commit

@@ -30,7 +30,7 @@
 </div>
 <script type='text/javascript' src={{url_for('static', filename='js/opencv.js')}}>
 <script type='text/javascript'>
-let video = document.getElementById('videoElement');
+var video = document.querySelector("#videoElement");
 if (navigator.mediaDevices.getUserMedia){
     navigator.mediaDevices.getUserMedia({ video: true })
 	.then(function (stream) {
@@ -41,6 +41,7 @@ if (navigator.mediaDevices.getUserMedia){
 }
 </script>
 <script>
+    let video = document.getElementById('videoElement');
     let src = new cv.Mat(video.height, video.width, cv.CV_8UC4);
     let dst = new cv.Mat(video.height, video.width, cv.CV_8UC4);
     let gray = new cv.Mat();
@@ -81,8 +82,9 @@ if (navigator.mediaDevices.getUserMedia){
             utils.printError(err);
         }
     };
-    // schedule the first one.
-    setTimeout(processVideo, 0);
+
+// schedule the first one.
+setTimeout(processVideo, 0);
 </script>
 </body>
 </html>