ffmpeg | Qt WebEngine 5.8

Qt 5.8 | Qt WebEngine | Qt WebEngine Licensing | ffmpeg

Qt 5.8.0 Reference Documentation

# ffmpeg

Project Homepage

      #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
      - optional x86 optimizations in the files
        - `libavcodec/x86/flac_dsp_gpl.asm`
        - `libavcodec/x86/idct_mmx.c`
        - `libavfilter/x86/vf_removegrain.asm`
      - libutvideo encoding/decoding wrappers in
        `libavcodec/libutvideo*.cpp`
      - the X11 grabber in `libavdevice/x11grab.c`
      - the swresample test app in
        `libswresample/swresample-test.c`
      - the `texi2pod.pl` tool
      - the following filters in libavfilter:
          - `f_ebur128.c`
          - `vf_blackframe.c`
          - `vf_boxblur.c`
          - `vf_colormatrix.c`
          - `vf_cover_rect.c`
          - `vf_cropdetect.c`
          - `vf_delogo.c`
          - `vf_eq.c`
          - `vf_find_rect.c`
          - `vf_fspp.c`
          - `vf_geq.c`
          - `vf_histeq.c`
          - `vf_hqdn3d.c`
          - `vf_interlace.c`
          - `vf_kerndeint.c`
          - `vf_mcdeint.c`
          - `vf_mpdecimate.c`
          - `vf_owdenoise.c`
          - `vf_perspective.c`
          - `vf_phase.c`
          - `vf_pp.c`
          - `vf_pp7.c`
          - `vf_pullup.c`
          - `vf_sab.c`
          - `vf_smartblur.c`
          - `vf_repeatfields.c`
          - `vf_spp.c`
          - `vf_stereo3d.c`
          - `vf_super2xsai.c`
          - `vf_tinterlace.c`
          - `vf_uspp.c`
          - `vsrc_mptestsrc.c`

      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.

      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.
      * `tests/reference.pnm` is under the expat license.

      external libraries
      ==================

      FFmpeg can be combined with a number of external libraries, which sometimes
      affect the licensing of binaries resulting from the combination.

      compatible libraries
      --------------------

      The following libraries are under GPL:
      - frei0r
      - libcdio
      - librubberband
      - libutvideo
      - libvidstab
      - libx264
      - libx265
      - libxavs
      - libxvid

      When combining them with FFmpeg, FFmpeg needs to be licensed as GPL as well by
      passing `--enable-gpl` to configure.

      The OpenCORE and VisualOn 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 these libraries with FFmpeg, the
      license version needs to be upgraded by passing `--enable-version3` to configure.

      incompatible libraries
      ----------------------

      The Fraunhofer AAC library and FAAC are under licenses which
      are incompatible with the GPLv2 and v3. We do not know for certain if their
      licenses are compatible with the LGPL.
      If you wish to enable these libraries, pass `--enable-nonfree` to configure.
      But note that if you enable any of these libraries the resulting binary will
      be under a complex license mix that is more restrictive than the LGPL and that
      may result in additional obligations. It is possible that these
      restrictions cause the resulting binary to be unredistributeable.

      ********************************************************************************

      libavcodec/arm/vp8dsp_armv6.S

      VP8 ARMv6 optimisations

      Copyright (c) 2010 Google Inc.
      Copyright (c) 2010 Rob Clark &lt;rob@ti.com&gt;
      Copyright (c) 2011 Mans Rullgard &lt;mans@mansr.com&gt;

      This file is part of FFmpeg.

      FFmpeg is free software; you can redistribute it and/or
      modify it under the terms of the GNU Lesser General Public
      License as published by the Free Software Foundation; either
      version 2.1 of the License, or (at your option) any later version.

      FFmpeg is distributed in the hope that it will be useful,
      but WITHOUT ANY WARRANTY; without even the implied warranty of
      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      Lesser General Public License for more details.

      You should have received a copy of the GNU Lesser General Public
      License along with FFmpeg; if not, write to the Free Software
      Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

      This code was partially ported from libvpx, which uses this license:

      Redistribution and use in source and binary forms, with or without
      modification, are permitted provided that the following conditions are
      met:

      * Redistributions of source code must retain the above copyright
      notice, this list of conditions and the following disclaimer.

