No Video on H.264 Files

With H.264 avi files I get only sound, no video. I have Perian installed and so far the H.264 avi files are the only ones that do not play properly. Any help would be appreciated. Thanks.

The only files that I have had a problem with are the h.264 (Perian) files. I found a media player that will play them, and I'm not going to set a seperate user account just so I can view those few files. If it's not a systemic problem, I'd love to know what it is, because they don't play. I emptied my QuickTime folder. I uninstalled QuickTime, Perian, DivX, etc. and reinstalled QuickTime, Perian, and flip4mac. It still doesnt' work. Maybe it's a difference in operating systems. I think you have a different version than I do.

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    www.hdfever.fr (in french ... but very usefull) maybe could help U.
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