Mp4 or AIFF - jittery iMovie

i'm making a 'ken burns' movie with about 90 photos imported from iphotom and downloaded an iTune for it.
problem is - when i preview it and try and export the movie (1 min 50) it's really jittery with audio dropouts and freezes. i might of expected this on a G3, but on a dual G5 - with nothing else running?!
i need it for monday, for a client (of course). would it help if i converted the mp4 to an AIFF file and used that?
what else can i try? HELP!
regards,
james b (uk)

Check out the Audio MIDI Setup app (Utilities folder) and some solutions.
Other software can alter the settings (Pro Tools, etc) of the audio output and these can lead to "jerky" playback and audio issues.
Set the audio output format to 44100Hz and try the file again.
Be sure you "authorize" your iTunes purchase and don't expect to be able to "share" purchased music. It must be "converted" first and iTunes can do that for you.

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mcchuch wrote:
There's also a small yellow circle in the bottom left corner of the clip in the viewer.
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http://support.apple.com/kb/ts3249
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Delete the User Preferences
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2. Open the Library folder and then the Preferences folder.
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Additional information:
Mac OS X: How to troubleshoot a software issue
http://support.apple.com/kb/HT1199
Thanks,
Matt M.

Mp4 or AIFF - jittery iMovie

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