[FFmpeg-user] mp4 concat demuxer problem

Nicolas George george at nsup.org
Sun May 4 11:58:21 CEST 2014

Le nonidi 9 floréal, an CCXXII, Konrad Karl a écrit :
> I tried to concatenate a few movies (h264/aac mp4, all produced by kdenlive/melt using
> the same rendering settings) using the concat demuxer like this on
> Fedora 20 x86_64:
> ffmpeg -f concat -i concat-test -c copy out.mp4
> The output file fails to play after the first input file (mplayer, ffplay, vlc)
> Trimmed down samples have already been uploaded to upload.ffmpeg.org/incoming
> Contents of the uploaded info file  and uncut console output of one concat command  below.

Can you test the new "-auto_convert 1" option to the concat demuxer and see
if it helps things? Note that the output will be in "annex B" format, and
needs an extra BSF to be muxed to MP4.


  Nicolas George
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