Input #0, avi, from 'originalfile.amv':
  Duration: 00:00:00.00, start: 0.000000, bitrate: -2147483 kb/s
    Stream #0:0: Video: amv, yuvj420p, 320x240, 20 tbr, 20 tbn, 20 tbc
    Stream #0:1: Audio: adpcm_ima_amv ([1][0][0][0] / 0x0001), 22050 Hz, 1 channels, s16, 352 kb/s
---using the 320x240 and 20 bit framerate,
---I get:::::::::::::::::::::::::::::::::>>
Input #0, avi, from 'filein.avi':
  Metadata:
    encoder         : Lavf52.111.0
  Duration: 00:04:45.76, start: 0.000000, bitrate: 323 kb/s
    Stream #0:0: Video: mpeg4 (Simple Profile) (xvid / 0x64697678), yuv420p, 176x144 [SAR 1:1 DAR 11:9], 12 tbr, 12 tbn, 12 tbc
    Stream #0:1: Audio: aac ([255][0][0][0] / 0x00FF), 44100 Hz, stereo, s16, 11 kb/s
File 'fileout320x240.amv' already exists. Overwrite ? [y/N] y
w:176 h:144 pixfmt:yuv420p tb:1/1000000 sar:1/1 sws_param:
[scale @ 0x92847c0] w:176 h:144 fmt:yuv420p -> w:320 h:240 fmt:yuv420p flags:0x4
Incompatible sample format 's16' for codec 'ac3', auto-selecting format 'flt'
[ac3 @ 0x9259ba0] channel_layout not specified
[ac3 @ 0x9259ba0] No channel layout specified. The encoder will guess the layout, but it might be incorrect.
Output #0, avi, to 'fileout320x240.amv':
  Metadata:
    ISFT            : Lavf53.32.100
    Stream #0:0: Video: mpeg4 (hq) (FMP4 / 0x34504D46), yuv420p, 320x240 [SAR 11:12 DAR 11:9], q=3-3, 200 kb/s, 20 tbn, 20 tbc
    Stream #0:1: Audio: ac3 ([0] [0][0] / 0x2000), 22050 Hz, mono, flt, 128 kb/s
Stream mapping:
  Stream #0:0 -> #0:0 (mpeg4 -> mpeg4)
  Stream #0:1 -> #0:1 (aac -> ac3)