Built-in iSight video is jerky when recorded into iMovie.

Hello,
When I record video in iMovie directly from my built-in iSight, the resulting video is rather jerky - it doesn't look like the frame rate is slow, it's just that if I move my arm quickly, for example, while it may be a smooth motion in real life, the recorded video has little stutters in the motion, almost if some of the frames are out-of-order. I don't have this issue when using iChat - everything looks fine there. I have a MacBook Pro 17-inch (Mid-2009), with iLife '09, Mac OS X 10.6.7, 4 GB RAM, and about 100 GB of free space on my hard drive. Everything is completely up-to-date via Software Update, and I just ran Repair Disk Permissions in Disk Utility last week. The last time I recorded into iMovie, I didn't have any other applications running on the computer, and it still happened. The computer was sitting stationary on a table. I was using a professional microphone through a FireWire interface, and the audio recorded perfectly - it was just the video that had issues. The audio and video stayed perfectly in-sync the whole time, too. The video looked jerky in iMovie immediately after recording, and still looked jerky after being uploaded to YouTube. I've seen other people's videos on YouTube that exhibit this behavior, and they generally look fine if I go down to a lower resolution for playback, so I'm guessing I'm not alone - it could either be an iSight issue or an iMovie issue.

Sorry, I meant when I use the 'Q' command to put the video onto the storyline. I use the Import files to bring the files into my library of videos and it looks fine there before using 'Q' to stack the video onto the storyline. 99 percent of the time it works fine, it just has this flipped error when building multi-video composites, it has never happened when I build a normal video project.

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Message was edited by: kiko-man

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I have seen posts from three or four users about this problem on iNtel Macs. You should try the suggestions offered in the other thread where you posted about this:
http://discussions.apple.com/message.jspa?messageID=5112825#5112825
If none of those suggestions resolve your problem, you likely have a hardware problem. In that case, contact the retailer who sold you your Mac, Apple, or your Apple-Authorized Service Provider for professional help.
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Built-in iSight video is jerky when recorded into iMovie.

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