视频/音频内容中提取字幕/ transcript，然后通过 AI 压缩为结构化要点摘要的处理流程。它使长视频/播客的消费从"没时间看完"变为"5 分钟掌握精华"。
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## Workflow
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1. **Transcript Extraction**: 通过 API（[[TranscriptAPI.com]]）或 CLI 工具（yt-dlp）获取字幕
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2. **AI Summarization**: LLM 处理字幕文本，输出关键点、亮点引用、时间戳
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3. **Structured Output**: 生成 bullet points、key quotes、timestamps 等结构化格式
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4. **Delivery**: 整合到 [[Daily-Digest]] 或 [[second-brain]]
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## TranscriptAPI vs yt-dlp
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| Criteria | yt-dlp | TranscriptAPI.com |
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|---|---|---|
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| Output format | Verbose CLI logs | Clean JSON |
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| Cloud compatibility | Fails on GCP/cloud | ✅ Works everywhere |
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| Caching | None | ✅ Cached results |
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| Rate limiting | Random blocks | ✅ Reliable, millions served |
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| Dependencies | Binary required | HTTP API only |
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## Applications
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- [[Daily YouTube Digest]]: 频道新视频 → 字幕提取 → 要点摘要 → 推送
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- [[Podcast Production Pipeline]]: 播客音频 → 字幕 → 时间戳笔记 → 社交媒体片段
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- [[youtube-content-pipeline]]: YouTube 视频 → 字幕 → 博客文章/Newsletter
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## Connections
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- [[Transcript-Based Summarization]] ← uses ← [[TranscriptAPI.com]]
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- [[Daily-Digest]] ← incorporates ← [[Transcript-Based Summarization]]
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