I've just been away to Ecuador for 2 months and took my Camcorder with me - Sony HCR-HC3, I've placed some footage on my macbook and put it into imovie ready for me to edit it. The footage is in High Definition. Obviously I can't burn a DVD with High Definition footage, and I've already done a couple of trial exports both to idvd and quicktime, yet they are either not the quality that the movie is in imovie, or the video stops after a second or two, yet the audio continues. How can I cure this?