Synching audio problem with MPEG-4 video in QuickTime

Hello,
I’m having a problem with MPEG-4 video file I created with TechSmith Camtasia (6.0.1).
Problem: The audio does not sync up with the video when played with Apple QuickTime 7.6 (latest build) in Windows Vista. The longer the video plays the more out of sync the audio is. Here's where it gets interesting:
When I play the file using Adobe Media Player or Adobe Flash Player (plug-in in Internet Explorer), the video and audio sync up and all is good.
Is there a problem with how Quicktime decompresses this type of file?
Does anyone have any idea what is happening?
Thanks,
Leo

If I remember well, N70 plays mp4 video without problems. Try resizing during encoding to 176 x 144 and reducing frame rate to 15 frames per second. Also try to keep data rate below 200 kb/s. If you are using MediaCoder do not go with default settings for Nokia N70, they are too optimistic.
Here is link to document titled Creating Mobile Videos
http://www.forum.nokia.com/info/sw.nokia.com/id/b0c449c1-8e67-4c60-bd50-18a2b4f1e09b/Creating_Mobile...
Hope it helps.
www.2010-solutions.co.za

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If I remember well, N70 plays mp4 video without problems. Try resizing during encoding to 176 x 144 and reducing frame rate to 15 frames per second. Also try to keep data rate below 200 kb/s. If you are using MediaCoder do not go with default settings for Nokia N70, they are too optimistic.
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[http://java.sun.com/javase/technologies/desktop/media/jmf/2.1.1/solutions/RTPConnector.html]
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