      * Redistributions in binary form must reproduce the above copyright
      notice, this list of conditions and the following disclaimer in
      the documentation and/or other materials provided with the
      distribution.

      * Neither the name of Google nor the names of its contributors may
      be used to endorse or promote products derived from this software
      without specific prior written permission.

      THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
      "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
      LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
      A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
      HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
      SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
      LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
      DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
      THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
      (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
      OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

      ********************************************************************************

      libavformat/oggparsespeex.c

      Copyright (C) 2008  Reimar Döffinger

            Permission is hereby granted, free of charge, to any person
            obtaining a copy of this software and associated documentation
            files (the "Software"), to deal in the Software without
            restriction, including without limitation the rights to use, copy,
            modify, merge, publish, distribute, sublicense, and/or sell copies
            of the Software, and to permit persons to whom the Software is
            furnished to do so, subject to the following conditions:

            The above copyright notice and this permission notice shall be
            included in all copies or substantial portions of the Software.

            THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
            EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
            MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
            NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
            HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
            WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
            OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
            DEALINGS IN THE SOFTWARE.

      ********************************************************************************

      libavcodec/x86/xvididct.asm

      XVID MPEG-4 VIDEO CODEC

       Conversion from gcc syntax to x264asm syntax with modifications
       by Christophe Gisquet &lt;christophe.gisquet@gmail.com&gt;

       ===========     SSE2 inverse discrete cosine transform     ===========

       Copyright(C) 2003 Pascal Massimino &lt;skal@planet-d.net&gt;

       Conversion to gcc syntax with modifications
       by Alexander Strange &lt;astrange@ithinksw.com&gt;

       Originally from dct/x86_asm/fdct_sse2_skal.asm in Xvid.

       Vertical pass is an implementation of the scheme:
        Loeffler C., Ligtenberg A., and Moschytz C.S.:
        Practical Fast 1D DCT Algorithm with Eleven Multiplications,
        Proc. ICASSP 1989, 988-991.

       Horizontal pass is a double 4x4 vector/matrix multiplication,
       (see also Intel's Application Note 922:
        http://developer.intel.com/vtune/cbts/strmsimd/922down.htm
        Copyright (C) 1999 Intel Corporation)

       More details at http://skal.planet-d.net/coding/dct.html

       =======     MMX and XMM forward discrete cosine transform     =======

       Copyright(C) 2001 Peter Ross &lt;pross@xvid.org&gt;

       Originally provided by Intel at AP-922
       http://developer.intel.com/vtune/cbts/strmsimd/922down.htm
       (See more app notes at http://developer.intel.com/vtune/cbts/strmsimd/appnotes.htm)
       but in a limited edition.
       New macro implements a column part for precise iDCT
       The routine precision now satisfies IEEE standard 1180-1990.

       Copyright(C) 2000-2001 Peter Gubanov &lt;peter@elecard.net.ru&gt;
       Rounding trick Copyright(C) 2000 Michel Lespinasse &lt;walken@zoy.org&gt;

       http://www.elecard.com/peter/idct.html
       http://www.linuxvideo.org/mpeg2dec/

       These examples contain code fragments for first stage iDCT 8x8
       (for rows) and first stage DCT 8x8 (for columns)

       conversion to gcc syntax by Michael Niedermayer

       ======================================================================

       This file is part of FFmpeg.

       FFmpeg is free software; you can redistribute it and/or
       modify it under the terms of the GNU Lesser General Public
       License as published by the Free Software Foundation; either
       version 2.1 of the License, or (at your option) any later version.

       FFmpeg is distributed in the hope that it will be useful,
       but WITHOUT ANY WARRANTY; without even the implied warranty of
       MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
       Lesser General Public License for more details.

