title: iOS : how to know if a live audio stream is "On air"?
body: <p>I am developing an app that have to stream live audio (from a m3u distant file) and I am looking for a way to check if the live-stream is "On air" or "Off air". The audio player uses <code>AVPlayer</code>.</p>
  
  <p>I made my homeworks, but did'nt find anything on that subject...</p>
  
  <p>Thanks a lot...</p>