Bilibili AI Subtitle Downloader v2.0
Download AI-generated subtitles from Bilibili videos quickly.
What This Skill Does
This skill downloads AI-generated subtitles (自动生成的字幕) from Bilibili videos. These are subtitles automatically created by Bilibili's AI system, not manually uploaded by creators.
Key improvements from v1.x:
- ✅ Customizable language priority (e.g., prefer English over Chinese)
- ✅ Better filename format: Title_Author_Date_Duration_BVid.txt
- ✅ Three-part document structure (Info, Summary, Full Text)
- ✅ Improved UTF-8 filename handling
- ✅ Better WSL Chromium/Windows Edge Cookie support
Supported AI Languages
Bilibili uses ai- prefix for AI-generated subtitles:
| Code | Language | 语言 |
|---|---|---|
ai-zh |
Chinese | 中文 |
ai-en |
English | 英文 |
ai-ja |
Japanese | 日文 |
ai-es |
Spanish | 西班牙文 |
ai-ar |
Arabic | 阿拉伯文 |
ai-pt |
Portuguese | 葡萄牙文 |
ai-ko |
Korean | 韩文 |
ai-de |
German | 德文 |
ai-fr |
French | 法文 |
Usage
Basic Usage
./scripts/bilibili_ai_subtitle.sh "https://www.bilibili.com/video/BVxxxxx/"
Specify Language Priority
# Prefer English, fallback to Chinese
./scripts/bilibili_ai_subtitle.sh -l en,zh "BVxxxxx"
# Prefer Japanese
./scripts/bilibili_ai_subtitle.sh --lang ja "BVxxxxx"
# Multiple languages in order of preference
./scripts/bilibili_ai_subtitle.sh -l en,zh,ja,es "BVxxxxx"
Output
File name format: VideoTitle_Author_Date_Duration_BVid.txt
File structure:
第一部分：视频信息
├── 视频标题
├── B站链接
├── 作者
├── 发布时间
├── 视频时长
├── 原视频语言
└── 转录来源
第二部分：视频摘要
└── 自动生成的内容摘要
第三部分：完整原文
└── 完整字幕文本
Setup
Browser Cookie (Recommended)
For accessing member-only videos, log in to Bilibili in:
- WSL Chromium (preferred): chromium-browser &
- Windows Edge: Log in normally
The script will automatically detect and use available cookies.
Requirements
yt-dlpinstalled- Optional: Browser with Bilibili login (for member-only videos)
Notes
- AI subtitles are generated automatically by Bilibili's system
- Accuracy varies (typically 85-95% for clear speech)
- Not all videos have AI subtitles available
- Some videos may require membership to access AI subtitles
Comparison with bilibili-transcript
| Feature | bilibili-ai-subtitle | bilibili-transcript |
|---|---|---|
| Purpose | Download AI subtitles only | Full transcription workflow |
| Speed | ⚡ Fast (instant download) | Varies (subtitles → Whisper) |
| Subtitle sources | AI only | CC → AI → Whisper |
| Use case | Quick subtitle grab | Complete transcription |
| Dependencies | yt-dlp only | yt-dlp + optional Whisper |
Recommendation: Use bilibili-ai-subtitle for quick AI subtitle download, use bilibili-transcript when you need complete transcription (including voice transcription for videos without subtitles).
