How to configure AVQueuePlayer?

To configure an AVQueuePlayer, you can follow these general steps:

1. Initialize the AVQueuePlayer: Create an instance of AVQueuePlayer with an array of AVPlayerItem objects. Each AVPlayerItem represents a piece of media you want to play in sequence.

   let playerItem1 = AVPlayerItem(url: URL(string: "https://example.com/video1.mp4")!)
   let playerItem2 = AVPlayerItem(url: URL(string: "https://example.com/video2.mp4")!)
   let queuePlayer = AVQueuePlayer(items: [playerItem1, playerItem2])
   

2. Add or Remove Items: You can add or remove items from the queue as needed using insert(_:after:) to add and remove(_:completionHandler:) to remove.

   let playerItem3 = AVPlayerItem(url: URL(string: "https://example.com/video3.mp4")!)
   queuePlayer.insert(playerItem3, after: playerItem1)
   

3. Control Playback: Use methods like play(), pause(), and advanceToNextItem() to control playback.

   queuePlayer.play()
   

4. Observe Player Status: You can observe the player's status and the current item to handle events like playback completion or errors.

   queuePlayer.addObserver(self, forKeyPath: "status", options: [.new, .initial], context: nil)
   

5. Handle Events: Implement the observer method to respond to changes in the player's status or the current item.

   override func observeValue(forKeyPath keyPath: String?, of object: Any?, change: [NSKeyValueChangeKey : Any]?, context: UnsafeMutableRawPointer?) {
       if keyPath == "status" {
           if queuePlayer.status == .readyToPlay {
               // Player is ready to play
           } else if queuePlayer.status == .failed {
               // Handle error
           }
       }
   }
   

For more detailed information on AVFoundation and media playback, you might find the session Discover media performance metrics in AVFoundation helpful, especially the section on subscribing to events.