private void OnVideoRenderingSurfaceReady(object sender, AndroidVideoWindowListenerArgs e)
 {
     captureCamera = e.surfaceView as Org.Linphone.Mediastream.Video.Display.GL2JNIView;
     if (LinphoneEngineAndroid.Instance.LinphoneCore.NativeVideoWindowId == IntPtr.Zero)
     {
         captureCamera = e.surfaceView as Org.Linphone.Mediastream.Video.Display.GL2JNIView;
         LinphoneEngineAndroid.Instance.LinphoneCore.NativeVideoWindowId = e.androidVideoWindowImpl.Handle;
     }
 }
 private void OnVideoRenderingSurfaceDestroyed(object sender, AndroidVideoWindowListenerArgs e)
 {
     androidView.Release();
     androidView.Dispose();
 }