FFmpeg version UNKNOWN, Copyright (c) 2000-2010 the FFmpeg developers
  built on Nov  9 2010 12:08:03 with gcc 4.2.1 (Apple Inc. build 5664)
  configuration: --prefix=/Users/worth/OtherApps/ffmpeg/ffmpeg/../local/i386 --enable-static --enable-shared --enable-gpl --enable-version3 --enable-libmp3lame --enable-pthreads --enable-libvorbis --enable-libx264 --enable-libxvid --enable-libspeex --enable-libopencore_amrwb --enable-libopencore_amrnb --enable-libvpx --enable-memalign-hack --disable-debug --disable-stripping --arch=x86_32
  libavutil     50.33. 0 / 50.33. 0
  libavcore      0.12. 0 /  0.12. 0
  libavcodec    52.94. 3 / 52.94. 3
  libavformat   52.84. 0 / 52.84. 0
  libavdevice   52. 2. 2 / 52. 2. 2
  libavfilter    1.59. 0 /  1.59. 0
  libswscale     0.12. 0 /  0.12. 0
[avi @ 0x1808010] max_analyze_duration reached
Input #0, avi, from '/Users/willg/Movies/Miro/fireworks_prank.avi':
  Metadata:
    encoder         : Lavf50.5.0
  Duration: 00:00:46.60, start: 0.000000, bitrate: 247 kb/s
    Stream #0.0: Video: mpeg4, yuv420p, 320x214 [PAR 1:1 DAR 160:107], 30 fps, 30 tbr, 30 tbn, 30 tbc
    Stream #0.1: Audio: mp3, 22050 Hz, 1 channels, s16, 8 kb/s
At least one output file must be specified
