本文實例講述了JS實現調用本地攝像頭功能。分享給大家供大家參考，具體如下：
今天學習了一下js調用本地攝像頭，其實是實現不是很麻煩，下面是代碼部分，連接上Tomcat服務器，然后再到網頁上打開即可以看到效果了。?？靵硗嬉幌掳桑?/p>
<!doctype html><html lang="en"><head><meta charset="utf-8" /><title></title><style>video { border: 1px solid #ccc; display: block; margin: 0 0 20px 0; float:left;}canvas { margin-top: 20px; border: 1px solid #ccc; display: block;}</style></head><body><video width="640" height="480" id="myVideo"></video><canvas width="640" height="480" id="myCanvas"></canvas><button id="myButton">截圖</button><button id="myButton2">預覽</button><button id="myButton3"><a download="video.png">另存為</a></button></body><script>window.addEventListener('DOMContentLoaded',function(){var cobj=document.getElementById('myCanvas').getContext('2d');var vobj=document.getElementById('myVideo');getUserMedia({video:true},function(stream){vobj.src=stream;vobj.play();},function(){});document.getElementById('myButton').addEventListener('click',function(){cobj.drawImage(vobj,0,0,640,480);document.getElementById('myButton3').children[0].href=cobj.canvas.toDataURL("image/png");},false);document.getElementById('myButton2').addEventListener('click',function(){window.open(cobj.canvas.toDataURL("image/png"),'_blank');},false);},false);function getUserMedia(obj,success,error){if(navigator.getUserMedia){getUserMedia=function(obj,success,error){navigator.getUserMedia(obj,function(stream){success(stream);},error);}}else if(navigator.webkitGetUserMedia){getUserMedia=function(obj,success,error){navigator.webkitGetUserMedia(obj,function(stream){var _URL=window.URL || window.webkitURL;success(_URL.createObjectURL(stream));},error);}}else if(navigator.mozGetUserMedia){getUserMedia=function(obj,success,error){navigator.mozGetUserMedia(obj,function(stream){success(window.URL.createObjectURL(stream));},error);}}else{return false;}return getUserMedia(obj,success,error);}</script></html>希望本文所述對大家JavaScript程序設計有所幫助。
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