使用HTML５中的canvas和video技術實現調用PC攝像頭

1.[代碼][HTML]代碼

HTML5調用電腦攝像頭實例

window.addEventListener("DOMContentLoaded", function() {

// Grab elements, create settings, etc.

var canvas = document.getElementById("canvas"),

context = canvas.getContext("2d"),

video = document.getElementById("video"),

videoObj = { "video": true },

errBack = function(error) {

console.log("Video capture error: ", error.code);

};

// Put video listeners into place

if(navigator.getUserMedia) { // Standard

//alert("支持navigator.getUserMedia");

navigator.getUserMedia(videoObj, function(stream) {

video.src = stream;

video.play();

}, errBack);

} else if(navigator.webkitGetUserMedia) { // WebKit-prefixed

//alert("支持navigator.webkitGetUserMedia");

navigator.webkitGetUserMedia(videoObj, function(stream){

video.src = window.webkitURL.createObjectURL(stream);

video.play();

}, errBack);

}

else if(navigator.mozGetUserMedia) { // Firefox-prefixed

//alert("支持navigator.mozGetUserMedia");

navigator.mozGetUserMedia(videoObj, function(stream){

video.src = window.URL.createObjectURL(stream);

video.play();

}, errBack);

}

// 觸發拍照動作

document.getElementById("snap").addEventListener("click", function() {

context.drawImage(video, 0, 0, 640, 480);

});

}, false);

點擊拍照

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