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from __future__ import unicode_literals |
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from .common import InfoExtractor |
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from ..compat import compat_str |
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from ..utils import ( |
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ExtractorError, |
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) |
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class SubtitlesInfoExtractor(InfoExtractor): |
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@property |
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def _have_to_download_any_subtitles(self): |
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return any([self._downloader.params.get('writesubtitles', False), |
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self._downloader.params.get('writeautomaticsub')]) |
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def _list_available_subtitles(self, video_id, webpage): |
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""" outputs the available subtitles for the video """ |
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sub_lang_list = self._get_available_subtitles(video_id, webpage) |
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auto_captions_list = self._get_available_automatic_caption(video_id, webpage) |
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sub_lang = ",".join(list(sub_lang_list.keys())) |
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self.to_screen('%s: Available subtitles for video: %s' % |
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(video_id, sub_lang)) |
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auto_lang = ",".join(auto_captions_list.keys()) |
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self.to_screen('%s: Available automatic captions for video: %s' % |
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(video_id, auto_lang)) |
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def extract_subtitles(self, video_id, webpage): |
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""" |
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returns {sub_lang: sub} ,{} if subtitles not found or None if the |
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subtitles aren't requested. |
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""" |
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if not self._have_to_download_any_subtitles: |
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return None |
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available_subs_list = {} |
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if self._downloader.params.get('writeautomaticsub', False): |
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available_subs_list.update(self._get_available_automatic_caption(video_id, webpage)) |
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if self._downloader.params.get('writesubtitles', False): |
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available_subs_list.update(self._get_available_subtitles(video_id, webpage)) |
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if not available_subs_list: # error, it didn't get the available subtitles |
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return {} |
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if self._downloader.params.get('allsubtitles', False): |
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sub_lang_list = available_subs_list |
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else: |
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if self._downloader.params.get('subtitleslangs', False): |
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requested_langs = self._downloader.params.get('subtitleslangs') |
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elif 'en' in available_subs_list: |
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requested_langs = ['en'] |
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else: |
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requested_langs = [list(available_subs_list.keys())[0]] |
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sub_lang_list = {} |
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for sub_lang in requested_langs: |
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if sub_lang not in available_subs_list: |
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self._downloader.report_warning('no closed captions found in the specified language "%s"' % sub_lang) |
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continue |
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sub_lang_list[sub_lang] = available_subs_list[sub_lang] |
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subtitles = {} |
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for sub_lang, url in sub_lang_list.items(): |
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subtitle = self._request_subtitle_url(sub_lang, url) |
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if subtitle: |
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subtitles[sub_lang] = subtitle |
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return subtitles |
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def _download_subtitle_url(self, sub_lang, url): |
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return self._download_webpage(url, None, note=False) |
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def _request_subtitle_url(self, sub_lang, url): |
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""" makes the http request for the subtitle """ |
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try: |
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sub = self._download_subtitle_url(sub_lang, url) |
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except ExtractorError as err: |
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self._downloader.report_warning('unable to download video subtitles for %s: %s' % (sub_lang, compat_str(err))) |
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return |
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if not sub: |
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self._downloader.report_warning('Did not fetch video subtitles') |
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return |
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return sub |
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def _get_available_subtitles(self, video_id, webpage): |
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""" |
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returns {sub_lang: url} or {} if not available |
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Must be redefined by the subclasses |
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""" |
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# By default, allow implementations to simply pass in the result |
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assert isinstance(webpage, dict), \ |
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'_get_available_subtitles not implemented' |
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return webpage |
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def _get_available_automatic_caption(self, video_id, webpage): |
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""" |
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returns {sub_lang: url} or {} if not available |
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Must be redefined by the subclasses that support automatic captions, |
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otherwise it will return {} |
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""" |
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self._downloader.report_warning('Automatic Captions not supported by this server') |
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return {} |