$ avplay /tmp/out.avi
avplay version 0.8.4-6:0.8.4-1, Copyright (c) 2003-2012 the Libav developers
  built on Oct 22 2012 21:36:00 with gcc 4.7.2
ALSA lib pcm_dmix.c:1018:(snd_pcm_dmix_open) unable to open slave
Input #0, avi, from '/tmp/out.avi':
  Metadata:
    encoder         : Lavf53.21.0
  Duration: 00:00:06.54, start: 0.000000, bitrate: 157629 kb/s
    Stream #0.0: Video: ffvhuff, bgra, 1008x1072, 24 tbr, 24 tbn, 24 tbc
[avsink @ 0x19ce620] auto-inserting filter 'auto-inserted scaler 0' between the filter 'src' and the filter 'out'
[scale @ 0x1993e60] w:1008 h:1072 fmt:bgra -> w:1008 h:1072 fmt:yuv420p flags:0x4