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Improve --sub-langs (see desc)

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* Treat `--sub-langs` entries as regex
* `all` can be used to refer to all the subtitles
* the language code can be prefixed with `-` to exclude it
* Deprecates `--all-subs`
Closes #253
This commit is contained in:
pukkandan
2021-04-20 02:47:09 +05:30
parent 3097d9e512
commit c32b0aab8a
4 changed files with 59 additions and 16 deletions
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35
yt_dlp/YoutubeDL.py
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@@ -244,11 +244,15 @@ class YoutubeDL(object):
writedesktoplink: Write a Linux internet shortcut file (.desktop)
writesubtitles: Write the video subtitles to a file
writeautomaticsub: Write the automatically generated subtitles to a file
allsubtitles: Downloads all the subtitles of the video
allsubtitles: Deprecated - Use subtitlelangs = ['all']
Downloads all the subtitles of the video
(requires writesubtitles or writeautomaticsub)
listsubtitles: Lists all available subtitles for the video
subtitlesformat: The format code for subtitles
subtitleslangs: List of languages of the subtitles to download
subtitleslangs: List of languages of the subtitles to download (can be regex).
The list may contain "all" to refer to all the available
subtitles. The language can be prefixed with a "-" to
exclude it from the requested languages. Eg: ['all', '-live_chat']
keepvideo: Keep the video file after post-processing
daterange: A DateRange object, download only if the upload_date is in the range.
skip_download: Skip the actual download of the video file
@@ -2038,15 +2042,28 @@ class YoutubeDL(object):
available_subs):
return None
all_sub_langs = available_subs.keys()
if self.params.get('allsubtitles', False):
requested_langs = available_subs.keys()
requested_langs = all_sub_langs
elif self.params.get('subtitleslangs', False):
requested_langs = set()
for lang in self.params.get('subtitleslangs'):
if lang == 'all':
requested_langs.update(all_sub_langs)
continue
discard = lang[0] == '-'
if discard:
lang = lang[1:]
current_langs = filter(re.compile(lang + '$').match, all_sub_langs)
if discard:
for lang in current_langs:
requested_langs.discard(lang)
else:
requested_langs.update(current_langs)
elif 'en' in available_subs:
requested_langs = ['en']
else:
if self.params.get('subtitleslangs', False):
requested_langs = self.params.get('subtitleslangs')
elif 'en' in available_subs:
requested_langs = ['en']
else:
requested_langs = [list(available_subs.keys())[0]]
requested_langs = [list(all_sub_langs)[0]]
formats_query = self.params.get('subtitlesformat', 'best')
formats_preference = formats_query.split('/') if formats_query else []