<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="Generator" content="EditPlus?">
<meta name="Author" content="">
<meta name="Keywords" content="">
<meta name="Description" content="">
<title>Document</title>
</head>
<body>
<video id="video" src="t_1234567.mp4" width=50% autobuffer controls type="video/mp4"></video>
<p>选择播放速率：<select id="selRate">
<option value="0.5">0.5</option>
<option value="1" selected>1.0</option>
<option value="1.25">1.25</option>
<option value="1.5">1.5</option>
<option value="2">2.0</option>
<option value="5">5.0</option>
</select></p>
<p><button id="btnPlay">视频播放</button></p>
<script>
var eleSelect = document.getElementById(‘selRate‘);
var eleButton = document.getElementById(‘btnPlay‘);
// 视频元素
var video = document.getElementById(‘video‘);
// 改变播放速率
eleSelect.addEventListener(‘change‘, function () {
video.playbackRate = this.value;
});
// 点击播放按钮
eleButton.addEventListener(‘click‘, function () {
video.pause();
});
</script>
</body>
</html>
原文：https://www.cnblogs.com/alidydb/p/13052262.html