X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=LICENSE;h=a2de35cf6346f11c1c19453bdeff2f852db60b30;hb=a0c443a3980dc22eb02b067ac4cb9ffa2f9b04d2;hp=24e0e4435468744d749ae95c77faceaef1bd1a42;hpb=ec7c501ed5ba14467d05b3def76c57b780bb7a12;p=ffmpeg

diff --git a/LICENSE b/LICENSE
index 24e0e443546..a2de35cf634 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,5 +1,5 @@
 Libav:
-------
+======
 
 Most files in Libav 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
@@ -13,7 +13,19 @@ configure to activate them. In this case, Libav's license changes to GPL v2+.
 
 Specifically, the GPL parts of Libav are
 
-- the X11 grabber in libavdevice/x11grab.c
+- the texi2pod.pl tool
+- the following filters in libavfilter:
+    - vf_blackframe.c
+    - vf_boxblur.c
+    - vf_cropdetect.c
+    - vf_delogo.c
+    - vf_hqdn3d.c
+    - vf_interlace.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:
 
@@ -24,24 +36,30 @@ There are a handful of files under other licensing terms, namely:
   You must also indicate any changes including additions and deletions to
   those three files in the documentation.
 
-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.
 
+external libraries
+==================
+
+Libav can be combined with a number of external libraries, which sometimes
+affect the licensing of binaries resulting from the combination.
+
+compatible libraries
+--------------------
 
-external libraries:
--------------------
+The libcdio, libx264, libx265, libxavs and libxvid libraries are under GPL. When
+combining them with Libav, Libav needs to be licensed as GPL as well by
+passing --enable-gpl to configure.
 
-Some external libraries, e.g. libx264, are under GPL and can be used in
-conjunction with Libav. They require --enable-gpl to be passed to configure
-as well.
+The OpenCORE and VisualOn libraries are under the Apache License 2.0. That
+license is incompatible with the LGPL v2.1 and the GPL v2, but not with
+version 3 of those licenses. So to combine these libraries with Libav, the
+license version needs to be upgraded by passing --enable-version3 to configure.
 
-The OpenCORE external libraries are under the Apache License 2.0. That license
-is incompatible with the LGPL v2.1 and the GPL v2, but not with version 3 of
-those licenses. So to combine the OpenCORE libraries with Libav, the license
-version needs to be upgraded by passing --enable-version3 to configure.
+incompatible libraries
+----------------------
 
-The nonfree external library libfaac can be hooked up in Libav. You need to
-pass --enable-nonfree to configure to enable it. Employ this option with care
-as Libav then becomes nonfree and unredistributable.
+The Fraunhofer AAC library, FAAC and OpenSSL are under licenses incompatible
+with all (L)GPL versions. Thus, unfortunately, since both licenses cannot be
+satisfied simultaneously, binaries resulting from the combination of Libav
+with these libraries are nonfree and unredistributable. If you wish to enable
+any of these libraries nonetheless, pass --enable-nonfree to configure.