In my app I'm processing videos with a AVAssetReader → AVAssetWriter combination.
When the app is sent to the background, I pause the video writing (and thus also don't read any longer). When entering the foreground again I want to continue the process. However, when I try to copyNextSampleBuffer from the reader's outputs, the reader fails with the following error:
Error Domain=AVFoundationErrorDomain Code=-11800 "The operation could not be completed"
UserInfo={NSUnderlyingError=0x170256d40 {Error Domain=NSOSStatusErrorDomain Code=-12131 "(null)"},
NSLocalizedFailureReason=An unknown error occurred (-12131),
NSLocalizedDescription=The operation could not be completed}
Is there any way I can continue to read asset samples after the app was suspended for some time?
PS: I also couldn't find the error code 12131 in any framework header...