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源代码：
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<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>安科教程(www.ancii.com)</title> </head> <body> <p>要使用的视频:</p> <video id="video1" controls width="270" autoplay> <source src="/statics/demosource/mov_bbb.mp4" type='video/mp4'> <source src="/statics/demosource/mov_bbb.ogg" type='video/ogg'> <source src="mov_bbb.webm" type='video/webm'> </video> <p>画布 (代码在每20毫秒绘制当前的视频帧):</p> <canvas id="myCanvas" width="270" height="135" style="border:1px solid #d3d3d3;"> 您的浏览器不支持 HTML5 canvas 标签。 </canvas> <script> var v=document.getElementById("video1"); var c=document.getElementById("myCanvas"); ctx=c.getContext('2d'); v.addEventListener('play', function() {var i=window.setInterval(function() {ctx.drawImage(v,5,5,260,125)},20);},false); v.addEventListener('pause',function() {window.clearInterval(i);},false); v.addEventListener('ended',function() {clearInterval(i);},false); </script> </body> </html>
运行结果
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