<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>
<p>点击按钮添加新的文本轨道。</p>
<button onclick="myFunction()">点我</button>
<p><strong>注意:</strong>所有主流浏览器都不支持 addTextTrack() 方法。</p>
<script>
var x = document.getElementById("myVideo");
function myFunction()
{
var y = x.addTextTrack("caption");
y.addCue(new TextTrackCue("Test text", 01.000, 04.000,"","","",true));
}
</script>
</body>
</html>