diff --git a/src/plugins_experimental/filter_ouput_optical_flow/OOCRaster.h b/src/plugins_experimental/filter_ouput_optical_flow/OOCRaster.h
index ba39d3521..e8a658592 100644
--- a/src/plugins_experimental/filter_ouput_optical_flow/OOCRaster.h
+++ b/src/plugins_experimental/filter_ouput_optical_flow/OOCRaster.h
@@ -54,7 +54,7 @@ public:
     inline OOCRaster( RasterModel *r ) :
         nbBind(0),
         isOOC(false),
-        imgFilename(QString()),
+		imgFilename(r->currentPlane->shortName()),
         plane(r->currentPlane),
         shot(r->shot),
         id(r->id())
diff --git a/src/plugins_experimental/filter_ouput_optical_flow/filter_output_optical_flow.cpp b/src/plugins_experimental/filter_ouput_optical_flow/filter_output_optical_flow.cpp
index 6775998b6..4a18459fa 100644
--- a/src/plugins_experimental/filter_ouput_optical_flow/filter_output_optical_flow.cpp
+++ b/src/plugins_experimental/filter_ouput_optical_flow/filter_output_optical_flow.cpp
@@ -317,7 +317,7 @@ void FilterOutputOpticalFlowPlugin::saveXMLProject( const QString &filename,
                 << std::endl;
 
         vcg::Matrix44f rot = shot.Extrinsics.Rot();
-        vcg::Point3f tra = shot.Extrinsics.Tra();
+        vcg::Point3f tra = -shot.Extrinsics.Tra();
 
         xmlFile << "  <CamParam SimRot=\"";
         for( int i=0; i<4; ++i )