How to play MPEG 4 (h.264 / AVC) videos that were encoded for the PSP

Hello,
I am trying to play a video in MPEG 4 (h.264 / AVC) format (file extension .mp4) that was encoded to play on the Sony PlayStationPortable (480x272) via QuickTime. The video plays perfectly via VideoLAN, mplayer or the PSP, but QuickTime only opens a black screen without any error message.
I am using the most current version of QuickTime on WindowsXP or Windows Vista. I have the same problem on either system.
Can anybody tell me how to resolve that problem? I do not want to reencode the videos, though.

QuickTimeKirk,
My goal is to create a looping animation for playback on an iPod. Should be easy right? Not with the QT!
I did the following:
1) Render a bunch of frames destined for looping.
2) Convert them to an uncompresses ".avi" file.
3) Open the ".avi" file in QT Pro.
4) Click "Loop"
5) Play movie. It loops nicely.
6) Click "Export" and select "Movie to QuickTime Movie"
7) Click "Save"
When I play the saved ".mov" file (You said QT retains the metadate requiring looping) IT DOES NOT LOOP!
To recap: This is a Quicktime movie. I selected looping when I created the bloody thing.
It
does
not
loop.
This *****.
This is REALLY, REALLY, ANNOYING! *** is going on with this QT Pro crap? I simply want to loop the movie. Is that really asking too much? I don't think so.
Can someone, anyone, please, please, tell me how to force the movie to loop on launch. Forcing an iPod user to muck about and select looping (can they even do that?) is not an option. Period.
Please help me,
Doug

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