<html>
<body>
<video id="myVideo" width="320" height="240" controls>
<source src="movie.mp4" type="video/mp4">
<source src="movie.ogg" type="video/ogg">
您的浏览器不支持 video 标签。
</source></source></video><br>
<button onclick="getPlaySpeed()" type="button">播放速度为?</button>
<button onclick="setPlaySpeed()" type="button">设置视频快速播放</button>
<script>
var x = document.getElementById("myVideo");
function getPlaySpeed()
{
alert(x.playbackRate);
}
function setPlaySpeed()
{
x.playbackRate = 5;
}
</script>
</body>
</html>