浏览器调用摄像头
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
</head>
<body>
<video width="200" height="150"></video>
<canvas width="200" height="150"></canvas>
<p>
<button id="snap">截取图像</button>
<button id="close">关闭摄像头</button>
<button id="upload">上传图像</button>
</p>
<img id="uploaded" width="200" height="150" />
<script type="text/javascript" src="js/jquery.min.js"></script>
<script type="text/javascript">
function $(elem) {
return document.querySelector(elem);
}
// 获取媒体方法（旧方法）
// 8 navigator.getMedia = navigator.getUserMedia || navigator.webkitGetUserMedia || navigator.mozGetUserMeddia || navigator.msGetUserMedia;
var canvas = $('canvas'),
context = canvas.getContext('2d'),
video = $('video'),
snap = $('#snap'),
close = $('#close'),
upload = $('#upload'),
uploaded = $('#uploaded'),
mediaStreamTrack;
// 获取媒体方法（新方法）
// 使用新方法打开摄像头
if (navigator.mediaDevices && navigator.mediaDevices.getUserMedia) {
navigator.mediaDevices.getUserMedia({
video: true,
audio: true
}).then(function(stream) {
console.log(stream);
mediaStreamTrack = typeof stream.stop === 'function' ? stream : stream.getTracks()[1];
video.src = (window.URL || window.webkitURL).createObjectURL(stream);
video.play();
}).catch(function(err) {
console.log(err);
})
}
// 使用旧方法打开摄像头
else if (navigator.getMedia) {
navigator.getMedia({
video: true
}, function(stream) {
mediaStreamTrack = stream.getTracks()[0];
video.src = (window.URL || window.webkitURL).createObjectURL(stream);
video.play();
}, function(err) {
console.log(err);
});
}
// 截取图像
snap.addEventListener('click', function() {
context.drawImage(video, 0, 0, 200, 150);
}, false);
// 关闭摄像头
close.addEventListener('click', function() {
mediaStreamTrack && mediaStreamTrack.stop();
}, false);
// 上传截取的图像
upload.addEventListener('click', function() {
jQuery.post('/uploadSnap.php', {
snapData: canvas.toDataURL('image/png')
}).done(function(rs) {
rs = JSON.parse(rs);
console.log(rs);
uploaded.src = rs.path;
}).fail(function(err) {
console.log(err);
});
}, false);
</script>
</body>
</html>
posted on 2017-08-21 14:49 taiyang2014 阅读(2876) 评论(0) 编辑 收藏 举报
