title: Observer for Stream Switch
body: <p>I am trying to add an observer for when the stream profile changes due to bandwidth, but I cant seem to find the right property to monitor.</p>
  
  <p>I tried <strong>AVPlayerItemAccessLogEvent.switchBitrate</strong> but that only returns the bandwidth that forced the switch, not the actual profile that was switched to or from.</p>
  
  <p>Is there another property I should observe?</p>
  
  <p>Thanks for any help.</p>