html5＜canvas在画布上画视频和图片>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<style>
canvas{
background:#ccc;
}
</style>
<script>
window.onload = function(){
var canvas = document.getElementById('canvas');
var cobj = canvas.getContext('2d');//获取绘图环境
var img = document.getElementsByTagName('img')[0];
var video = document.getElementsByTagName('video')[0];
cobj.drawImage(img, 200, 200, 200, 200);//把图片画在画布上
canvas.onclick = function(){
video.play();
video.addEventListener('play', function(){
//画布上画视频，需要动态地获取它，一帧一帧地画出来
setInterval(function(){
cobj.drawImage(video, 0, 0, 200, 200);
}, 20);
});
}
}
</script>
</head>
<body>
<canvas id="canvas" width=600 height=600>
</canvas>
<img src="./images/01.jpg" hidden/>
<video src="./images/iceage4.mp4"></video>
</body>
<html lang="en">
<head>
<meta charset="utf-8">
<style>
canvas{
background:#ccc;
}
</style>
<script>
window.onload = function(){
var canvas = document.getElementById('canvas');
var cobj = canvas.getContext('2d');//获取绘图环境
var img = document.getElementsByTagName('img')[0];
var video = document.getElementsByTagName('video')[0];
cobj.drawImage(img, 200, 200, 200, 200);//把图片画在画布上
canvas.onclick = function(){
video.play();
video.addEventListener('play', function(){
//画布上画视频，需要动态地获取它，一帧一帧地画出来
setInterval(function(){
cobj.drawImage(video, 0, 0, 200, 200);
}, 20);
});
}
}
</script>
</head>
<body>
<canvas id="canvas" width=600 height=600>
</canvas>
<img src="./images/01.jpg" hidden/>
<video src="./images/iceage4.mp4"></video>
</body>
</html>