+
+ if not formats:
+ formats = [pg_format(*pg_tuple) for pg_tuple in PG_FORMATS]
+ else:
+ pg_formats = []
+ for format_id, width, height in PG_FORMATS:
+ try:
+ # Find hls format with the same width and height corresponding
+ # to progressive format and copy metadata from it.
+ f = next(f for f in formats if f.get('height') == height)
+ # hls formats may have invalid width
+ f['width'] = width
+ f_copy = f.copy()
+ f_copy.update(pg_format(format_id, width, height))
+ pg_formats.append(f_copy)
+ except StopIteration:
+ # Missing hls format does mean that no progressive format with
+ # such width and height exists either.
+ pass
+ formats.extend(pg_formats)