mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-11-26 19:01:44 +02:00
51 lines
2.1 KiB
Plaintext
51 lines
2.1 KiB
Plaintext
FFmpeg:
|
|
-------
|
|
|
|
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
|
|
FFmpeg.
|
|
|
|
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, FFmpeg's license changes to GPL v2+.
|
|
|
|
Specifically, the GPL parts of FFmpeg are
|
|
|
|
- libpostproc
|
|
- some x86 optimizations in libswscale
|
|
- optional x86 optimizations in the files
|
|
libavcodec/x86/h264_deblock_sse2.asm
|
|
libavcodec/x86/h264_idct_sse2.asm
|
|
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.c, libavcodec/jrevdct.c
|
|
are taken from libjpeg, see the top of the files for licensing details.
|
|
|
|
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 FFmpeg. 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 FFmpeg, the license
|
|
version needs to be upgraded by passing --enable-version3 to configure.
|
|
|
|
The nonfree external libraries libamrnb, libamrwb and libfaac can be hooked up
|
|
in FFmpeg. You need to pass --enable-nonfree to configure to enable them. Employ
|
|
this option with care as FFmpeg then becomes nonfree and unredistributable.
|
|
Note that libfaac claims to be LGPL, but is not.
|