I tried using iMovie ’09 (version 8.0.4) (part of iLife ’09) to put together a quick DVD copy of video from my miniDV video camera.
I didn’t particularly care for it, compared with iMovie HD (version 6.0.3).
iMovie ’09 takes the DV files and reencodes them to some intermediate format, which then iDVD has to reencode them again. Double the time, plus potential image degradation along the way.
iMovie HD will export a .mov file which is in essence a reference to video clips in the iMovie project, then iDVD eventually reencodes that into MPEG-2 format during DVD burning.
Only reencoding once, and a reasonable amount of time to do the encoding.
Good thing the iLife installer did not erase iMovie HD but merely moved it to a different location.
Maybe iMovie ’09 is good for non-DVD output projects, but it’s pretty much the wrong thing for DVDs if you’re trying to be efficient with your time.