#!/bin/bash

# MPEG1 MPEG2 RV10 RV13 RV20 RV30
# [cvid] [DIV3] [DIVX] [IV32] [MJPG] [MPG4] [MP42] [MP43] [WMV1] [WMV2] [XVID] [YVU9]

for i in "$*"
do
    echo $i: `mplayer -frames 0 -vo null -ao null "$i" 2>/dev/null | grep VIDEO:`
done