wip:

common/common/segments.py

@@ -327,6 +327,7 @@ def ffmpeg_cut_stdin(output_file, cut_start, duration, encode_args):
 	args = [
 		'ffmpeg',
 		'-hide_banner', '-loglevel', 'error', # suppress noisy output
+		'-copyts', '-start_at_zero',
 		'-i', '-',
 		'-ss', cut_start,
 		'-t', duration,