Specifically, the GPL parts of FFmpeg are
- libpostproc
-- some x86 and AltiVec optimizations in libswscale
+- some x86 optimizations in libswscale
- optional x86 optimizations in the files
libavcodec/x86/h264_deblock_sse2.asm
libavcodec/x86/h264_idct_sse2.asm
libavcodec/x86/idct_mmx.c
-- the AC-3 decoder in libavcodec/ac3dec.c
- the X11 grabber in libavdevice/x11grab.c
Some external libraries, e.g. libx264, are under GPL and can be used in
conjunction with FFmpeg. They require --enable-gpl to be passed to configure
as well.
-The nonfree external libraries libamrnb and libamrwb can be hooked up in FFmpeg.
-You need to pass --enable-nonfree to configure to enable them. Employ this
-option with care as FFmpeg then beomes nonfree and unredistributable.
+The nonfree external libraries libamrnb, libamrwb and libfaac can be hooked up
+in FFmpeg. You need to pass --enable-nonfree to configure to enable them. Employ
+this option with care as FFmpeg then becomes nonfree and unredistributable.
+Note that libfaac claims to be LGPL, but is not.
There are a handful of files under other licensing terms, namely:
* 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.