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[subtitles] Simplify the extraction of subtitles in subclasses and remove NoAutoSubtitlesInfoExtractor

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Subclasses just need to call the method extract_subtitles, which will call _extract_subtitles and _request_automatic_caption
Now the default implementation of _request_automatic_caption returns {}.
This commit is contained in:
Jaime Marquínez Ferrándiz
2013-09-11 16:05:49 +02:00
parent 54d39d8b2f
commit d82134c339
3 changed files with 27 additions and 27 deletions
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34
youtube_dl/extractor/subtitles.py
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@@ -62,19 +62,31 @@ class SubtitlesInfoExtractor(InfoExtractor):
return sub
def _get_available_subtitles(self, video_id):
""" returns {sub_lang: url} or {} if not available """
""" Must be redefined by the subclasses """
"""
returns {sub_lang: url} or {} if not available
Must be redefined by the subclasses
"""
pass
def _request_automatic_caption(self, video_id, webpage):
""" returns {sub_lang: sub} or {} if not available """
""" Must be redefined by the subclasses """
pass
class NoAutoSubtitlesInfoExtractor(SubtitlesInfoExtractor):
""" A subtitle class for the servers that don't support auto-captions"""
def _request_automatic_caption(self, video_id, webpage):
"""
returns {sub_lang: sub} or {} if not available
Must be redefined by the subclasses that support automatic captions,
otherwise it will return {}
"""
self._downloader.report_warning(u'Automatic Captions not supported by this server')
return {}
def extract_subtitles(self, video_id, video_webpage=None):
"""
Extract the subtitles and/or the automatic captions if requested.
Returns None or a dictionary in the format {sub_lang: sub}
"""
video_subtitles = None
if self._downloader.params.get('writesubtitles', False) or self._downloader.params.get('allsubtitles', False):
video_subtitles = self._extract_subtitles(video_id)
elif self._downloader.params.get('writeautomaticsub', False):
video_subtitles = self._request_automatic_caption(video_id, video_webpage)
return video_subtitles