I am not directly developing in xcode. I am using Unity and plugin AVPro to play move.
There is a problem in my project. It appears sometimes but hard to recreate. Before it appears, i can play any movies in my project, which means they are in correct format. But when the problem appears, one of the movie can't play. It loads the meta data(fps, resolution), but stuck at the first frame. And i find out that my device can't play movie in other apps either (but it can't the movies that already played). I can drag the timeline to reach any frame, but it can't play. The only way to solve it is to turn off turn on the device.
My devices are iPad Air 2 (10.0.2) and iPad mini 2(10.2.1)