diff --git a/libsrc/grabber/video/EncoderThread.cpp b/libsrc/grabber/video/EncoderThread.cpp
index e891c821..79aa1e38 100644
--- a/libsrc/grabber/video/EncoderThread.cpp
+++ b/libsrc/grabber/video/EncoderThread.cpp
@@ -131,7 +131,7 @@ void EncoderThread::process()
 #if defined(ENABLE_V4L2)
 				_pixelFormat,
 #else
-				PixelFormat::BGR24,
+				PixelFormat::BGR24,  // MF-Grabber always sends RGB24, but memory layout is RGBTRIPLE (b,g,r) -> process as BGR24
 #endif
 				image
 			);
diff --git a/libsrc/grabber/video/mediafoundation/MFSourceReaderCB.h b/libsrc/grabber/video/mediafoundation/MFSourceReaderCB.h
index a4c7f82b..f172a8f3 100644
--- a/libsrc/grabber/video/mediafoundation/MFSourceReaderCB.h
+++ b/libsrc/grabber/video/mediafoundation/MFSourceReaderCB.h
@@ -149,7 +149,7 @@ public:
 #else
 		if (_pixelformat != PixelFormat::RGB24 && _pixelformat != PixelFormat::NO_CHANGE)
 #endif
-			pSample = TransformSample(_transform, pSample);
+			pSample = TransformSample(_transform, pSample); // forced conversion to RGB24, but memory layout is RGBTRIPLE (b,g,r) -> process as BGR24
 
 		_hrStatus = pSample->ConvertToContiguousBuffer(&buffer);
 		if (FAILED(_hrStatus))