Achieve smooth video scrubbing with AVPlayer

Question

I am trying to achieve smooth video scrubbing with AVPlayer through UISlider I have searched and it seems Apple has a Technical Q&A and explain

Answer 1

I know this is an old problem, I encountered it too. The solution can help someone now. Apple sample make slider super smooth and pretty. To make the sample work:

private static var context = 1
func playVideo() {
  ...
  player.addObserver(self, forKeyPath: #keyPath(AVPlayer.currentItem.status), options: [.new, .initial], context: &VideoViewController.context)
  ...
 }

override public func observeValue(forKeyPath keyPath: String?, of object: Any?, change: [NSKeyValueChangeKey : Any]?, context: UnsafeMutableRawPointer?) {
    guard let keyPath = keyPath else { return }
    guard context == &VideoViewController.context else { return }
    switch keyPath {
    case #keyPath(AVPlayer.currentItem.status):
        if let newStatus = change.map({ $0[.newKey] as? NSNumber }), 
           let parsedNewStatus = newStatus.map({ AVPlayerItem.Status(rawValue: $0.intValue) ?? .unknown})  {
            playerCurrentItemStatus = parsedNewStatus
        } else {
            playerCurrentItemStatus = .unknown
        }
    default: break
    }
}

Observe and update playerCurrentItemStatus