[FFmpeg-devel] Switching from mp4 container to avi

Michael Niedermayer michaelni at gmx.at
Thu Sep 8 16:24:52 CEST 2011

On Thu, Sep 08, 2011 at 09:30:00AM +0200, Jean Delvare wrote:
> Hi all,
> I am facing a strange container change issue for which I am seeking for
> guidance.
> Background:
> I have a series of video files in mp4 container format (xvid + mp3).
> They play well on my Samsung YP-R1 PMP, but not on my (father in law's)
> Sony digital TV set. That TV set plays avi container files just fine,
> and so does my PMP, so I decided to convert my files from mp4 container
> to avi so that I can play them on both devices.
> In order to not lose quality in the process, and to make conversion as
> fast as possible, I avoided recoding using the following command line:
> ffmpeg -i input.mp4 -vcodec copy -acodec copy -vtag xvid copy.avi
> The problem is, my PMP will refuse to play the resulting file (although
> I can play it with any media player on Linux - mplayer, totem,
> ffplay...) Sadly, it doesn't tell me why.

try -bsf:v dump_extra

Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

You can kill me, but you cannot change the truth.
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