title: playing music by url
body: <p>I want to play the music from internet by url.
  I create a simply project that has one button with the following code:</p>
  
  <pre><code>NSURL *url = [[NSURL alloc] initWithString:@"http://someURL.mp3"];
  NSError **err;
  QTMovie *movie = [[QTMovie alloc] initWithURL:url error:err];
  [movie play];
  </code></pre>
  
  <p>It works but with some delay (I think because it waits while file has been fully downloaded).<br>
  So what I need to do that the music starts to play immediately (when, for example, 10% of file has been downloaded)?</p>