Dump raw compressed video -dumpvideo

"Bill Crockett" <[email protected]>
Newsgroups gmane.comp.video.mplayer.user
Message-ID <65060F54D42140EAA80E87DBE4118EB0@Tower>
mplayer -dumpvideo some_video.mpg

Dump raw compressed video stream to stream.dump

To see these raw videos, I would use something like this:

mplayer -demuxer rawvideo -rawvideo fps=23.976:w=1280:h=720 stream.dump

mplayer -demuxer rawvideo -rawvideo fps=23.976:w=1280:h=720:format=i420:size=1382400 stream.dump

This seems to work with mpeg videos and 1 or 2 other formats, but is not working with an mp4 video with the x264 codec.  The video has nothing but static and will only play for about 4 seconds.  Then this:

Frame too small! (84152<1382400) Wrong format?  

What format and frame size is correct please?
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