mozilla-release/dom/media/mediasource/test/test_Sequence_mp4.html

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<meta http-equiv="content-type" content="text/html; charset=windows-1252">
  <title>MSE: Don't get stuck buffering for too long when we have frames to show</title>
  <script src="/tests/SimpleTest/SimpleTest.js"></script>
  <script type="text/javascript" src="mediasource.js"></script>
  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
</head>
<body>
<pre id="test"><script class="testbody" type="text/javascript">

SimpleTest.waitForExplicitFinish();

runWithMSE(async (ms, v) => {
  await once(ms, "sourceopen");
  ok(true, "Receive a sourceopen event");
  ms.addEventListener("sourceopen", () => ok(false, "No more sourceopen"));
  const sb = ms.addSourceBuffer("video/mp4");
  ok(sb, "Create a SourceBuffer");
  sb.addEventListener("error", e => {
    ok(false, "Got Error: " + e);
    SimpleTest.finish();
  });
  sb.mode = "sequence";

  await fetchAndLoad(sb, "bipbop/bipbop_video", ["init"], ".mp4");
  await fetchAndLoad(sb, "bipbop/bipbop_video", ["5"], ".m4s");
  await fetchAndLoad(sb, "bipbop/bipbop_video", ["2"], ".m4s");
  is(v.buffered.length, 1, "Continuous buffered range");
  is(v.buffered.start(0), 0, "Buffered range starts at 0");
  ok(sb.timestampOffset > 0, "SourceBuffer.timestampOffset set to allow continuous range");
  SimpleTest.finish();
});
</script>
</pre>
</body>
</html>