<!DOCTYPE HTML >
<html>
<head>
<title>cam.html</title>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
</head>
<body>
<video id="video" autoplay=""style='width:600px;height:400px'></video>
<button id='picture'>拍照</button>
<canvas id="canvas" width="600" height="400"></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, 600, 400);
});
</script>
</body>
</html>
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