Why does AVSampleBufferDisplayLayer fail with Operation Interrupted (-11847)?

Question

I'm using an AVSampleBufferDisplayLayer to decode and display H.264 video streamed from a server. When my app goes into the background and then returns to the foreground, the decoding process gets screwed up and the AVSampleBufferDisplayLayer fails. The error I'm seeing is:

H.264 decoding layer has failed: Error Domain=AVFoundationErrorDomain
  Code=-11847 "Operation Interrupted" UserInfo=0x17426c500
  {NSUnderlyingError=0x17805fe90 "The operation couldn’t be completed.
    (OSStatus error -12084.)",
   NSLocalizedRecoverySuggestion=Stop other operations and try again.,
   NSLocalizedDescription=Operation Interrupted}

Has anybody else run into issues like this with AVSampleBufferDisplayLayer? What does this mean?

I have tried destroying the AVSampleBufferDisplayLayer and creating a new one when I get the error, but then I start receiving other errors from the H.264 decoder:

Error Domain=AVFoundationErrorDomain Code=-11821 "Cannot Decode"
UserInfo=0x1740e9700 {AVErrorMediaSubTypeKey=(1635148593),
  NSLocalizedFailureReason=The media data could not be decoded. It may be damaged.,
  NSUnderlyingError=0x174247680 "The operation couldn’t be completed. (OSStatus error -12909.)",
  AVErrorMediaTypeKey=vide,
  AVErrorPresentationTimeStampKey=CMTime: {7/30 = 0.233},
  NSLocalizedDescription=Cannot Decode}

I was not receiving any of those errors before the AVSampleBufferDisplayLayer failed.

Answer 1

I solved it

// create renderer
let renderingLayer = AVSampleBufferDisplayLayer()

// when enqueue data
if renderingLayer.status == .failed {
    // this way
    renderingLayer.flushAndRemoveImage()
}