# test video out.avi created with:
# ffmpeg -t 30 -i 2.avi -vcodec copy -acodec mp2 -ab 224k -ac 2 -ar 48000 -sameq -y out.avi

# tovid output
Analysis of file /work/svn/tovid/src/out.avi:
  720 x 480 pixels, 23.977 fps
  Duration (best guess): 00:00:30 (HH:MM:SS)
  DIV3 video with mp2 audio

=========================================================

Audio stream is already compliant with PAL DVD.
No re-encoding is necessary. To force encoding, use -force

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Target format:
  720 x 576 pixels, 25.000 fps
  m2v video with ac3 audio
  5400 kbits/sec video, 224 kbits/sec audio

=========================================================

Using auto-detected aspect ratio 150:100 (override with -aspect)
Letterboxing vertically
Input is not 25.000 fps. Framerate will be adjusted.
Scaling picture to 720 x 512
Centering picture against a 720 x 576 black background

=========================================================

Found compliant audio and dumping the stream.
This sometimes causes errors when multiplexing; add '-force' to the tovid
command line to re-encode if multiplexing fails.
Copying the existing audio stream with the following command:
nice -n 0 ffmpeg -i /work/svn/tovid/src/out.avi -vn -acodec copy /home/robert/tmp/out.avi.enc.0/audio.ac3

Processing started. Please wait...
    ---  Copying compliant audio stream: 1 MB written to audio.ac3