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Facebook Closed Captions not included as subtitles #26613

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opened 2026-02-21 14:24:05 -05:00 by deekerman · 2 comments

deekerman commented

2026-02-21 14:24:05 -05:00

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Originally created by @Kumole on GitHub (Jul 31, 2023).

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I'm reporting a site feature request
I've verified that I'm running youtube-dl version 2021.12.17
I've searched the bugtracker for similar site feature requests including closed ones

Description

Facebook videos with closed captions do not show up as subtitles when using the commands ">youtube-dl --list-subs" or ">youtube-dl --write-sub".
Example video with closed captions for deaf people: https://fb.watch/m7ChEhVZPt/

Originally created by @Kumole on GitHub (Jul 31, 2023).  ## Checklist  - [x] I'm reporting a site feature request - [x] I've verified that I'm running youtube-dl version **2021.12.17** - [x] I've searched the bugtracker for similar site feature requests including closed ones ## Description  Facebook videos with closed captions do not show up as subtitles when using the commands ">youtube-dl --list-subs" or ">youtube-dl --write-sub". Example video with closed captions for deaf people: https://fb.watch/m7ChEhVZPt/

deekerman added the

site-update-request

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2026-02-21 14:24:05 -05:00

deekerman commented

2026-02-21 14:24:07 -05:00

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@dirkf commented on GitHub (Jul 31, 2023):

On the positive side, FB extraction is actually working. yt-dlp also fails to find the CC as subtitles.

Is FB serving actual text, or are there different versions of the video, one/some with burned-in subtitles?

@dirkf commented on GitHub (Jul 31, 2023): On the positive side, FB extraction is actually working. yt-dlp also fails to find the CC as subtitles. Is FB serving actual text, or are there different versions of the video, one/some with burned-in subtitles?

deekerman commented

2026-02-21 14:24:07 -05:00

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@dirkf commented on GitHub (Jul 31, 2023):

OK, I had a look.

There is a og:locale element in the page that supplies a default language. In the video JSON, there is a captions_url that one can associate with that language. There is also a video_available_captions_locales list with each element being one combination of language, subtitle_type, URL.

After a bit of tweaking, this happened:

$ python -m youtube_dl --list-sub 'https://fb.watch/m7ChEhVZPt/'
[generic] m7ChEhVZPt: Requesting header
[redirect] Following redirect to https://www.facebook.com/CCaptions/videos/410568766182023/
[facebook] 410568766182023: Downloading webpage
[download] Downloading playlist: 410568766182023
[facebook] playlist 410568766182023: Collected 1 video ids (downloading 1 of them)
[download] Downloading video 1 of 1
Available automatic captions for 410568766182023:
Language formats
en-US    srt
410568766182023 has no subtitles
[download] Finished downloading playlist: 410568766182023
$

The URL of those auto-generated subtitles was https://scontent.flhr10-2.fna.fbcdn.net/v/t39.2093-6/51501946_410570236181876_6099645393375592448_n.srt?_nc_cat=101&ccb=1-7&_nc_sid=8d539b&_nc_ohc=BqCVL4SVRo4AX9YiNpF&_nc_ht=scontent.flhr10-2.fna&oh=00_AfDlM7XF7AqsJ-i3cpY0FISX2xLjKgw9vMhMD8s9-ffE7A&oe=64CD04B6.

@dirkf commented on GitHub (Jul 31, 2023): OK, I had a look. There is a `og:locale` element in the page that supplies a default language. In the video JSON, there is a `captions_url` that one can associate with that language. There is also a `video_available_captions_locales` list with each element being one combination of language, subtitle_type, URL. After a bit of tweaking, this happened: ```console $ python -m youtube_dl --list-sub 'https://fb.watch/m7ChEhVZPt/' [generic] m7ChEhVZPt: Requesting header [redirect] Following redirect to https://www.facebook.com/CCaptions/videos/410568766182023/ [facebook] 410568766182023: Downloading webpage [download] Downloading playlist: 410568766182023 [facebook] playlist 410568766182023: Collected 1 video ids (downloading 1 of them) [download] Downloading video 1 of 1 Available automatic captions for 410568766182023: Language formats en-US srt 410568766182023 has no subtitles [download] Finished downloading playlist: 410568766182023 $ ``` The URL of those auto-generated subtitles was https://scontent.flhr10-2.fna.fbcdn.net/v/t39.2093-6/51501946_410570236181876_6099645393375592448_n.srt?_nc_cat=101&ccb=1-7&_nc_sid=8d539b&_nc_ohc=BqCVL4SVRo4AX9YiNpF&_nc_ht=scontent.flhr10-2.fna&oh=00_AfDlM7XF7AqsJ-i3cpY0FISX2xLjKgw9vMhMD8s9-ffE7A&oe=64CD04B6.

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starred/youtube-dl-ytdl-org#26613

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