AVPlayer, notification for play/pause state?

Question

I\'m searching for a way to get notified the exact moment when AVPlayer starts playing. There\'s the \"rate\" property, but currently I am checking it periodically

Answer 1

    player = AVPlayer(url: URL(fileURLWithPath: path))
player.addObserver(self, forKeyPath: "rate", options: NSKeyValueObservingOptions.new, context: nil)

override func observeValue(forKeyPath keyPath: String?, of object: Any?, change: [NSKeyValueChangeKey : Any]?, context: UnsafeMutableRawPointer?) {
    if keyPath == "rate" {
        if player.rate > 0 {
            print("video started")
        }
    }
}

in swift