html5调取摄像头

话不多说，直接贴代码。

温馨提示：这个代码 必须放在服务器环境中才可以运行，你可以在本地配个虚拟的服务器。

代码如下：

<video id="video" autoplay=""style='width:640px;height:480px'></video>
<div><button id='picture' style="width: 100%;">拍照</button></div>
<canvas id="canvas" width="640" height="480"></canvas>
<img src="" id="img" width="64" height="48">

<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);
var dataUrl = canvas.toDataURL();
document.getElementById("img").src = dataUrl;
});
</script>