Accord.Video.DirectShow.VideoCaptureDevice.GetPinCapabilitiesAndConfigureSizeAndRate C# (CSharp) Method

        private void GetPinCapabilitiesAndConfigureSizeAndRate(ICaptureGraphBuilder2 graphBuilder, IBaseFilter baseFilter,
            Guid pinCategory, VideoCapabilities resolutionToSet, ref VideoCapabilities[] capabilities)
        {
            object streamConfigObject;
            graphBuilder.FindInterface(pinCategory, MediaType.Video, baseFilter, typeof(IAMStreamConfig).GUID, out streamConfigObject);

            if (streamConfigObject != null)
            {
                IAMStreamConfig streamConfig = null;

                try
                {
                    streamConfig = (IAMStreamConfig)streamConfigObject;
                }
                catch (InvalidCastException)
                {
                }

                if (streamConfig != null)
                {
                    if (capabilities == null)
                    {
                        try
                        {
                            // get all video capabilities
                            capabilities = Accord.Video.DirectShow.VideoCapabilities.FromStreamConfig(streamConfig);
                        }
                        catch
                        {
                        }
                    }

                    // check if it is required to change capture settings
                    if (resolutionToSet != null)
                    {
                        SetResolution(streamConfig, resolutionToSet);
                    }
                }

                Marshal.ReleaseComObject(streamConfigObject);
            }

            // if failed resolving capabilities, then just create empty capabilities array,
            // so we don't try again
            if (capabilities == null)
            {
                capabilities = new VideoCapabilities[0];
            }
        }