<!DOCTYPE> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" > <script type="text/javascript" src="/js/jquery1.8.3.js"></script> <title>在线拍照</title> </head> <body> <video id="camVideo" width="400" height="328" autoplay></video> <br /> <button id="snap">抓图</button> <br /> <table> <tr> <td><canvas id="canvas" width="400" height="328" /></td><td><input name="imgData" id="imgData" style="600px"/></td> </tr> </table> <script> $(function(){ // 获取元素，创建配置 var canvas = document.getElementById("canvas"); var context = canvas.getContext("2d"); var video = document.getElementById("camVideo"); var videoObj = { "video": true }; var errBack = function(error) { console.log("Video capture error: ", error.code); }; // 添加视频监听器 if(navigator.getUserMedia) { // 标准的API navigator.getUserMedia(videoObj, function(stream) { video.src = stream; video.play(); }, errBack); } else if(navigator.webkitGetUserMedia) { // WebKit 核心的API 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); } document.getElementById("snap").addEventListener("click", function() { context.drawImage(video, 0, 0, 400, 328); var dataUrl = context.canvas.toDataURL("image/png"); $( "#imgData" ).val( dataUrl ); }); }); </script> </body> </html>