can't embed msmpeg4v3 in MP4 container

[julian]

• download cut.mkv

How to reproduce:

% ffmpeg -i cut.mkv -acodec copy -vcodec copy -scodec copy cut.mp4
ffmpeg version 2.1.3-tessus Copyright (c) 2000-2013 the FFmpeg developers
  built on Jan 16 2014 13:50:59 with llvm-gcc 4.2.1 (LLVM build 2336.1.00)
  configuration: --prefix=/Users/tessus/data/ext/ffmpeg/sw --as=yasm --extra-version=tessus --disable-shared --enable-static --disable-ffplay --enable-gpl --enable-pthreads --enable-postproc --enable-libmp3lame --enable-libtheora --enable-libvorbis --enable-libx264 --enable-libxvid --enable-libspeex --enable-bzlib --enable-zlib --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libxavs --enable-version3 --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvpx --enable-libgsm --enable-libopus --enable-fontconfig --enable-libfreetype --enable-libass --enable-libbluray --enable-filters --enable-runtime-cpudetect
  libavutil      52. 48.101 / 52. 48.101
  libavcodec     55. 39.101 / 55. 39.101
  libavformat    55. 19.104 / 55. 19.104
  libavdevice    55.  5.100 / 55.  5.100
  libavfilter     3. 90.100 /  3. 90.100
  libswscale      2.  5.101 /  2.  5.101
  libswresample   0. 17.104 /  0. 17.104
  libpostproc    52.  3.100 / 52.  3.100
Input #0, matroska,webm, from '/Users/julian/Desktop/cut.mkv':
  Metadata:
    ENCODER         : Lavf54.63.104
  Duration: 00:00:10.00, start: 0.000000, bitrate: 543 kb/s
    Stream #0:0: Video: msmpeg4v3, yuv420p, 512x288, SAR 1:1 DAR 16:9, 25 fps, 25 tbr, 1k tbn, 1k tbc (default)
File '/Users/julian/Desktop/cut.mp4' already exists. Overwrite ? [y/N] y
[mp4 @ 0x102018800] track 0: could not find tag, codec not currently supported in container
Output #0, mp4, to '/Users/julian/Desktop/cut.mp4':
  Metadata:
    encoder         : Lavf55.19.104
    Stream #0:0: Video: msmpeg4v3, yuv420p, 512x288 [SAR 1:1 DAR 16:9], q=2-31, 25 fps, 90k tbn, 1k tbc (default)
Stream mapping:
  Stream #0:0 -> #0:0 (copy)
Could not write header for output file #0 (incorrect codec parameters ?): Operation not permitted

[Carl Eugen Hoyos]

This is not a limitation of FFmpeg but of the isom container that does not specify msmpeg4.

For future tickets: Please remember to always test current FFmpeg git head before reporting problems as explained on ​http://ffmpeg.org/bugreports.html