Fixes the issue with black large video.

index.html

     <script src="libs/popover.js?v=1"></script><!-- bootstrap tooltip lib -->
     <script src="libs/toastr.js?v=1"></script><!-- notifications lib -->
     <script src="interface_config.js?v=5"></script>
-    <script src="libs/app.bundle.js?v=60"></script>
+    <script src="libs/app.bundle.js?v=61"></script>
     <script src="analytics.js?v=1"></script><!-- google analytics plugin -->
     <link rel="stylesheet" href="css/font.css?v=7"/>
     <link rel="stylesheet" href="css/toastr.css?v=1">

modules/xmpp/JingleSession.js

 
     this.hardMuteVideo(mute);
 
-    this.modifySourcesQueue.push(callback(mute));
+    var self = this;
+    var oldSdp = null;
+    if(self.peerconnection) {
+        if(self.peerconnection.localDescription) {
+            oldSdp = new SDP(self.peerconnection.localDescription.sdp);
+        }
+    }
+
+    this.modifySourcesQueue.push(function() {
+        console.log('modify sources done');
+
+        callback(mute);
+
+        var newSdp = new SDP(self.peerconnection.localDescription.sdp);
+        console.log("SDPs", oldSdp, newSdp);
+        self.notifyMySSRCUpdate(oldSdp, newSdp);
+    });
 };
 
 JingleSession.prototype.hardMuteVideo = function (muted) {