ext = textstream.get('ext') or determine_ext(src)
if not ext:
type_ = textstream.get('type')
- if type_ == 'text/srt':
- ext = 'srt'
- lang = textstream.get('systemLanguage') or textstream.get('systemLanguageName') or subtitles_lang
+ SUBTITLES_TYPES = {
+ 'text/vtt': 'vtt',
+ 'text/srt': 'srt',
+ 'application/smptett+xml': 'tt',
+ }
+ if type_ in SUBTITLES_TYPES:
+ ext = SUBTITLES_TYPES[type_]
+ lang = textstream.get('systemLanguage') or textstream.get('systemLanguageName') or textstream.get('lang') or subtitles_lang
subtitles.setdefault(lang, []).append({
'url': src,
'ext': ext,
def _get_subtitles(self, *args, **kwargs):
raise NotImplementedError("This method must be implemented by subclasses")
+ @staticmethod
+ def _merge_subtitle_items(subtitle_list1, subtitle_list2):
+ """ Merge subtitle items for one language. Items with duplicated URLs
+ will be dropped. """
+ list1_urls = set([item['url'] for item in subtitle_list1])
+ ret = list(subtitle_list1)
+ ret.extend([item for item in subtitle_list2 if item['url'] not in list1_urls])
+ return ret
+
+ @classmethod
+ def _merge_subtitles(kls, subtitle_dict1, subtitle_dict2):
+ """ Merge two subtitle dictionaries, language by language. """
+ ret = dict(subtitle_dict1)
+ for lang in subtitle_dict2:
+ ret[lang] = kls._merge_subtitle_items(subtitle_dict1.get(lang, []), subtitle_dict2[lang])
+ return ret
+
def extract_automatic_captions(self, *args, **kwargs):
if (self._downloader.params.get('writeautomaticsub', False) or
self._downloader.params.get('listsubtitles')):