Distorted sound after converting to mpg

[dinkypumpkin]

On 03/03/2012 10:04, Colin Law wrote:
> For the record this appears to be an issue with the version of
> ffmpeg/avconv currently provided with Ubuntu 12.04 alpha.  A
> workaround is to use
> ffmpeg -i file.mp4 -target pal-dvd -acodec ac3_fixed out.mpg
> It is the acodec that is significant, forcing it to use ac3_fixed
> rather than just ac3

FWIW, I found this same problem in Ubuntu 11.10, which does use an 
earlier version of FFmpeg.  At the time, I just figured something had 
gone wrong in the Libav fork that Ubuntu adopted for FFmpeg.  I didn't 
investigate further, but I noted at the time that the Fedora 15, Fedora 
16, and Ubuntu PPA versions. all of which derive from the original 
FFmpeg lineage, worked fine.  Even though Ubuntu switched to Libav in 
11.04, the code base hadn't really diverged for the release they used, 
so the 11.04 version of FFmpeg still worked OK.  Hopefully, something 
will come of your bug report.