diff --git a/SofaGLFW/CMakeLists.txt b/SofaGLFW/CMakeLists.txt
index 695bb3f938..a8368a7458 100644
--- a/SofaGLFW/CMakeLists.txt
+++ b/SofaGLFW/CMakeLists.txt
@@ -104,9 +104,19 @@ configure_file(${CMAKE_CURRENT_SOURCE_DIR}/etc/${PROJECT_NAME}.ini.in "${CMAKE_B
 
 #### For install tree
 get_filename_component(FFMPEG_EXEC_FILENAME "${FFMPEG_EXEC_FILE}" NAME)
-set(FFMPEG_EXEC_PATH "../bin/${FFMPEG_EXEC_FILENAME}") # relative path for install dir, see .ini file
+if(FFMPEG_EXEC_FILENAME)
+    set(FFMPEG_EXEC_PATH "../bin/${FFMPEG_EXEC_FILENAME}")
+else()
+    #If ffmpeg hasn't been found, it'll not be shipped but we still want to offer the possibility for the user to use it
+    #easily by putting the executable alongside runSofa
+    set(FFMPEG_EXEC_PATH "../bin/ffmpeg")
+    if(WIN32)
+        set(FFMPEG_EXEC_PATH "${FFMPEG_EXEC_PATH}.exe")
+    endif()
+endif()
 configure_file(${CMAKE_CURRENT_SOURCE_DIR}/etc/${PROJECT_NAME}.ini.in "${CMAKE_BINARY_DIR}/etc/installed${PROJECT_NAME}.ini")
-install(FILES "${CMAKE_BINARY_DIR}/etc/installed${PROJECT_NAME}.ini" DESTINATION ${CMAKE_INSTALL_PREFIX}/etc  RENAME ${PROJECT_NAME}.ini COMPONENT applications)
+#Hack relative tree to ../../etc because of Windows:NSIS that doesn't allow absolute install path.  
+install(FILES "${CMAKE_BINARY_DIR}/etc/installed${PROJECT_NAME}.ini" DESTINATION ../../etc  RENAME ${PROJECT_NAME}.ini COMPONENT applications)
 
 
 
diff --git a/SofaGLFW/src/SofaGLFW/SofaGLFWBaseGUI.cpp b/SofaGLFW/src/SofaGLFW/SofaGLFWBaseGUI.cpp
index 56274d059b..4585ead12c 100644
--- a/SofaGLFW/src/SofaGLFW/SofaGLFWBaseGUI.cpp
+++ b/SofaGLFW/src/SofaGLFW/SofaGLFWBaseGUI.cpp
@@ -1228,8 +1228,8 @@ bool SofaGLFWBaseGUI::initRecorder(int width, int height, unsigned int framerate
     if (iniFileValues.find("FFMPEG_EXEC_PATH") != iniFileValues.end())
     {
         // get absolute path of FFMPEG executable
-        msg_info("SofaGLFWBaseGUI") << " The file " << ffmpegIniFilePath << " points to " << ffmpeg_exec_path << " for the ffmpeg executable.";
         ffmpeg_exec_path = sofa::helper::system::SetDirectory::GetRelativeFromProcess(iniFileValues["FFMPEG_EXEC_PATH"].c_str());
+        msg_info("SofaGLFWBaseGUI") << " The file " << ffmpegIniFilePath << " points to " << ffmpeg_exec_path << " for the ffmpeg executable.";
     }
     else
     {