yt-dlp

https://github.com/yt-dlp/yt-dlp

安装

推荐用 python 3.10 和 3.11.

pip install yt-dlp

更新时，重新运行这个命令即可。

使用

下载字幕

以 https://www.youtube.com/watch?v=uwXrtyXXuy8 视频为例，先 list-subs ：

yt-dlp --no-check-certificate --list-subs "https://www.youtube.com/watch?v=uwXrtyXXuy8"

输出为：

[youtube] Extracting URL: https://www.youtube.com/watch?v=uwXrtyXXuy8
[youtube] uwXrtyXXuy8: Downloading webpage
[youtube] uwXrtyXXuy8: Downloading tv client config
[youtube] uwXrtyXXuy8: Downloading player c816c7d8-main
[youtube] uwXrtyXXuy8: Downloading tv player API JSON
[youtube] uwXrtyXXuy8: Downloading ios player API JSON

[youtube] uwXrtyXXuy8: Downloading m3u8 information
[info] Available automatic captions for uwXrtyXXuy8:
......


[info] Available subtitles for uwXrtyXXuy8:
Language       Name              Formats
en-eEY6OEpapPo English - English vtt, ttml, srv3, srv2, srv1, json3

看最后的 Available subtitles，这里只有一个 en-eEY6OEpapPo。

下载这个字幕：

yt-dlp --no-check-certificate --write-sub --sub-lang en-eEY6OEpapPo --skip-download "https://www.youtube.com/watch?v=uwXrtyXXuy8"

yt-dlp –no-check-certificate –write-sub –sub-lang en-eEY6OEpapPo –skip-download “https://www.youtube.com/watch?v=uwXrtyXXuy8" [youtube] Extracting URL: https://www.youtube.com/watch?v=uwXrtyXXuy8 [youtube] uwXrtyXXuy8: Downloading webpage [youtube] uwXrtyXXuy8: Downloading tv client config [youtube] uwXrtyXXuy8: Downloading tv player API JSON [youtube] uwXrtyXXuy8: Downloading ios player API JSON [youtube] uwXrtyXXuy8: Downloading player c816c7d8-main WARNING: [youtube] Falling back to generic n function search player = https://www.youtube.com/s/player/c816c7d8/player_ias.vflset/en_US/base.js WARNING: [youtube] uwXrtyXXuy8: nsig extraction failed: Some formats may be missing n = 4E383aqRYuZFN_ ; player = https://www.youtube.com/s/player/c816c7d8/player_ias.vflset/en_US/base.js Please report this issue on https://github.com/yt-dlp/yt-dlp/issues?q= , filling out the appropriate issue template. Confirm you are on the latest version using yt-dlp -U WARNING: [youtube] uwXrtyXXuy8: nsig extraction failed: Some formats may be missing n = HZ0rKbfw6A9v67 ; player = https://www.youtube.com/s/player/c816c7d8/player_ias.vflset/en_US/base.js Please report this issue on https://github.com/yt-dlp/yt-dlp/issues?q= , filling out the appropriate issue template. Confirm you are on the latest version using yt-dlp -U WARNING: [youtube] uwXrtyXXuy8: nsig extraction failed: Some formats may be missing n = RVmdPzqu_4TS6H ; player = https://www.youtube.com/s/player/c816c7d8/player_ias.vflset/en_US/base.js Please report this issue on https://github.com/yt-dlp/yt-dlp/issues?q= , filling out the appropriate issue template. Confirm you are on the latest version using yt-dlp -U WARNING: [youtube] uwXrtyXXuy8: Some web client https formats have been skipped as they are missing a url. YouTube is forcing SABR streaming for this client. See https://github.com/yt-dlp/yt-dlp/issues/12482 for more details [youtube] uwXrtyXXuy8: Downloading m3u8 information [info] uwXrtyXXuy8: Downloading subtitles: en-eEY6OEpapPo [info] Testing format 614 [info] Testing format 234 [info] uwXrtyXXuy8: Downloading 1 format(s): 614+234 [info] Writing video subtitles to: AWS re：Invent 2025 - Building multi-tenant SaaS agents with Amazon Bedrock AgentCore (SAS407) [uwXrtyXXuy8].en-eEY6OEpapPo.vtt

ERROR: Did not get any data blocks