title: Ideal method to get the duration of an AVPlayerItem in iOS 4.0
body: <p>What is the ideal way of getting the duration of an AVPlayerItem in iOS 4.0? The duration property for AVPlayerItem is only available in iOS 4.3 and later. <code>[[[player currentItem] asset] duration];</code> is always returning 0 for me. I am trying to play a song from the iPod library.</p>