don't you hate trying to convert MPEG files. our youngest daughter and her friend have been filming a mini-movie over a couple of weeks on our little digital camera (yes, yes, I REALLY need a good SLR...)
she had brought them all into iPhoto and I said we'd just pop them into iMovie for her to edit. lo and behold, they're MPEG-1 files. Quicktime played them fine but iMovie could'nt figure it out. (For the uninitiated, MPEG muxes and demuxes video and audio. ie. processes them separately and then puts them back together. You don't have a movie file with two separate, synced audio and video streams.)
I told it her it would be easy to convert... Quicktime doesn't. ffmegX didnt, Export2QT Demo did but with a weird result.
Thankfully MPEG StreamClip, a nice free app for Mac and Windows did the job of converting the files to DV PAL Quicktime files suitable for iMovie.
Worth getting as you may need it sometime.
now back to cooking kangaroo mince...