i can not export my project from fcp x. It keeps giving me a QuickTime error -50 when I try to export for devices or to media browser. I did export a QuickTime movie through export media but the audio dissapeared a few minutes in and the video keeps going. This is crazy, I never had problems with iMovie or fcp7 . Any ideas ? UPDATE : I just shot a short video on my iPhone, imported and edited it in fcp x and it exported just fine. The project that won't export was shot avchd, how can I work out what about that project that interrupts the export?