decklink start up to separate factory

src/app/AppConfig.h

@@ -28,6 +28,8 @@ struct AppConfig
 	std::string inputFrameRate = "59.94";
 	std::string outputVideoFormat = "1080p";
 	std::string outputFrameRate = "59.94";
+	std::string videoInputBackend = "decklink";
+	std::string videoOutputBackend = "decklink";
 	bool autoReload = true;
 	std::size_t maxTemporalHistoryFrames = 12;
 	bool previewEnabled = false;