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HTML5实现在线抓拍

<!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="width: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>

 

HTML5实现在线抓拍