iOS8 AVAudioSession setActive error

Question

I\'m testing my app in XCode 6 and find an issue with AVAudioSession in iOS8.

When I call

[[AVAudioSession sharedInstance] setActive:NO error

Answer 1

Be warned. If you are playing a movie (even with no sound and the audio track removed) then it will still create an I/O thread which will always cause the above error to be thrown.