CodeTV.GraphBuilderBase.AddAndConnectNullRendererForWPF C# (CSharp) Метод

        protected void AddAndConnectNullRendererForWPF()
        {
            if (useWPF)
            {
                // In order to keep the audio/video synchro, we need the NullRenderer
                IBaseFilter nullRenderer = new NullRenderer() as IBaseFilter;
                int hr = graphBuilder.AddFilter(nullRenderer, "NullRenderer");
                ThrowExceptionForHR("Adding the NullRenderer: ", hr);

                IPin pinOutFromFilterOut = DsFindPin.ByDirection(this.videoRenderer, PinDirection.Output, 0);
                if (pinOutFromFilterOut != null)
                {
                    try
                    {
                        IPin pinInFromFilterOut = DsFindPin.ByDirection(nullRenderer, PinDirection.Input, 0);
                        if (pinInFromFilterOut != null)
                        {
                            try
                            {
                                hr = this.graphBuilder.Connect(pinOutFromFilterOut, pinInFromFilterOut);
                            }
                            finally
                            {
                                Marshal.ReleaseComObject(pinInFromFilterOut);
                            }
                        }
                    }
                    finally
                    {
                        Marshal.ReleaseComObject(pinOutFromFilterOut);
                    }
                }

                //IPin pinOutFromFilterOut = DsFindPin.ByDirection(this.videoRenderer, PinDirection.Output, 0);
                //if (pinOutFromFilterOut != null)
                //{
                //    hr = this.graphBuilder.Render(pinOutFromFilterOut);
                //    Marshal.ReleaseComObject(pinOutFromFilterOut);
                //}
            }
        }