(continuing comment #7, workarounds)
Alternatively remux with ffmpeg, with about the same result.
ffmpeg -i infile.flv -vcodec copy -acodec copy outfile.flv
(continuing comment #7, workarounds)
Alternatively remux with ffmpeg, with about the same result.
ffmpeg -i infile.flv -vcodec copy -acodec copy outfile.flv