private void ExportTo(string exportType)
        {
            var subtitles = GetSelectedSubtitles();

            if (subtitles == null)
            {
                return;
            }

            using (var formSubOcr = new VobSubOcr())
            {
                formSubOcr.Initialize(subtitles, Configuration.Settings.VobSubOcr, _fileName, GetSelectedLanguage());
                using (var exportBdnXmlPng = new ExportPngXml())
                {
                    exportBdnXmlPng.InitializeFromVobSubOcr(formSubOcr.SubtitleFromOcr, new SubRip(), exportType, _fileName, formSubOcr, GetSelectedLanguage());
                    exportBdnXmlPng.SetResolution(GetResolution());
                    exportBdnXmlPng.ShowDialog(this);
                }
            }
        }