我想用html来调用摄像头拍照，IE浏览器阻止其操作，大神们

帮帮忙！！！我想用html来调用摄像头拍照，但是IE浏览器阻止其继续操作，求大神们解答

微软系浏览器除了最新的的Microsoft Edge，不支持getUserMedia。
如果限定在IE中实现，可以使用第三方插件。
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<!DOCTYPE html>

HTML5 GetUserMedia Demo

<script type="text/javascript">  
    var video = document.querySelector('video');  
    var audio, audioType;  

    var canvas1 = document.getElementById('canvas1');  
    var context1 = canvas1.getContext('2d');  

    var canvas2 = document.getElementById('canvas2');  
    var context2 = canvas2.getContext('2d');  

    navigator.getUserMedia = navigator.getUserMedia || navigator.webkitGetUserMedia || navigator.mozGetUserMedia || navigator.msGetUserMedia;  
    window.URL = window.URL || window.webkitURL || window.mozURL || window.msURL;  

    var exArray = []; //存储设备源ID  
    MediaStreamTrack.getSources(function (sourceInfos) {  
        for (var i = 0; i != sourceInfos.length; ++i) {  
            var sourceInfo = sourceInfos[i];  
            //这里会遍历audio,video，所以要加以区分  
            if (sourceInfo.kind === 'video') {  
                exArray.push(sourceInfo.id);  
            }  
        }  
    });  

    function getMedia() {  
        if (navigator.getUserMedia) {  
            navigator.getUserMedia({  
                'video': {  
                    'optional': [{  
                        'sourceId': exArray[1] //0为前置摄像头，1为后置  
                    }]  
                },  
                'audio':true  
            }, successFunc, errorFunc);    //success是获取成功的回调函数  
        }  
        else {  
            alert('Native device media streaming (getUserMedia) not supported in this browser.');  
        }  
    }  

    function successFunc(stream) {  
        //alert('Succeed to get media!');  
        if (video.mozSrcObject !== undefined) {  
            //Firefox中，video.mozSrcObject最初为null，而不是未定义的，我们可以靠这个来检测Firefox的支持  
            video.mozSrcObject = stream;  
        }  
        else {  
            video.src = window.URL && window.URL.createObjectURL(stream) || stream;  
        }  

        //video.play();  

        // 音频  
        audio = new Audio();  
        audioType = getAudioType(audio);  
        if (audioType) {  
            audio.src = 'polaroid.' + audioType;  
            audio.play();  
        }  
    }  
    function errorFunc(e) {  
        alert('Error！'+e);  
    }  


    // 将视频帧绘制到Canvas对象上,Canvas每60ms切换帧，形成肉眼视频效果  
    function drawVideoAtCanvas(video,context) {  
        window.setInterval(function () {  
            context.drawImage(video, 0, 0,90,120);  
        }, 60);  
    }  

    //获取音频格式  
    function getAudioType(element) {  
        if (element.canPlayType) {  
            if (element.canPlayType('audio/mp4; codecs="mp4a.40.5"') !== '') {  
                return ('aac');  
            } else if (element.canPlayType('audio/ogg; codecs="vorbis"') !== '') {  
                return ("ogg");  
            }  
        }  
        return false;  
    }  

    // vedio播放时触发，绘制vedio帧图像到canvas

// video.addEventListener('play', function () {

// drawVideoAtCanvas(video, context2);

// }, false);

    //拍照  
    function getPhoto() {  
        context1.drawImage(video, 0, 0,90,120); //将video对象内指定的区域捕捉绘制到画布上指定的区域，实现拍照。  
    }  

    //视频  
    function getVedio() {  
        drawVideoAtCanvas(video, context2);  
    }  

</script>