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h5页面如何调用摄像头代码分享

程序员文章站 2022-04-11 21:37:27
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<input type="button" value="OpenVideo" id="btnOpenVideo" /><input type="button" value="TakePicture" id="btnTakePicture" /><input type="button" value="CloseVideo" id="btnCloseVideo" /><br /><video style="width:500px;height:500px;border:1px solid #000000;" id="videoTest"></video><canvas style="width:500px;height:500px;border:1px solid #000000;" id="canvasTest"></canvas><script type="text/javascript">  window.onload = function () {
    let btnOpenVideo = document.getElementById('btnOpenVideo');
    let btnTakePicture = document.getElementById('btnTakePicture');
    let btnCloseVideo = document.getElementById('btnCloseVideo');
    let video = document.getElementById('videoTest');
    let canvas = document.getElementById('canvasTest').getContext('2d');
    btnOpenVideo.onclick = function () {
      window.navigator.getUserMedia({
        video: true/*视频/摄像头*/
        /*audio:true*//*音频/麦克风*/
      }, function (param) {         video.src = window.URL.createObjectURL(param);/*设置video控件路径,实时显示摄像头的图像*/        btnCloseVideo.onclick = function () {/*关闭摄像头*/          if (param.getTracks())/*Chrome*/            param.getTracks()[0].stop();           else            param.stop();         };         btnTakePicture.onclick = function () {/*拍照*/          canvas.drawImage(document.getElementById('videoTest'), 0, 0, 500, 500);/*将拍摄的照片画到canvas中*/        };       }, function (err) {         alert(err);       });     };   };</script>

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