private void SDK_OnVideoFrameBuffer(object sender, VideoFrameBufferEventArgs e) { if (!logoInitiated) { logoInitiated = true; InitTextLogo(); } MFP.AddTextLogo(null, e.Frame.Data, e.Frame.Width, e.Frame.Height, ref textLogo, e.Timestamp, 0); } private bool logoInitiated = false; private VideoEffectTextLogo textLogo = null; private void InitTextLogo() { textLogo = new VideoEffectTextLogo(true); textLogo.Text = "Hello world!"; textLogo.Left = 50; textLogo.Top = 50; }