-Libav:
-======
+FFmpeg:
-Most files in Libav are under the GNU Lesser General Public License version 2.1
+Most files in FFmpeg are under the GNU Lesser General Public License version 2.1
or later (LGPL v2.1+). Read the file COPYING.LGPLv2.1 for details. Some other
files have MIT/X11/BSD-style licenses. In combination the LGPL v2.1+ applies to
-Libav.
+FFmpeg.
-Some optional parts of Libav are licensed under the GNU General Public License
+Some optional parts of FFmpeg are licensed under the GNU General Public License
version 2 or later (GPL v2+). See the file COPYING.GPLv2 for details. None of
these parts are used by default, you have to explicitly pass --enable-gpl to
-configure to activate them. In this case, Libav's license changes to GPL v2+.
+configure to activate them. In this case, FFmpeg's license changes to GPL v2+.
-Specifically, the GPL parts of Libav are
+Specifically, the GPL parts of FFmpeg are
+- libpostproc
+- libmpcodecs
+- optional x86 optimizations in the files
+ libavcodec/x86/idct_mmx.c
+- libutvideo encoding/decoding wrappers in
+ libavcodec/libutvideo*.cpp
- the X11 grabber in libavdevice/x11grab.c
+- the swresample test app in
+ libswresample/swresample-test.c
- the texi2pod.pl tool
- the following filters in libavfilter:
+ - f_ebur128.c
- vf_blackframe.c
- vf_boxblur.c
+ - vf_colormatrix.c
- vf_cropdetect.c
+ - vf_decimate.c
- vf_delogo.c
+ - vf_geq.c
+ - vf_histeq.c
- vf_hqdn3d.c
+ - vf_hue.c
+ - vf_kerndeint.c
+ - vf_mp.c
+ - vf_noise.c
+ - vf_pp.c
+ - vf_smartblur.c
+ - vf_super2xsai.c
+ - vf_tinterlace.c
- vf_yadif.c
+ - vsrc_mptestsrc.c
+ Should you, for whatever reason, prefer to use version 3 of the (L)GPL, then
+ the configure parameter --enable-version3 will activate this licensing option
+ for you. Read the file COPYING.LGPLv3 or, if you have enabled GPL parts,
+ COPYING.GPLv3 to learn the exact legal terms that apply in this case.
+
There are a handful of files under other licensing terms, namely:
* The files libavcodec/jfdctfst.c, libavcodec/jfdctint_template.c and