e@fakir:~/apps/mplayer/TOOLS$ cat midentify 
#!/bin/sh
#
# This is a wrapper around the -identify functionality.
# It is supposed to escape the output properly, so it can be easily
# used in shellscripts by 'eval'ing the output of this script.
#
# Written by Tobias Diedrich <ranma+mplayer@tdiedrich.de>
# Licensed under GNU GPL.

if [ -z "$1" ]; then
        echo "Usage: midentify <file> [<file> ...]"
        exit 1
fi

mplayer -vo null -ao null -frames 0 -identify "$@" 2>/dev/null |
        sed -ne '/^ID_/ {
                          s/[]()|&;<>`'"'"'\\!$" []/\\&/g;p
                        }'
               
e@fakir:~/apps/mplayer/TOOLS$ ./midentify ~/Desktop/StevieRayVaughanTexa.avi 
ID_VIDEO_ID=0
ID_AUDIO_ID=1
ID_FILENAME=/home/rune/Desktop/StevieRayVaughanTexa.avi
ID_DEMUXER=avi
ID_VIDEO_FORMAT=divx
ID_VIDEO_BITRATE=919736
ID_VIDEO_WIDTH=452
ID_VIDEO_HEIGHT=360
ID_VIDEO_FPS=25.000
ID_VIDEO_ASPECT=0.0000
ID_AUDIO_FORMAT=85
ID_AUDIO_BITRATE=128000
ID_AUDIO_RATE=0
ID_AUDIO_NCH=0
ID_LENGTH=574.56
ID_VIDEO_CODEC=ffodivx
ID_AUDIO_BITRATE=128000
ID_AUDIO_RATE=44100
ID_AUDIO_NCH=2
ID_AUDIO_CODEC=mp3
e@fakir:~/apps/mplayer/TOOLS$