<!DOCTYPE html>
<html class="reftest-wait">
<head>
  <title> Bug 1368490 : Crash if media recorder source stream reduces number of channels. </title>
</head>
<meta charset="utf-8">
<script type="text/javascript">

function boom() {
  let audioContext = new window.AudioContext();
  let oscillator  = audioContext.createOscillator();
  let dst = audioContext.createMediaStreamDestination();
  oscillator.channelCount = 4;
  dst.channelCount = 4;
  oscillator.connect(dst, 0, 0);
  oscillator.start();
  mediaRec = new MediaRecorder(dst.stream);

  mediaRec.start(100);
  setTimeout(() => {
    dst.channelCount = 1;
    setTimeout(() => {
      mediaRec.stop();
      document.documentElement.removeAttribute("class");
    }, 100);
  }, 100);
}
</script>
<body onload="boom();"></body>
</html>
