时间:2021-07-01 10:21:17 帮助过:50人阅读
<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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