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FFmpeg: |
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------- |
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Most files in FFmpeg are under the GNU Lesser General Public License version 2.1 |
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or later (LGPL v2.1+). Read the file COPYING.LGPLv2.1 for details. Some other |
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files have MIT/X11/BSD-style licenses. In combination the LGPL v2.1+ applies to |
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FFmpeg. |
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|
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Some optional parts of FFmpeg are licensed under the GNU General Public License |
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version 2 or later (GPL v2+). See the file COPYING.GPLv2 for details. None of |
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these parts are used by default, you have to explicitly pass --enable-gpl to |
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configure to activate them. In this case, FFmpeg's license changes to GPL v2+. |
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Specifically, the GPL parts of FFmpeg are |
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|
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- libpostproc |
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- some x86 optimizations in libswscale |
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- optional x86 optimizations in the files |
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libavcodec/x86/h264_deblock_sse2.asm |
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libavcodec/x86/h264_idct_sse2.asm |
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libavcodec/x86/idct_mmx.c |
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- the X11 grabber in libavdevice/x11grab.c |
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There are a handful of files under other licensing terms, namely: |
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|
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* The files libavcodec/jfdctfst.c, libavcodec/jfdctint.c, libavcodec/jrevdct.c |
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are taken from libjpeg, see the top of the files for licensing details. |
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|
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Should you, for whatever reason, prefer to use version 3 of the (L)GPL, then |
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the configure parameter --enable-version3 will activate this licensing option |
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for you. Read the file COPYING.LGPLv3 or, if you have enabled GPL parts, |
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COPYING.GPLv3 to learn the exact legal terms that apply in this case. |
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external libraries: |
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------------------- |
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|
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Some external libraries, e.g. libx264, are under GPL and can be used in |
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conjunction with FFmpeg. They require --enable-gpl to be passed to configure |
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as well. |
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|
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The OpenCORE external libraries are under the Apache License 2.0. That license |
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is incompatible with the LGPL v2.1 and the GPL v2, but not with version 3 of |
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those licenses. So to combine the OpenCORE libraries with FFmpeg, the license |
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version needs to be upgraded by passing --enable-version3 to configure. |
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The nonfree external library libfaac can be hooked up in FFmpeg. You need to |
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pass --enable-nonfree to configure to enable it. Employ this option with care |
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as FFmpeg then becomes nonfree and unredistributable. |
