<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(&#39;btnOpenVideo&#39;);
let btnTakePicture = document.getElementById(&#39;btnTakePicture&#39;);
let btnCloseVideo = document.getElementById(&#39;btnCloseVideo&#39;);
let video = document.getElementById(&#39;videoTest&#39;);
let canvas = document.getElementById(&#39;canvasTest&#39;).getContext(&#39;2d&#39;);
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(&#39;videoTest&#39;), 0, 0, 500, 500);/*将拍摄的照片画到canvas中*/ };
}, function (err) {
alert(err);
});
};
};script>