avplayercontrollerで再生する有効なURLを確認しますか？

Question

私は3つのURLを持っており、これらのURLに再生するビデオリンクがあるかどうかを確認する必要があります。私はそれがURLにビデオを含んでいないと、次のURLからビデオを再生する場合、リンクをescする必要があります。次のコードは、再生状態を追跡するのに役立ちます。

let playerAV = AVPlayerViewController() 
    var player = AVPlayer() 
    playerAV.player = player 
    playerAV.view.frame = CGRectMake(0, 0, self.videoView.frame.width, self.videoView.frame.height) 
    self.addChildViewController(playerAV) 
    self.videoView.addSubview(playerAV.view) 
    playerAV.didMoveToParentViewController(self) 
    playerAV.player?.play() 
    addObserverOfMoviePlayer() 

NSNotificationCenter.defaultCenter().addObserver(self, selector: #selector(ChannelDetailViewController.notificationObserver(_:)), name:AVPlayerItemDidPlayToEndTimeNotification , object: player.currentItem) 
    _ = UIDevice.beginGeneratingDeviceOrientationNotifications 
    NSNotificationCenter.defaultCenter().addObserver(self, selector: #selector(ChannelDetailViewController.deviceOrientationDidChange(_:)) , name: 
     UIDeviceOrientationDidChangeNotification, object: nil) 
    playerAV.player!.addObserver(self, forKeyPath: "rate", options: NSKeyValueObservingOptions.New, context: nil) 
    playerAV.player!.currentItem!.addObserver(self, forKeyPath: "playbackBufferEmpty", options: NSKeyValueObservingOptions.New, context: nil) 
    playerAV.player!.currentItem!.addObserver(self, forKeyPath: "playbackLikelyToKeepUp", options: NSKeyValueObservingOptions.New, context: nil) 

override func observeValueForKeyPath(keyPath: String?, ofObject object: AnyObject?, change: [String : AnyObject]?, context: UnsafeMutablePointer<Void>) { 

    if keyPath == "rate" { 

     if let rate = change?[NSKeyValueChangeNewKey] as? Float { 
     if playerAV.player!.currentItem!.status == AVPlayerItemStatus.ReadyToPlay{ 
      if rate != 0 && playerAV.player!.error == nil { 

      print("normal playback") 
      timer = NSTimer.scheduledTimerWithTimeInterval(1, target: self, selector: #selector(ChannelDetailViewController.somAction), userInfo: nil, repeats: true) 

      } 
      else{ 
      timer?.invalidate() 
      print("movie player stopped") 
      } 

     }else if playerAV.player!.currentItem?.status == AVPlayerItemStatus.Unknown{ 
      timer?.invalidate() 
      print("not ready to play") 
     } 
     } 
    } 
    if keyPath == "playbackBufferEmpty"{ 

     if playerAV.player?.currentItem?.playbackBufferEmpty == true{ 
     timer?.invalidate() 
     print("movie player stopped due to no buffer") 
     } 
    } 

    if keyPath == "playbackLikelyToKeepUp" { 

     if playerAV.player?.currentItem?.playbackLikelyToKeepUp == true{ 

     print("movie player playing after enough data in buffer") 
     playerAV.player?.play() 

     } 
    } 
    } 

Answer 1

それは長さがこのコードでゼロとして返されます無効だ場合だけでビデオの長さを確認してください。

let assets = AVAsset(URL: NSURL(fileURLWithPath: filePath)) 
let length=Float(assets.duration.value)/Float(assets.duration.timescale) 
if length != 0.0 { 
// play it 
} 

それでも問題が解決しない場合は、いつでも私に尋ねることができます。