I used quicktime to convert and compress a .avi video into a h.264 video. It compressed from 700mb to 200mb with the same quality, but the only problem is that when i try to sync it to my ipod touch it says that this video is not compatible. it has the .m4v extension? But when i convert it using the iphone preset it works fine, but it is 600 mb? Does any one know what is going on?