[Libav-user] AMV format

[YIRAN LI]

> YIRAN LI <mrfun.china at ...> writes:
>
> > $ ffmpeg.exe -i big_buck_bunny.mp4 a.amv
>
> $ ffmpeg -i input -vcodec amv -acodec adpcm_ima_amv -f avi out.amv
>
> I suspect the file format may be different from avi
> but doesn't have to. Please test and report back.
>
> Carl Eugen
>


​Hi Carl,

I tried your command to do a conversion. Here's the output:

$ ffmpeg.exe -i big_buck_bunny.mp4 -vcodec amv -acodec adpcm_ima_amv -f avi
out.amv
ffmpeg version N-74386-g542562e Copyright (c) 2000-2015 the FFmpeg
developers
  built with gcc 4.9.3 (GCC)
  configuration: --enable-gpl --enable-version3 --disable-w32threads
--enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r
--enable-gnutls --enable-iconv --enable-libass --enable-libbluray
--enable-libbs2b --enable-libcaca --enable-libdcadec --enable-libfreetype
--enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug
--enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb
--enable-libopenjpeg --enable-libopus --enable-librtmp
--enable-libschroedinger --enable-libsoxr --enable-libspeex
--enable-libtheora --enable-libtwolame --enable-libvidstab
--enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis
--enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264
--enable-libx265 --enable-libxavs --enable-libxvid --enable-lzma
--enable-decklink --enable-zlib
  libavutil      54. 30.100 / 54. 30.100
  libavcodec     56. 57.100 / 56. 57.100
  libavformat    56. 40.101 / 56. 40.101
  libavdevice    56.  4.100 / 56.  4.100
  libavfilter     5. 32.100 /  5. 32.100
  libswscale      3.  1.101 /  3.  1.101
  libswresample   1.  2.101 /  1.  2.101
  libpostproc    53.  3.100 / 53.  3.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'big_buck_bunny.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
  Duration: 00:01:00.19, start: 0.000000, bitrate: 129 kb/s
    Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p,
96x96 [SAR 1:1 DAR 1:1], 51 kb/s, 23.81 fps, 23.92 tbr, 19128 tbn, 38256
tbc (default)
    Metadata:
      handler_name    : VideoHandler
    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 22050 Hz,
stereo, fltp, 75 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
Unknown encoder '
​​
adpcm_ima_amv'

​And I also found this open ticket https://trac.ffmpeg.org/ticket/747 so I
guess
​
adpcm_ima_amv
​ is not supported yet.

​If I use -an then I can correctly generate a video only amv file.


Thanks

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