Download auto-generated translations

This is a feature request.

YouTube also offers auto (google) translated versions of the subtitles. I would like to be able to download those. Is there a reason why the auto-generated original language is listed when I run yt.captions.all(), but the auto-translated versions aren’t?

Is it possible to also get those from the API? If so I’d be happy to make a PR with the necessary changes.

[Tiriar]

Note that the caption URL also has a parameter asr_langs, which includes a list of languages that the caption can be translated to.

For the time being, I am using this code as a workaround to get translation from any captions that support it:

from urllib.parse import parse_qs, urlparse

from pytube import YouTube
from pytube.captions import Caption

def get_srt(url, lang='en'):
    video = YouTube(url)
    captions = video.captions.get(lang)

    if not captions:
        for c in video.captions:
            params = parse_qs(urlparse(c.url).query)
            asr_lang = params.get('asr_langs')
            if asr_lang and lang in asr_lang[0].split(','):
                captions = Caption({
                    'baseUrl': f'{c.url}&tlang={lang}',
                    'languageCode': lang,
                    'name': {'simpleText': 'ASR'}
                })
                break

    if not captions:
        raise KeyError

    return captions.generate_srt_captions()

[github-actions[bot]]

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