mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2024-12-11 01:25:25 +00:00
b315042c8c
This library does not fit into Libav as a whole and its code is just a maintenance burden. Furthermore it is now available as an external project, which completely obviates any reason to keep it around. URL: http://git.videolan.org/?p=libpostproc.git
50 lines
2.2 KiB
Plaintext
50 lines
2.2 KiB
Plaintext
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
|
|
files have MIT/X11/BSD-style licenses. In combination the LGPL v2.1+ applies to
|
|
Libav.
|
|
|
|
Some optional parts of Libav 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+.
|
|
|
|
Specifically, the GPL parts of Libav are
|
|
|
|
- optional x86 optimizations in the files
|
|
libavcodec/x86/idct_mmx.c
|
|
- the X11 grabber in libavdevice/x11grab.c
|
|
|
|
There are a handful of files under other licensing terms, namely:
|
|
|
|
* The files libavcodec/jfdctfst.c, libavcodec/jfdctint_template.c and
|
|
libavcodec/jrevdct.c are taken from libjpeg, see the top of the files for
|
|
licensing details. Specifically note that you must credit the IJG in the
|
|
documentation accompanying your program if you only distribute executables.
|
|
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:
|
|
-------------------
|
|
|
|
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 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.
|
|
|
|
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.
|