$ ffmpeg -i movie1.mov
FFmpeg version SVN-rUNKNOWN, Copyright (c) 2000-2004 Fabrice Bellard
  configuration:  --enable-gpl --enable-pp --enable-pthreads --enable-vorbis --enable-libogg --enable-a52 --enable-dts --enable-libgsm --enable-dc1394 --disable-debug --enable-shared --prefix=/usr
  libavutil version: 0d.49.0.0
  libavcodec version: 0d.51.11.0
  libavformat version: 0d.50.5.0
  built on Mar 26 2007 15:50:40, gcc: 4.1.2 20061115 (prerelease) (Debian 4.1.1-21)
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'movie1.mov':
  Duration: 00:00:49.7, start: 0.000000, bitrate: 3506 kb/s
  Stream #0.0(eng): Video: mpeg4, yuv420p, 640x480, 30.00 fps(r)
  Stream #0.1(eng): Audio: pcm_mulaw, 16000 Hz, mono, 128 kb/s
Must supply at least one output file