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c0b1bc8 @michaelni Revert "partially rename FFmpeg to Libav"
michaelni authored
1 FFmpeg:
4656c37 @DonDiego Move around one paragraph, add headings for greater clarity.
DonDiego authored
2
c0b1bc8 @michaelni Revert "partially rename FFmpeg to Libav"
michaelni authored
3 Most files in FFmpeg are under the GNU Lesser General Public License version 2.1
ecc1330 @DonDiego Rename COPYING.GPL --> COPYING.GPLv2 and COPYING.LGPL --> COPYING.LGP…
DonDiego authored
4 or later (LGPL v2.1+). Read the file COPYING.LGPLv2.1 for details. Some other
5 files have MIT/X11/BSD-style licenses. In combination the LGPL v2.1+ applies to
c0b1bc8 @michaelni Revert "partially rename FFmpeg to Libav"
michaelni authored
6 FFmpeg.
aae9c40 @DonDiego Move licensing information into a separate file called LICENSE and
DonDiego authored
7
c0b1bc8 @michaelni Revert "partially rename FFmpeg to Libav"
michaelni authored
8 Some optional parts of FFmpeg are licensed under the GNU General Public License
ecc1330 @DonDiego Rename COPYING.GPL --> COPYING.GPLv2 and COPYING.LGPL --> COPYING.LGP…
DonDiego authored
9 version 2 or later (GPL v2+). See the file COPYING.GPLv2 for details. None of
aae9c40 @DonDiego Move licensing information into a separate file called LICENSE and
DonDiego authored
10 these parts are used by default, you have to explicitly pass --enable-gpl to
c0b1bc8 @michaelni Revert "partially rename FFmpeg to Libav"
michaelni authored
11 configure to activate them. In this case, FFmpeg's license changes to GPL v2+.
aae9c40 @DonDiego Move licensing information into a separate file called LICENSE and
DonDiego authored
12
c0b1bc8 @michaelni Revert "partially rename FFmpeg to Libav"
michaelni authored
13 Specifically, the GPL parts of FFmpeg are
aae9c40 @DonDiego Move licensing information into a separate file called LICENSE and
DonDiego authored
14
15 - libpostproc
878b3f2 @dwbuiten LICENSE: Document all GPL files
dwbuiten authored
16 - libmpcodecs
aae9c40 @DonDiego Move licensing information into a separate file called LICENSE and
DonDiego authored
17 - optional x86 optimizations in the files
18 libavcodec/x86/idct_mmx.c
878b3f2 @dwbuiten LICENSE: Document all GPL files
dwbuiten authored
19 - libutvideo encoding/decoding wrappers in
20 libavcodec/libutvideo*.cpp
aae9c40 @DonDiego Move licensing information into a separate file called LICENSE and
DonDiego authored
21 - the X11 grabber in libavdevice/x11grab.c
878b3f2 @dwbuiten LICENSE: Document all GPL files
dwbuiten authored
22 - the swresample test app in
23 libswresample/swresample-test.c
144e4b0 @dwbuiten LICENSE: Document all GPL files
dwbuiten authored
24 - the texi2pod.pl tool
25 - the following filters in libavfilter:
26 - vf_blackframe.c
27 - vf_boxblur.c
878b3f2 @dwbuiten LICENSE: Document all GPL files
dwbuiten authored
28 - vf_colormatrix.c
144e4b0 @dwbuiten LICENSE: Document all GPL files
dwbuiten authored
29 - vf_cropdetect.c
30 - vf_delogo.c
31 - vf_hqdn3d.c
878b3f2 @dwbuiten LICENSE: Document all GPL files
dwbuiten authored
32 - vf_mp.c
33 - vf_super2xsai.c
34 - vf_tinterlace.c
144e4b0 @dwbuiten LICENSE: Document all GPL files
dwbuiten authored
35 - vf_yadif.c
878b3f2 @dwbuiten LICENSE: Document all GPL files
dwbuiten authored
36 - vsrc_mptestsrc.c
aae9c40 @DonDiego Move licensing information into a separate file called LICENSE and
DonDiego authored
37
4656c37 @DonDiego Move around one paragraph, add headings for greater clarity.
