问如何在DirectShow.Net中访问摄像头的电力线补偿和背光补偿设置

EN

            DsDevice[] capDevices;

            // Get the collection of video devices
            capDevices = 
                DsDevice.GetDevicesOfCat(FilterCategory.VideoInputDevice);

            // Select first camera
            var dev = capDevices[0];

            int hr;

            IBaseFilter capFilter = null;
            ICaptureGraphBuilder2 capGraph = null;

            // Get the graphbuilder object
            IFilterGraph2 m_FilterGraph = (IFilterGraph2)new FilterGraph();
            try
            {
                // Get the ICaptureGraphBuilder2
                capGraph = (ICaptureGraphBuilder2)new CaptureGraphBuilder2();

                /// Start building the graph
                hr = capGraph.SetFiltergraph(m_FilterGraph);
                DsError.ThrowExceptionForHR(hr);

                // Add the video device
                hr = m_FilterGraph.AddSourceFilterForMoniker(dev.Mon, null, "Video input", out capFilter);
                DsError.ThrowExceptionForHR(hr);

                int value;

                // Reset settings
                cameraSettings.Reset();

                // Get IAMVideoProcAmp Values
                IAMVideoProcAmp pVideoAmp = (IAMVideoProcAmp)capFilter;
                VideoProcAmpFlags vpaFlags;

                pVideoAmp.Get(VideoProcAmpProperty.Brightness, out value, out vpaFlags);

                .....

                // Get IAMCameraControl Values
                IAMCameraControl pCameraControl = (IAMCameraControl)capFilter;
                CameraControlFlags ccFlags;

                pCameraControl.Get(CameraControlProperty.Exposure, out value, out ccFlags);

                .....