       You should have received a copy of the GNU Lesser General Public License
       along with FFmpeg; if not, write to the Free Software Foundation,
       Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

      ********************************************************************************

      libavcodec/arm/jrevdct_arm.S

      C-like prototype :
              void j_rev_dct_arm(DCTBLOCK data)

         With DCTBLOCK being a pointer to an array of 64 'signed shorts'

         Copyright (c) 2001 Lionel Ulmer (lionel.ulmer@free.fr / bbrox@bbrox.org)

         Permission is hereby granted, free of charge, to any person obtaining a copy
         of this software and associated documentation files (the "Software"), to deal
         in the Software without restriction, including without limitation the rights
         to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
         copies of the Software, and to permit persons to whom the Software is
         furnished to do so, subject to the following conditions:

         The above copyright notice and this permission notice shall be included in
         all copies or substantial portions of the Software.

         THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
         IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
         FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
         COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
         IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
         CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

      ********************************************************************************

      libswresample/version.h

      Version macros.

      This file is part of libswresample

      libswresample is free software; you can redistribute it and/or
      modify it under the terms of the GNU Lesser General Public
      License as published by the Free Software Foundation; either
      version 2.1 of the License, or (at your option) any later version.

      libswresample is distributed in the hope that it will be useful,
      but WITHOUT ANY WARRANTY; without even the implied warranty of
      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      Lesser General Public License for more details.

      You should have received a copy of the GNU Lesser General Public
      License along with libswresample; if not, write to the Free Software
      Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

      ********************************************************************************

      libavcodec/faandct.c

      Floating point AAN DCT
      this implementation is based upon the IJG integer AAN DCT (see jfdctfst.c)

      Copyright (c) 2003 Michael Niedermayer &lt;michaelni@gmx.at&gt;
      Copyright (c) 2003 Roman Shaposhnik

      Permission to use, copy, modify, and/or distribute this software for any
      purpose with or without fee is hereby granted, provided that the above
      copyright notice and this permission notice appear in all copies.

      THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
      WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
      MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
      ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
      WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
      ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
      OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

      ********************************************************************************

      libavformat/oggparsetheora.c

      Copyright (C) 2005  Matthieu CASTET, Alex Beregszaszi

      Permission is hereby granted, free of charge, to any person
      obtaining a copy of this software and associated documentation
      files (the "Software"), to deal in the Software without
      restriction, including without limitation the rights to use, copy,
      modify, merge, publish, distribute, sublicense, and/or sell copies
      of the Software, and to permit persons to whom the Software is
      furnished to do so, subject to the following conditions:

      The above copyright notice and this permission notice shall be
      included in all copies or substantial portions of the Software.

      THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
      EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
      MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
      NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
      HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
      WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
      OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
      DEALINGS IN THE SOFTWARE.

      ********************************************************************************

      libswresample/swresample.h

      Copyright (C) 2011-2013 Michael Niedermayer (michaelni@gmx.at)

      This file is part of libswresample

      libswresample is free software; you can redistribute it and/or
      modify it under the terms of the GNU Lesser General Public
      License as published by the Free Software Foundation; either
      version 2.1 of the License, or (at your option) any later version.

      libswresample is distributed in the hope that it will be useful,
      but WITHOUT ANY WARRANTY; without even the implied warranty of
      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      Lesser General Public License for more details.

      You should have received a copy of the GNU Lesser General Public
      License along with libswresample; if not, write to the Free Software
      Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

      ********************************************************************************

      libavcodec/jfdctfst.c
      libavcodec/jfdctint_template.c
      libavcodec/jrevdct.c

      This file is part of the Independent JPEG Group's software.

      The authors make NO WARRANTY or representation, either express or implied,
      with respect to this software, its quality, accuracy, merchantability, or
      fitness for a particular purpose.  This software is provided "AS IS", and
      you, its user, assume the entire risk as to its quality and accuracy.

      This software is copyright (C) 1994-1996, Thomas G. Lane.
      All Rights Reserved except as specified below.

      Permission is hereby granted to use, copy, modify, and distribute this
      software (or portions thereof) for any purpose, without fee, subject to
      these conditions:
      (1) If any part of the source code for this software is distributed, then
      this README file must be included, with this copyright and no-warranty
      notice unaltered; and any additions, deletions, or changes to the original
      files must be clearly indicated in accompanying documentation.
      (2) If only executable code is distributed, then the accompanying
      documentation must state that "this software is based in part on the work
      of the Independent JPEG Group".
      (3) Permission for use of this software is granted only if the user accepts
      full responsibility for any undesirable consequences; the authors accept
      NO LIABILITY for damages of any kind.

