I patched file the other day to give details on AVI files, mainly because I wanted a command line tool to quickly check codecs. Here's an example of the new output:
foobar.avi: RIFF (little-endian) data, AVI, 312 x 140, 25.00 fps, video: DivX 5, audio: MPEG-1 Layer 3 (stereo, 44100 Hz)
The patch was included in the new version released a couple of days ago, so go forth and download 4.06 if you want this.