[Ffmpeg-devel] Transcode video

Julian Scheid julian
Mon Jan 30 19:20:42 CET 2006

Hi Stefan,

I also encountered a problem with 3gp transcoding and posted a patch to 
this mailing list, but never got an answer. I guess it didn't make it to 

I'm not sure if it helps in your case, but at least for me transcoding 
various 3gp files seems to work fine now (using ffmpeg CVS as of Dec 
10th with patch applied).

Patch is here:

Good luck,


Stefan Baltus wrote:
> $ ./ffmpeg -i test.3gp -f avi -acodec pcm_alaw test.avi
> That works. But the problem is, when played back, the video is twice
> the speed. Audio is OK. Seems like the 15fps is somehow translated to 30fps.

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