mplayer demuxer does not recognize the file
likewise with -demuxer lavf
requires -demuxer lavf -lavfdopts format=mov,mp4,m4a,3gp,3g2,mj2
ffmpeg also requires demuxer to be specified.

[cami:~/desktop/nzb] compn% ffmpeg -f mov,mp4,m4a,3gp,3g2,mj2 -i /Volumes/E\$/1burned/1clips/square_pegs.mov
FFmpeg version SVN-r12620, Copyright (c) 2000-2008 Fabrice Bellard, et al.
  configuration: --extra-cflags=-I/usr/local/include/SDL --extra-ldflags=-L/usr/local/lib
  libavutil version: 49.6.0
  libavcodec version: 51.53.0
  libavformat version: 52.12.0
  libavdevice version: 52.0.0
  built on Mar 28 2008 09:41:33, gcc: 3.3 20030304 (Apple Computer, Inc. build 1809)
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/Volumes/E$/1burned/1clips/square_pegs.mov':
  Duration: 00:02:40.2, start: 0.000000, bitrate: 321 kb/s
    Stream #0.0(eng): Video: mjpeg, yuvj420p, 160x120, 30.00 tb(r)
    Stream #0.1(eng): Audio: pcm_u8, 11127 Hz, mono, 89 kb/s
Must supply at least one output file


[cami:~/desktop/nzb] compn% ffmpeg -i /Volumes/E\$/1burned/1clips/square_pegs.mov
FFmpeg version SVN-r12620, Copyright (c) 2000-2008 Fabrice Bellard, et al.
  configuration: --extra-cflags=-I/usr/local/include/SDL --extra-ldflags=-L/usr/local/lib
  libavutil version: 49.6.0
  libavcodec version: 51.53.0
  libavformat version: 52.12.0
  libavdevice version: 52.0.0
  built on Mar 28 2008 09:41:33, gcc: 3.3 20030304 (Apple Computer, Inc. build 1809)
Input #0, ac3, from '/Volumes/E$/1burned/1clips/square_pegs.mov':
  Duration: 00:42:52.3, bitrate: 20 kb/s
    Stream #0.0: Audio: 0x0000, 12000 Hz, stereo, 20 kb/s
Must supply at least one output file