Movies converted to H.264 come out brighter. Is there a solution?

I love the quality of H.264 but after conversion they always seem to be brighter/lighter then the original. Is there a solution?
Thanks
Clank

This is a long-standing issue with the way Apple's H.264 codec deals with gamma settings. You can find a fuller discussion in this thread:
http://discussions.apple.com/thread.jspa?messageID=8551140&#8551140
Your best bet is going to be using the x264 Encoder (a third party H.264 implementation), which doesn't exhibit the gamma problem:
http://www.apple.com/downloads/macosx/video/x264encoder.html
Good luck!

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