Видеозахват с ТВ тюнера (аппаратное сжатие)

public void InitGraph() 
        { 
                  //Create the Graph 
   graphBuilder = (IGraphBuilder) new FilterGraph(); 
          
   //Create the Capture Graph Builder 
   ICaptureGraphBuilder2 captureGraphBuilder = null; 
   captureGraphBuilder = (ICaptureGraphBuilder2) new CaptureGraphBuilder2(); 
          
   //Create the media control for controlling the graph 
   mediaControl = (IMediaControl) this.graphBuilder; 

   // Attach the filter graph to the capture graph 
   int hr = captureGraphBuilder.SetFiltergraph(this.graphBuilder); 
   DsError.ThrowExceptionForHR(hr); 

   //Add the Video input device to the graph 
            hr = graphBuilder.AddFilter(theDevice, "Video filter"); 
   //DsError.ThrowExceptionForHR(hr); 
            hr = graphBuilder.AddFilter(theDeviceA, "Audio filter"); 
   //Add the Video compressor filter to the graph 
            hr = graphBuilder.AddFilter(theCompressor, "Video compressor"); 
            
            hr = graphBuilder.AddFilter(theCompressorA, "Audio compressor"); 
            DsError.ThrowExceptionForHR(hr); 

   //Create the file writer part of the graph. SetOutputFileName does this for us, and returns the mux and sink 
   IBaseFilter mux; 
   IFileSinkFilter sink; 
   hr = captureGraphBuilder.SetOutputFileName(MediaSubType.Avi, textBox1.Text, out mux, out sink); 
   DsError.ThrowExceptionForHR(hr); 

   //Render any preview pin of the device 
            hr = captureGraphBuilder.RenderStream(PinCategory.Preview, MediaType.Video, theDevice, null, null); 
            hr = captureGraphBuilder.RenderStream(PinCategory.Preview, MediaType.Audio, theDevice, null, null); 

            DsError.ThrowExceptionForHR(hr); 
   //Connect the device and compressor to the mux to render the capture part of the graph 
            hr = captureGraphBuilder.RenderStream(PinCategory.Capture, MediaType.Video, theDevice, theCompressor, mux); 
            hr = captureGraphBuilder.RenderStream(PinCategory.Capture, MediaType.Audio, theDeviceA, theCompressor, mux); 
            //DsError.ThrowExceptionForHR(hr); 

#if DEBUG 
m_rot = new DsROTEntry(graphBuilder); 
#endif 
ДАЛЕЕ ВЫВОЖУ ВИДЕО НА ФОРМУ 
                  DsError.ThrowExceptionForHR(hr); 

   Marshal.ReleaseComObject(mux); 
   Marshal.ReleaseComObject(sink); 
           Marshal.ReleaseComObject(captureGraphBuilder); 
      }