private void labelQuality_MouseUp(object sender, MouseButtonEventArgs e)
{
if (this.AVSession != null && this.AVSession.IsActive)
{
if (this.qosWindow == null)
{
this.qosWindow = new QoSWindow();
this.qosWindow.Info = this.AVSession.GetVideoQualityInfo();
}
this.qosWindow.Show();
}
}