hi, i have recorded a bunch of clips on a gopro hd hero cam in 720p (.mp4 files @ 30 fps). i already imported them to imovie hd, edited them together etc, added some music and whatnot. no problems so far. however i get an error message when i'm trying to export the movie. after about 75% it gives me an error message: the settings are: - expert settings - movie to mpeg4, options: - video: H264 - image size: 1280x720 HD - frame rate: 30 fps should i maybe be using another format? any help is much appreciated! thanks in advance.