- if initialization_url:
- if not append_url_to_file(initialization_url, ctx['tmpfilename'], 'Init'):
- return False
- for i, segment_url in enumerate(segment_urls):
- if not append_url_to_file(segment_url, ctx['tmpfilename'], 'Seg%d' % i):
+ segments_to_download = [(initialization_url, 'Init')] if initialization_url else []
+ segments_to_download.extend([
+ (segment_url, 'Seg%d' % i)
+ for i, segment_url in enumerate(segment_urls)])
+
+ for i, segment in enumerate(segments_to_download):
+ # In DASH, the first segment contains necessary headers to
+ # generate a valid MP4 file, so always abort for the first segment
+ fatal = i == 0 or not skip_unavailable_fragments
+ if not process_segment(segment, ctx['tmpfilename'], fatal):