Why won't iMovie 10 export my HD video at 1080?
I've spent a couple of days editing a whole load of video, adding music, titles, transitions etc. and now when I come to export it to a file, the 1080 option is greyed out and the max resolution is 720. Clicking back onto the project I notice now that the project is 720. The thing is, every single video clip is 1080 and nowhere did I ever tell it I wanted a 720 project. If I set up a new blank project and drag in those same clips it lets me export to 1080 - but of course I'd have to do those two days work all over again. Does anyone know what causes this, and how I can get iMovie to export my original project at 1080? It's very odd - even if I delete all but one clip the 1080 option is still greyed out. If I delete that clip and drag it back into the project, the 1080 option is back. It seems to want me to delete everything and start again but I just can't face redoing all that work. Can anyone help? Thanks. iMovie version is 10.0.2.
OS X Mavericks (10.9.2), 8GB RAM, 2.3Ghz Intel Core i7