private void RtpStream_FirstFrameReceived(object sender, EventArgs ea)
{
// It is safe to render the graph, because there is a frame available
if (sender == rtpStream)
{
// Creation of the fgm and the adding / removing of filters needs to happen on the
// same thread. So make sure it all happens on the UI thread.
Conference.FormInvoke(new System.Windows.Forms.MethodInvoker(_RtpStream_FirstFrameReceived), null);
}
}