+* The file libavcodec/i386/idct_mmx.c is distributed under the GNU General
+ Public License. It is strictly an optimization and its use is optional.
+
+* The file libavdevice/x11grab.c is distributed under the GNU General
+ Public License. X11 grabbing is optional.
+
+* The files libavcodec/jfdctfst.c, libavcodec/jfdctint.c, libavcodec/jrevdct.c
+ are taken from libjpeg, see the top of the files for licensing details.
+
+* The file libavcodec/fdctref.c is copyrighted by the MPEG Software Simulation
+ Group with all rights reserved. It is only used to create a DCT test program
+ and not compiled into libavcodec.