Apple has posted a support document outlining the new iFrame video format and the cameras which support it.
----- Setting a camcorder to record in the iFrame (960 x 540) format will result in optimized performance in iMovie 09.
The iFrame Video format is designed by Apple to speed up importing and editing by keeping the content in its native recorded format while editing. Based on industry standard technologies such as H.264 and AAC audio, iFrame produces small file sizes and simplifies the process of working with Video recorded with your camera.
To set a camcorder to the iFrame format: * Select the Video or Format settings from your camcorders Recording menu. * Select "960x540 30fps" or iFrame. Note: iFrame is the default video setting with Sanyo products and is indicated by a star icon:
iMovie 09 users should update to version 8.0.5 or later for the best iFrame Video format performance. You can do this by choosing Software Update from the Apple () menu and then installing any iMovie '09 updates that are listed. -----
Apple updated iMovie earlier today with support for the format.