DonDiego authored
38 There are a handful of files under other licensing terms, namely:
39
24d150b @DonDiego Clarify licensing information about files borrowed from libjpeg.
DonDiego authored
40 * The files libavcodec/jfdctfst.c, libavcodec/jfdctint_template.c and
41 libavcodec/jrevdct.c are taken from libjpeg, see the top of the files for
42 licensing details. Specifically note that you must credit the IJG in the
43 documentation accompanying your program if you only distribute executables.
44 You must also indicate any changes including additions and deletions to
45 those three files in the documentation.
4656c37 @DonDiego Move around one paragraph, add headings for greater clarity.
DonDiego authored
46
9cad0e4 @DonDiego Add configure option to upgrade (L)GPL to version 3.
DonDiego authored
47 Should you, for whatever reason, prefer to use version 3 of the (L)GPL, then
48 the configure parameter --enable-version3 will activate this licensing option
49 for you. Read the file COPYING.LGPLv3 or, if you have enabled GPL parts,
50 COPYING.GPLv3 to learn the exact legal terms that apply in this case.
51
4656c37 @DonDiego Move around one paragraph, add headings for greater clarity.
DonDiego authored
52
f30ff54 @DonDiego doc: Clarify licensing issues arising from external libraries
DonDiego authored
53 external libraries
54 ==================
4656c37 @DonDiego Move around one paragraph, add headings for greater clarity.
DonDiego authored
55
d8c3170 @michaelni Merge remote-tracking branch 'qatar/master'
michaelni authored
56 FFmpeg can be combined with a number of external libraries, which sometimes
f30ff54 @DonDiego doc: Clarify licensing issues arising from external libraries
DonDiego authored
57 affect the licensing of binaries resulting from the combination.
aae9c40 @DonDiego Move licensing information into a separate file called LICENSE and
DonDiego authored
58
f30ff54 @DonDiego doc: Clarify licensing issues arising from external libraries
DonDiego authored
59 compatible libraries
60 --------------------
0b175ca @DonDiego Add support for external OpenCORE libraries for AMR-NB/WB support.
DonDiego authored
61
f30ff54 @DonDiego doc: Clarify licensing issues arising from external libraries
DonDiego authored
62 The libcdio, libx264, libxavs and libxvid libraries are under GPL. When
d8c3170 @michaelni Merge remote-tracking branch 'qatar/master'
michaelni authored
63 combining them with FFmpeg, FFmpeg needs to be licensed as GPL as well by
f30ff54 @DonDiego doc: Clarify licensing issues arising from external libraries
DonDiego authored
64 passing --enable-gpl to configure.
65
66 The OpenCORE and VisualOn libraries are under the Apache License 2.0. That
67 license is incompatible with the LGPL v2.1 and the GPL v2, but not with
d8c3170 @michaelni Merge remote-tracking branch 'qatar/master'
michaelni authored
68 version 3 of those licenses. So to combine these libraries with FFmpeg, the
f30ff54 @DonDiego doc: Clarify licensing issues arising from external libraries
DonDiego authored
69 license version needs to be upgraded by passing --enable-version3 to configure.
70
71 incompatible libraries
72 ----------------------
73
484aec4 @michaelni LICENSE: correct incorrect claims on *GPL incompatibility
michaelni authored
74 The Fraunhofer AAC library, FAAC and aacplus are under licenses which
75 are incompatible with the GPLv2 and v3. We do not know for certain if their
76 licenses are compatible with the LGPL.
77 If you wish to enable these libraries, pass --enable-nonfree to configure.
78 But note that if you enable any of these libraries the resulting binary will
79 be under a complex license mix that is more restrictive than the LGPL and that
80 may result in additional obligations. It is possible that these
81 restrictions cause the resulting binary to be unredistributeable.
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