title: Fixing audio drop outs of an HLS stream
body: <p>I have an HLS stream that drops out on Android and the iOS but plays fine in a web browser (flash).</p>
  
  <p><strong>Encoder:</strong> Wirecast Pro 5.0.3</p>
  
  <p><strong>Encoder Settings:</strong> Output Format - (video) Flash, h.264 480x270 24fps, 365 kbps, keyframes every 48 (audio) AAC mono 96kbps 44.1hz</p>
  
  <p><strong>Stream Address:</strong> <a href="http://pablogott.videocdn.scaleengine.net/pablogott-iphone/play/ooftv1/playlist.m3u8" rel="nofollow">http://pablogott.videocdn.scaleengine.net/pablogott-iphone/play/ooftv1/playlist.m3u8</a></p>
  
  <p><strong>Symptoms:</strong> In iOS/Android, first the audio drops out and the video keeps playing. Then the video may drop out. Eventually this gets worse.</p>
  
  <p>What I've tried: I have lowered the bit rate in my encoder and upgraded the hardware. I've done a speedtest and ping test to verify that bandwidth isn't an issue. I've also verified my encoder logs to make sure that my stream is flowing smoothly. I have also experimented with CBR vs VBR with no change in result.</p>
  
  <p>My CDN is scaleengine. </p>
  
  <p>Since the web browser plays back fine, it seems to be an issue that doesn't get picked up by a flash player, only the iOS player. </p>