【www.bbyears.com--html5教程】
html5新增了很多强大的API，其中可以获取设备的摄像头视频是个比较大的亮点，零度从网上找到了一些代码，进行了整合，搞出来一个html5获取摄像头的例子，大家可以参考一下。
HTML5获取摄像头视频演示
HTML5获取摄像头视频演示
<script>
window.addEventListener("DOMContentLoaded", function() {
var canvas = document.getElementById("canvas"),
context = canvas.getContext("2d"),
video = document.getElementById("video"),
videoObj = { "video": true },
errBack = function(error) {
console.log("视频获取失败: ", error.code);
};
if(navigator.getUserMedia) { // Standard
navigator.getUserMedia(videoObj, function(stream) {
video.src = stream;
video.play();
}, errBack);
} else if(navigator.webkitGetUserMedia) { // WebKit-prefixed
navigator.webkitGetUserMedia(videoObj, function(stream){
video.src = window.webkitURL.createObjectURL(stream);
video.play();
}, errBack);
} else if(navigator.mozGetUserMedia) { // WebKit-prefixed
navigator.mozGetUserMedia(videoObj, function(stream){
video.src = window.URL.createObjectURL(stream);
video.play();
}, errBack);
}
var clientW = document.documentElement.clientWidth*0.96;
document.getElementById("canvas").width = clientW;
document.getElementById("snap").addEventListener("click", function() {
context.drawImage(video, 0, 0, clientW, 480);
});
}, false);
</script>
主要代码如下：
window.addEventListener("DOMContentLoaded", function() {
var canvas = document.getElementById("canvas"),
context = canvas.getContext("2d"),
video = document.getElementById("video"),
videoObj = { "video": true },
errBack = function(error) {
console.log("视频获取失败: ", error.code);
};
if(navigator.getUserMedia) { // Standard
navigator.getUserMedia(videoObj, function(stream) {
video.src = stream;
video.play();
}, errBack);
} else if(navigator.webkitGetUserMedia) { // WebKit-prefixed
navigator.webkitGetUserMedia(videoObj, function(stream){
video.src = window.webkitURL.createObjectURL(stream);
video.play();
}, errBack);
} else if(navigator.mozGetUserMedia) { // moz-prefixed
navigator.mozGetUserMedia(videoObj, function(stream){
video.src = window.URL.createObjectURL(stream);
video.play();
}, errBack);
}
}, false);