<!DOCTYPE html>  
<html>  
<head>  
<meta charset="UTF-8">  
<title>Insert title here</title>  
</head>  
<body>  
<video id="video" autoplay=""style=\'width:640px;height:480px\'></video>  
<div><button id=\'picture\' style="width: 100%;">PICTURE</button></div>  
<canvas id="canvas" width="640" height="480"></canvas>  
<script type="text/javascript">  
var video = document.getElementById("video");  
var context = canvas.getContext("2d");  
var errocb = function () {  
    console.log(\'sth wrong!\');  
}  
  
if (navigator.getUserMedia) { // 标准的API  
    navigator.getUserMedia({ "video": true }, function (stream) {  
        video.src = stream;  
        video.play();  
    }, errocb);  
} else if (navigator.webkitGetUserMedia) { // WebKit 核心的API  
    navigator.webkitGetUserMedia({ "video": true }, function (stream) {  
        video.src = window.webkitURL.createObjectURL(stream);  
        video.play();  
    }, errocb);  
}  
  
document.getElementById("picture").addEventListener("click", function () {  
    context.drawImage(video, 0, 0, 640, 480);  
});  
</script>  
  
</body>  
</html>

 

 

来源——： http://blog.csdn.net/l30961171/article/details/46356549

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本文链接：https://www.cnblogs.com/yudishow/p/4736446.html