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.


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