diff --git a/libavcodec/mpegvideo_enc.c b/libavcodec/mpegvideo_enc.c
index 488ec5140f..04be96759b 100644
--- a/libavcodec/mpegvideo_enc.c
+++ b/libavcodec/mpegvideo_enc.c
@@ -20,6 +20,8 @@
  * You should have received a copy of the GNU Lesser General Public
  * License along with FFmpeg; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * non linear quantizers with large QPs and VBV with restrictive qmin fixes sponsored by NOA GmbH
  */
 
 /**
diff --git a/libavformat/mxfenc.c b/libavformat/mxfenc.c
index db7d2bf455..142c8708d9 100644
--- a/libavformat/mxfenc.c
+++ b/libavformat/mxfenc.c
@@ -18,6 +18,8 @@
  * You should have received a copy of the GNU Lesser General Public
  * License along with FFmpeg; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * signal_standard, color_siting and klv_fill_key version fixes sponsored by NOA GmbH
  */
 
 /*