title: An AVPlayerItem can occupy only one position in a player's queue at a time
body: <p>Im getting this error when trying to play a video from my temp directory:</p>
  
  <pre><code>NSString *tmpDir = [NSTemporaryDirectory() stringByAppendingString:@"/"];
  NSString *url = [tmpDir stringByAppendingString:videoToPlay];
  
  MPMoviePlayerController *player =
  [[MPMoviePlayerController alloc]
   initWithContentURL:[NSURL fileURLWithPath:url]];
  </code></pre>
  
  <p>Why am i getting this error "An AVPlayerItem can occupy only one position in a player's queue at a time."  </p>
  
  <p>Isnt that code correct? Am i missing something simple?</p>