+ def _extract_storyboard(self, player_responses, duration):
+ spec = get_first(
+ player_responses, ('storyboards', 'playerStoryboardSpecRenderer', 'spec'), default='').split('|')[::-1]
+ if not spec:
+ return
+ base_url = spec.pop()
+ L = len(spec) - 1
+ for i, args in enumerate(spec):
+ args = args.split('#')
+ counts = list(map(int_or_none, args[:5]))
+ if len(args) != 8 or not all(counts):
+ self.report_warning(f'Malformed storyboard {i}: {"#".join(args)}{bug_reports_message()}')
+ continue
+ width, height, frame_count, cols, rows = counts
+ N, sigh = args[6:]
+
+ url = base_url.replace('$L', str(L - i)).replace('$N', N) + f'&sigh={sigh}'
+ fragment_count = frame_count / (cols * rows)
+ fragment_duration = duration / fragment_count
+ yield {
+ 'format_id': f'sb{i}',
+ 'format_note': 'storyboard',
+ 'ext': 'mhtml',
+ 'protocol': 'mhtml',
+ 'acodec': 'none',
+ 'vcodec': 'none',
+ 'url': url,
+ 'width': width,
+ 'height': height,
+ 'fragments': [{
+ 'path': url.replace('$M', str(j)),
+ 'duration': min(fragment_duration, duration - (j * fragment_duration)),
+ } for j in range(math.ceil(fragment_count))],
+ }
+