<video id="myVideo" width="320" height="240" controls>

    <source src="/static/i/html/html_video_1.mp4" type="video/mp4">

    <source src="/static/i/html/html_video_1.ogg" type="video/ogg">

    您的浏览器不支持 video 标签。

</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>

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