+ m3u8_formats = list(filter(
+ lambda f: f.get('protocol') == 'm3u8' and f.get('vcodec') != 'none' and f.get('resolution') != 'multiple',
+ formats))
+ if http_url:
+ for m3u8_format in m3u8_formats:
+ bitrate = self._search_regex(r'(\d+)k', m3u8_format['url'], 'bitrate', default=None)
+ # Lower qualities (150k and 192k) are not available as HTTP formats (see [1]),
+ # we won't try extracting them.
+ # Since summer 2016 higher quality formats (4500k and 6500k) are also available
+ # albeit they are not documented in [2].
+ # 1. https://github.com/rg3/youtube-dl/commit/cbc032c8b70a038a69259378c92b4ba97b42d491#commitcomment-17313656
+ # 2. https://projects.pbs.org/confluence/display/coveapi/COVE+Video+Specifications
+ if not bitrate or int(bitrate) < 400:
+ continue
+ f_url = re.sub(r'\d+k|baseline', bitrate + 'k', http_url)
+ # This may produce invalid links sometimes (e.g.
+ # http://www.pbs.org/wgbh/frontline/film/suicide-plan)
+ if not self._is_valid_url(f_url, display_id, 'http-%sk video' % bitrate):
+ continue
+ f = m3u8_format.copy()
+ f.update({
+ 'url': f_url,
+ 'format_id': m3u8_format['format_id'].replace('hls', 'http'),
+ 'protocol': 'http',
+ })
+ formats.append(f)