title: Accessing URL from AVPlayer object?
body: <p>Is there a way to access the URL from an AVPlayer object that has been initialized with a URL, as in:</p>
  
  <pre><code>NSURL *url = [NSURL URLWithString: @"http://www.example.org/audio"];
  self.player = [AVPlayer playerWithURL: url];
  </code></pre>