[Ffmpeg-devel] mpeg2 muxer: lpcm issue

Måns Rullgård mru
Sat Jul 22 11:35:31 CEST 2006

Chris said:
> Hi,
> I have found a strange issue with the mpeg muxer.
> I have an mpeg 2 program stream which contains a LPCM audio track (stream id
> 0xa0). All I want to do is to remux it. When I choose any of the formats so
> that s->is_mpeg2 (in mpeg.c) is true (i.e svcd, dvd or vob) the resultant
> mpeg plays its audio as white noise in WMP and any media player that I have
> tried. When I just use the mpg format (i.e s->is_mpeg2 is false) the audio
> plays fine but clearly it is muxed as an mpeg 1 program stream.
> This is happening on all my mpegs with LPCM audio tracks. An example of one
> is at: ftp://ftp.mplayerhq.hu/MPlayer/incoming/mpeg2_mux_lpcm_issue
> Additional points:
> - The source mpeg plays fine.
> - I have demuxed the input & output streams and done a binary compare - they
> are identical. This suggests that the headers in the PS are maybe causing
> the issue.

I'll have a look as soon as I  have access to something with a little
more power than a Nokia 770.

M?ns Rullg?rd
mru at inprovide.com

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