Accord.Video.DirectShow.VideoCapabilities.FromStreamConfig C# (CSharp) Method

        static internal VideoCapabilities[] FromStreamConfig(IAMStreamConfig videoStreamConfig)
        {
            if (videoStreamConfig == null)
                throw new ArgumentNullException("videoStreamConfig");

            // ensure this device reports capabilities
            int count, size;
            int hr = videoStreamConfig.GetNumberOfCapabilities(out count, out size);

            if (hr != 0)
                Marshal.ThrowExceptionForHR(hr);

            if (count <= 0)
                throw new NotSupportedException("This video device does not report capabilities.");

            if (size > Marshal.SizeOf(typeof(VideoStreamConfigCaps)))
                throw new NotSupportedException("Unable to retrieve video device capabilities. This video device requires a larger VideoStreamConfigCaps structure.");

            // group capabilities with similar parameters
            Dictionary<uint, VideoCapabilities> videocapsList = new Dictionary<uint, VideoCapabilities>();

            for (int i = 0; i < count; i++)
            {
                try
                {
                    VideoCapabilities vc = new VideoCapabilities(videoStreamConfig, i);

                    uint key = (((uint)vc.FrameSize.Height) << 32) |
                               (((uint)vc.FrameSize.Width) << 16);

                    if (!videocapsList.ContainsKey(key))
                    {
                        videocapsList.Add(key, vc);
                    }
                    else
                    {
                        if (vc.BitCount > videocapsList[key].BitCount)
                        {
                            videocapsList[key] = vc;
                        }
                    }
                }
                catch
                {
                }
            }

            VideoCapabilities[] videocaps = new VideoCapabilities[videocapsList.Count];
            videocapsList.Values.CopyTo(videocaps, 0);

            return videocaps;
        }