You can't cut out a small generic clip to poke at?
If not your on your own try the free Download GSpot 2.70a
GSpot establishes what video and audio codecs are required to play any video. Shows framerate, duration, aspect ratio, bitrates, structure info, and more. Supports AVI, MPG, VOB, DVD, VCD, SVCD, MP4, FLV, MOV, QT, RM, SWF, WMV, ASF.