720p MP4 H.264 video not syncing?

Hi, I've got an odd problem with video playback on my iPhone. I have one 63mb video which is just over four minutes in length. Its resolution is 1280 x 720, encoded in H.264, bit rate of 122kbps, total bit rate of 2122kbps. It syncs to my iPhone and plays flawlessly.
I have two lengthy projects I've exported to MP4 with the same specs as above. The main difference is that they're both closer to two hours in length. iTunes displays the same info, but slightly different bit rates and the total bitrate is "not available". These two videos don't sync to the iPhone. "...because it cannot be played on this iPhone."
I have tried selecting both and in the advanced menu selecting "Create iPod or iPhone version", but this cuts the vertical resolution in half. I've looked around online but haven't found a solution.
Any help you could give me would be greatly appreciated.

It sounds like the source video may be using a incompatible codec. Try changing the transcoding preferences or using another utility.
You can make sure there isn't anything wrong with iTunes or the iPhone by testing with known good content.

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Message was edited by: killerbear (changed "role" to "roll")

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720p MP4 H.264 video not syncing?

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