protected void on_connected_cb(IntPtr session, IntPtr userData)
 {
     pubCb = new Publisher.otc_publisher_cb();
     pubCb.on_render_frame = on_pub_render_frame;
     otcapturer            = Opentok.Android.VideoCapturer.otc_video_capturer_create();
     pub = Opentok.Publisher.otc_publisher_new("XAMARIN ANDROID", otcapturer, ref pubCb);
     Opentok.Session.otc_session_publish(sess, pub);
 }
 static void on_connected_cb(IntPtr session, IntPtr userData)
 {
     pubCb                 = new Opentok.Publisher.otc_publisher_cb();
     pubCb.userData        = userData;
     pubCb.on_render_frame = on_pub_render_frame;
     capturer              = Opentok.iOS.VideoCapturer.video_capturer_create(640, 480);
     pub = Opentok.Publisher.otc_publisher_new("C SDK XAMRARIN", capturer, ref pubCb);
     Opentok.Session.otc_session_publish(session, pub);
 }