diff options
| -rw-r--r-- | LICENSE | 37 | ||||
| -rw-r--r-- | README | 33 |
2 files changed, 38 insertions, 32 deletions
diff --git a/LICENSE b/LICENSE new file mode 100644 index 0000000000..61a080778d --- /dev/null +++ b/LICENSE @@ -0,0 +1,37 @@ +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. @@ -9,35 +9,4 @@ FFmpeg README 2) Licensing ------------ -* Read the file COPYING.LGPL. FFmpeg and the associated libraries EXCEPT - for libpostproc are licensed under the GNU Lesser General Public License - version 2.1 or later. - -* libpostproc is distributed under the GNU General Public License version 2 - or later, see the file COPYING.GPL for details. Its compilation and use in - FFmpeg is optional. - -* libswscale contains some optional processor-specific optimizations that are - distributed under the GNU General Public License version 2 or later. - -* The files libavcodec/x86/idct_mmx.c, libavcodec/x86/h264_deblock_sse2.asm - and libavcodec/x86/h264_idct_sse2.asm are distributed under the GNU General - Public License version 2 or later. They are strictly optimizations and - their use is optional. - -* The file libavcodec/ac3dec.c is distributed under the GNU General Public - License version 2 or later. In order for (E-)AC-3 decoding to work you - need to enable GPL components. - -* The file libavdevice/x11grab.c is distributed under the GNU General - Public License version 2 or later. X11 grabbing is optional. - -* 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. - -* Some external libraries are under GPL. If you wish to use them with FFmpeg, - you have to configure FFmpeg as GPL as well. +* See the LICENSE file. |