      These conditions apply to any software derived from or based on the IJG
      code, not just to the unmodified library.  If you use our work, you ought
      to acknowledge us.

      Permission is NOT granted for the use of any IJG author's name or company
      name in advertising or publicity relating to this software or products
      derived from it.  This software may be referred to only as "the Independent
      JPEG Group's software".

      We specifically permit and encourage the use of this software as the basis
      of commercial products, provided that all warranty or liability claims are
      assumed by the product vendor.

      ********************************************************************************

      libavcodec/fft_fixed_32.c
      libavcodec/fft_init_table.c
      libavcodec/fft_table.h
      libavcodec/mdct_fixed_32.c
      libavcodec/mips/aacdec_mips.c
      libavcodec/mips/aacdec_mips.h
      libavcodec/mips/aacpsdsp_mips.c
      libavcodec/mips/aacsbr_mips.c
      libavcodec/mips/aacsbr_mips.h
      libavcodec/mips/amrwbdec_mips.h
      libavcodec/mips/compute_antialias_fixed.h
      libavcodec/mips/compute_antialias_float.h
      libavcodec/mips/lsp_mips.h
      libavcodec/mips/sbrdsp_mips.c
      libavutil/fixed_dsp.c
      libavutil/fixed_dsp.h
      libavutil/mips/float_dsp_mips.c
      libavutil/mips/libm_mips.h
      libavutil/softfloat_tables.h

      Copyright (c) 2012
      MIPS Technologies, Inc., California.

      Redistribution and use in source and binary forms, with or without
      modification, are permitted provided that the following conditions
      are met:
      1. Redistributions of source code must retain the above copyright
      notice, this list of conditions and the following disclaimer.
      2. Redistributions in binary form must reproduce the above copyright
      notice, this list of conditions and the following disclaimer in the
      documentation and/or other materials provided with the distribution.
      3. Neither the name of the MIPS Technologies, Inc., nor the names of its
      contributors may be used to endorse or promote products derived from
      this software without specific prior written permission.

      THIS SOFTWARE IS PROVIDED BY THE MIPS TECHNOLOGIES, INC. ``AS IS'' AND
      ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
      IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
      ARE DISCLAIMED.  IN NO EVENT SHALL THE MIPS TECHNOLOGIES, INC. BE LIABLE
      FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
      DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
      OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
      HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
      LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
      OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
      SUCH DAMAGE.

      Authors:
      Branimir Vasic   (bvasic@mips.com)
      Darko Laus       (darko@mips.com)
      Djordje Pesut    (djordje@mips.com)
      Goran Cordasic   (goran@mips.com)
      Nedeljko Babic   (nedeljko.babic imgtec com)
      Mirjana Vulin    (mvulin@mips.com)
      Stanislav Ocovaj (socovaj@mips.com)
      Zoran Lukic      (zoranl@mips.com)

      ********************************************************************************

      libavformat/oggdec.c
      libavformat/oggdec.h
      libavformat/oggparseogm.c
      libavformat/oggparsevorbis.c

      Copyright (C) 2005  Michael Ahlberg, MÃ¥ns RullgÃ¥rd

      Permission is hereby granted, free of charge, to any person
      obtaining a copy of this software and associated documentation
      files (the "Software"), to deal in the Software without
      restriction, including without limitation the rights to use, copy,
      modify, merge, publish, distribute, sublicense, and/or sell copies
      of the Software, and to permit persons to whom the Software is
      furnished to do so, subject to the following conditions:

      The above copyright notice and this permission notice shall be
      included in all copies or substantial portions of the Software.

      THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
      EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
      MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
      NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
      HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
      WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
      OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
      DEALINGS IN THE SOFTWARE.

      ********************************************************************************

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                             Version 2.1, February 1999

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      [This is the first released version of the Lesser GPL.  It also counts
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