Feature innertube captions #240
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user234683
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Aug 22, 2025
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Sorry for the late review. Have a few comments
Add settings to get caption from get_transcript innertube api. Disabled by default.
Add bbpb (i.e. blackboxprotobuf) as requirements to encode protobuf for innertube caption.
Add innertube_caption submodule to enable fetching captions via innertube get_caption api. No support for translated captions for now.
Add support to get captions via innertube api.
Add test for vtt_body and retry using footer continuation.
Will use the built-in proto module.
Use built-in proto submodule instead of bbpb to generate innertube caption request params.
Avoid url-quoting twice of params.
Set use_innertube_for_captions to True to get captions working.
Use deep_get from yt_data_extract to access nested dict items to provide safe extraction of its value. Also rewrite vtt part construction to use f-string.
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Set text/vtt as mimetype for get_caption()
Fix missing newline at the end of vtt chunk running text.
Add a workaround to get non innertube captions working, i.e. when use_innertube_for_captions is disabled.
Return 302 redirect to /api/timedtext when accessing /watch/transcript/ endpoint.
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Add ability to obtain captions from
get_transcriptinnertube api instead of using captionbaseUrlofplayerresponse.The feature is behind new settings:
use_innertube_for_captions, which is set toFalseby default.The protobuf encoded
paramsforget_transcriptis crafted using blackboxprotobuf module due to its lightweight size and easy-to-use.Currently only manual and auto generated captions are supported. There is no support for translated captions, so request for translated captions will return the caption in its original language.
This will hopefully fix #239