title: AVPlayer play with update label cause an issue
body: <p>I have an issue with <code>AVPlayer</code> play and same time updates label.</p>
  <p>I have timer that updates label with progress of player, but that stuck my video at same position...check below image..After button click timer starts and cause an issue..</p>
  <p><a href="https://i.stack.imgur.com/UO7PT.gif" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/UO7PT.gif" alt="enter image description here" /></a></p>
  <p><strong>Code:</strong></p>
  <pre><code>func playVideo() {
      let path = NSBundle.mainBundle().pathForResource(&quot;videoname&quot;, ofType:&quot;mp4&quot;)
      let fileURL = NSURL(fileURLWithPath: path!)
      
      moviePlayer = AVPlayer(URL: fileURL)
      
      //  Play the video
      moviePlayer!.play()
  }
  
  @IBAction func progresss(sender: UIButton) {
      self.meterTimer = NSTimer.scheduledTimerWithTimeInterval(0.1,
          target:self,
          selector:&quot;updateAudioMeter:&quot;,
          userInfo:nil,
          repeats:true)
  }
  
  func updateAudioMeter(timer:NSTimer) {
      lbltime.text = &quot;\(CMTimeGetSeconds(moviePlayer!.currentItem.currentTime()))&quot;
  }  
  </code></pre>
  <p><strong>Sample project link</strong></p>
  <blockquote>
  <p><a href="http://s000.tinyupload.com/index.php?file_id=04212485841499293439" rel="nofollow noreferrer">Source code</a></p>
  <p>Note:please add video in bundle if you are use sample project.I just delete video because of file size</p>
  </blockquote>
  <p><strong>Question</strong></p>
  <ul>
  <li>How to avoid this? and why this happens because when I used MPMovieController it works great.</li>
  </ul>