public static async Task Write(VideoSetting videoSetting)
        {
            var localFolder       = ApplicationData.Current.LocalFolder;
            var configurationFile = await localFolder.CreateFileAsync(CONFIGURATION_FILE_NAME, CreationCollisionOption.OpenIfExists);

            var configuration = new JsonObject
            {
                { "VideoResolution", JsonValue.CreateNumberValue((int)videoSetting.VideoResolution) },
                { "VideoSubtype", JsonValue.CreateStringValue(VideoSubtypeHelper.Get(videoSetting.VideoSubtype)) },
                { "VideoQuality", JsonValue.CreateNumberValue(videoSetting.VideoQuality) },
                { "UsedThreads", JsonValue.CreateNumberValue(videoSetting.UsedThreads) }
            };

            VideoSetting = configuration;

            await FileIO.WriteTextAsync(configurationFile, configuration.Stringify());
        }
        public static async Task <VideoSetting> Read(List <MediaFrameFormat> mediaFrameFormats)
        {
            VideoSetting videoSetting            = null;
            JsonObject   configuration           = null;
            var          configurationFileExists = await ApplicationData.Current.LocalFolder.TryGetItemAsync(CONFIGURATION_FILE_NAME);

            if (configurationFileExists != null)
            {
                var configurationFile = await ApplicationData.Current.LocalFolder.GetFileAsync(CONFIGURATION_FILE_NAME);

                configuration = JsonObject.Parse(await FileIO.ReadTextAsync(configurationFile));
            }

            if (configuration != null)
            {
                var videoResolution            = (VideoResolution)configuration["VideoResolution"].GetNumber();
                var videoResolutionWidthHeight = VideoResolutionWidthHeight.Get(videoResolution);

                var videoSubType = configuration["VideoSubtype"].GetString();
                var videoQuality = configuration["VideoQuality"].GetNumber();
                var usedThreads  = configuration["UsedThreads"].GetNumber();

                var mediaFrameFormat = mediaFrameFormats.Where(m => m.Subtype == videoSubType &&
                                                               m.VideoFormat.Width == videoResolutionWidthHeight.Width &&
                                                               m.VideoFormat.Height == videoResolutionWidthHeight.Height)
                                       .OrderByDescending(m => m.FrameRate.Numerator / m.FrameRate.Denominator)
                                       .FirstOrDefault();
                if (mediaFrameFormat != null)
                {
                    videoSetting = new VideoSetting
                    {
                        VideoResolution = videoResolution,
                        VideoSubtype    = VideoSubtypeHelper.Get(videoSubType),
                        VideoQuality    = videoQuality,
                        UsedThreads     = (int)usedThreads
                    };
                }
            }
            else
            {
                for (int videoSubType = 0; videoSubType <= 2; videoSubType++)
                {
                    if (videoSetting != null)
                    {
                        break;
                    }

                    for (int videoResolutionId = 4; videoResolutionId >= 0; videoResolutionId--)
                    {
                        var videoResolutionLowWidthHeight = VideoResolutionWidthHeight.Get((VideoResolution)videoResolutionId);

                        var mediaFrameFormat = mediaFrameFormats.Where(m => m.Subtype == VideoSubtypeHelper.Get((VideoSubtype)videoSubType) &&
                                                                       m.VideoFormat.Width == videoResolutionLowWidthHeight.Width &&
                                                                       m.VideoFormat.Height == videoResolutionLowWidthHeight.Height)
                                               .OrderByDescending(m => m.FrameRate.Numerator / m.FrameRate.Denominator)
                                               .FirstOrDefault();

                        if (mediaFrameFormat != null)
                        {
                            videoSetting = new VideoSetting
                            {
                                VideoResolution = VideoResolution.SD640_480,
                                VideoSubtype    = (VideoSubtype)videoSubType,
                                VideoQuality    = 0.6,
                                UsedThreads     = 1
                            };

                            break;
                        }
                    }
                }
            }

            if (videoSetting != null)
            {
                VideoSetting = new JsonObject
                {
                    { "VideoResolution", JsonValue.CreateNumberValue((int)videoSetting.VideoResolution) },
                    { "VideoSubtype", JsonValue.CreateStringValue(VideoSubtypeHelper.Get(videoSetting.VideoSubtype)) },
                    { "VideoQuality", JsonValue.CreateNumberValue(videoSetting.VideoQuality) },
                    { "UsedThreads", JsonValue.CreateNumberValue(videoSetting.UsedThreads) }
                };

                return(videoSetting);
            }
            else
            {
                throw new Exception("Webcam not supported. Could not found correct video resolution and subtype. Please change code.");
            }
        }