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

Clément Bœsch ubitux at gmail.com
Thu Feb 2 14:57:12 CET 2012

On Wed, Feb 01, 2012 at 03:17:34PM +0000, Tim Nicholson wrote:
> On 01/02/2012 12:35, Clément Bœsch wrote:
> >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.
> Thanks Clément, I saw you proposals after making my original post
> here and wondered if they might be related.

The patches are now upstream; feel free to raise any regressions or
remaining bugs (maybe some other filters are affected).

Clément B.
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