AMV input sample

D:\Users\User\Documents\Visual Studio 2010\Projects\ConversionTests>ffmpeg -i sample.amv
ffmpeg version 0.9, Copyright (c) 2000-2011 the FFmpeg developers
  built on Dec 12 2011 15:34:57 with gcc 4.6.1
  configuration: --enable-gpl
  libavutil    51. 32. 0 / 51. 32. 0
  libavcodec   53. 42. 0 / 53. 42. 0
  libavformat  53. 24. 0 / 53. 24. 0
  libavdevice  53.  4. 0 / 53.  4. 0
  libavfilter   2. 53. 0 /  2. 53. 0
  libswscale    2.  1. 0 /  2.  1. 0
  libpostproc  51.  2. 0 / 51.  2. 0
[avi @ 01400f60] scale/rate is 0/0 which is invalid. (This file has been generated by broken software.)
    Last message repeated 1 times
Input #0, avi, from 'sample.amv':
  Duration: 00:00:00.00, start: 0.000000, bitrate: -2147483 kb/s
    Stream #0:0: Video: amv, yuvj420p, 176x128, 16 tbr, 16 tbn, 16 tbc
    Stream #0:1: Audio: adpcm_ima_amv ([1][0][0][0] / 0x0001), 22050 Hz, 1 channels, s16, 352 kb/s
At least one output file must be specified