diff options
Diffstat (limited to 'LICENSE')
| -rw-r--r-- | LICENSE | 45 |
1 files changed, 30 insertions, 15 deletions
@@ -1,27 +1,39 @@ -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: - vf_blackframe.c - vf_boxblur.c + - vf_colormatrix.c - vf_cropdetect.c - vf_delogo.c - vf_hqdn3d.c + - vf_mp.c + - vf_super2xsai.c + - vf_tinterlace.c - vf_yadif.c + - vsrc_mptestsrc.c There are a handful of files under other licensing terms, namely: @@ -41,26 +53,29 @@ 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 +FFmpeg can be combined with a number of external libraries, which sometimes affect the licensing of binaries resulting from the combination. compatible libraries -------------------- The libcdio, libx264, libxavs and libxvid libraries are under GPL. When -combining them with Libav, Libav needs to be licensed as GPL as well by +combining them with FFmpeg, FFmpeg needs to be licensed as GPL as well by passing --enable-gpl to configure. 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 +version 3 of those licenses. So to combine these libraries with FFmpeg, the license version needs to be upgraded by passing --enable-version3 to configure. incompatible libraries ---------------------- -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 und unredistributable. If you wish to enable -any of these libraries nonetheless, pass --enable-nonfree to configure. +The Fraunhofer AAC library, FAAC and aacplus are under licenses which +are incompatible with the GPLv2 and v3. We do not know for certain if their +licenses are compatible with the LGPL. +If you wish to enable these libraries, pass --enable-nonfree to configure. +But note that if you enable any of these libraries the resulting binary will +be under a complex license mix that is more restrictive than the LGPL and that +may result in additional obligations. It is possible that these +restrictions cause the resulting binary to be unredistributeable. |