mirror of
https://gitee.com/openharmony/third_party_ffmpeg
synced 2024-11-23 19:30:05 +00:00
aae9c405c7
rewrite it for greater clarity in the process. Originally committed as revision 18185 to svn://svn.ffmpeg.org/ffmpeg/trunk
38 lines
1.7 KiB
Plaintext
38 lines
1.7 KiB
Plaintext
Most files in FFmpeg are under the GNU Lesser General Public License version 2.1
|
|
or later (LGPL v2.1+). Read the file COPYING.LGPL for details. Some other files
|
|
have a MIT/X11/BSD-style license. 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.GPL 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 and AltiVec 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 AC-3 decoder in libavcodec/ac3dec.c
|
|
- the X11 grabber in libavdevice/x11grab.c
|
|
|
|
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 nonfree external libraries libamrnb and libamrwb 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 beomes nonfree and unredistributable.
|
|
|
|
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.
|
|
|
|
* The file libavcodec/fdctref.c is copyrighted by the MPEG Software Simulation
|
|
Group with all rights reserved. It is only used to create a DCT test program
|
|
and not compiled into libavcodec.
|