An AVPlayerItem can only ever be assigned to one AVPlayer. Once an AVPlayerItem has been added to an AVPlayer, future attempts to add it to a different AVPlayer will SIGABRT the app.

So, given an AVPlayerItem, how can you determine:

  1. What AVPlayer it is currently associated with? and
  2. If it has ever been inserted into an AVPlayer at any point in the past?

The following code demonstrates the problem reliably:

AVPlayerItem *item = [AVPlayerItem playerItemWithURL:[NSURL URLWithString:@"http://devimages.apple.com/iphone/samples/bipbop/bipbopall.m3u8"]];
AVPlayer *firstPlayer = [[AVPlayer alloc] init];
[firstPlayer replaceCurrentItemWithPlayerItem:item];
AVPlayer *secondPlayer = [[AVPlayer alloc] init];
[secondPlayer replaceCurrentItemWithPlayerItem:item];

And here's the error message:

*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'An AVPlayerItem cannot be associated with more than one instance of AVPlayer'
ios avplayer
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