- closed_caption_e = find_xpath_attr(smil, self._xpath_ns('.//param', namespace), 'name', 'ClosedCaptionURL')
- return {
- 'en': [{
- 'ext': 'ttml',
- 'url': closed_caption_e.attrib['value'],
- }]
- } if closed_caption_e is not None and closed_caption_e.attrib.get('value') else []
+ subtitles = {}
+ for k, ext in [('sMPTE-TTCCURL', 'tt'), ('ClosedCaptionURL', 'ttml'), ('webVTTCaptionURL', 'vtt')]:
+ cc_e = find_xpath_attr(smil, self._xpath_ns('.//param', namespace), 'name', k)
+ if cc_e is not None:
+ cc_url = cc_e.get('value')
+ if cc_url:
+ subtitles.setdefault(subtitles_lang, []).append({
+ 'ext': ext,
+ 'url': cc_url,
+ })
+ return subtitles