将视频设置为慢速播放 - 在线编辑器

          <!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
</head>
<body>

  <button onclick="getPlaySpeed()" type="button">回放的速度是多少？</button>
  <button onclick="setPlaySpeed()" type="button">视频设置为慢速播放</button>
  <br>
  <video id="video1" controls="controls">
  <source src="/examples/mov_bbb.mp4" type="video/mp4">
  <source src="/examples/mov_bbb.ogg" type="video/ogg">
  您的浏览器不支持 HTML5 video  标签。
</video>

  <script>
    myVid = document.getElementById("video1");

    function getPlaySpeed() {
      alert(myVid.playbackRate);
    }

    function setPlaySpeed() {
      myVid.playbackRate = 0.5;
    }
  </script>

  <p>Video courtesy of <a href="http://www.bigbuckbunny.org/" target="_blank">Big Buck Bunny</a>.</p>

</body>
</html>
        