Static ffmpeg and editing audio files (Ubuntu)

[dinkypumpkin]

On 29/11/2011 14:39, richard_get_iplayer wrote:
> ffmpeg -i Ed_Reardons_Week.m4a -ss 00:02:34 -t 00:27:46 -acodec copy
> output.m4a
>
> This gives a start times after 2min 34 secs and a duration of 27 min 46
> secs; but the edited m4a file came out 25 min 11 secs long.

Are you sure you're using ffmpeg from the PPA?  The command "ffmpeg" 
will invoke the system-supplied ffmpeg, while "ffmpeg-static" invokes 
the PPA build.  If that's the case, what version of system-supplied 
ffmpeg do you have?  I tried your example on Ubuntu 11.10 with both 
system-supplied ffmpeg (0.7.2) and PPA ffmpeg, and both worked as they 
should.