diff --git a/gui/OpenFaceOffline/MainWindow.xaml.cs b/gui/OpenFaceOffline/MainWindow.xaml.cs
index 84d3a2a..e63d6a8 100644
--- a/gui/OpenFaceOffline/MainWindow.xaml.cs
+++ b/gui/OpenFaceOffline/MainWindow.xaml.cs
@@ -318,6 +318,7 @@ namespace OpenFaceOffline
                 // Do not cary state accross images
                 clnf_model.Reset();
                 face_analyser.Reset();
+                recorder.Close();
 
                 // TODO how to report errors from the reader here? exceptions? logging? Problem for future versions?
             }
diff --git a/lib/local/CppInerop/RecorderInterop.h b/lib/local/CppInerop/RecorderInterop.h
index aa4ce46..858f09c 100644
--- a/lib/local/CppInerop/RecorderInterop.h
+++ b/lib/local/CppInerop/RecorderInterop.h
@@ -108,6 +108,11 @@ namespace UtilitiesOF {
 			m_recorder = new Utilities::RecorderOpenFace(in_filename_std, *parameters->GetParams(), output_directory_std);
 		}
 
+		void Close()
+		{
+			m_recorder->Close();
+		}
+
 		void WriteObservation()
 		{
 			m_recorder->WriteObservation();