[FFmpeg-user] adding -ss and -t loses the audio stream on the output

Clément Bœsch ubitux at gmail.com
Wed Feb 1 13:35:37 CET 2012

On Wed, Feb 01, 2012 at 12:31:36PM +0000, Tim Nicholson wrote:
> On 24/01/2012 20:05, Carl Eugen Hoyos wrote:
> >Tim Nicholson<tim.nicholson<at>  bbc.co.uk>  writes:
> >
> >>So I have a command line to make two versions of a file that works
> >>perfectly until I add in "-ss time -t duration". Then although
> >>everything seems to work as normal, and the created files are the right
> >>duration they lack the audio stream
> >
> >Is this also reproducible with a shorter command line (without filters)?
> >Are external libraries (x264, faac) necessary to reproduce the problem?
> >
> I get the same result when changing the ouput to dvvideo/pcm16 and
> with only the lavi filter for doing the audio mapping.
> If I remove the lavi filter I get the audio so it seems to be that
> which is causing the problem.

I have some pending patches to fix this issue in some filters. I'll push
them in a day or two.


Clément B.
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