Tagtool bundles the following third-party software in this directory.
The full license texts are available at the URLs noted below.


================================================================================
FFmpeg
================================================================================

FFmpeg is licensed under the GNU Lesser General Public License (LGPL) version
2.1 or later. The bundled FFmpeg binary in this directory has been built
WITHOUT the --enable-gpl flag and WITHOUT --enable-nonfree, so it is LGPL 2.1.

Configure flags used (see README.md in this directory for the full build
instructions):

    --disable-everything
    --enable-programs
    --enable-encoder=hap --enable-decoder=hap
    --enable-encoder=rawvideo --enable-decoder=rawvideo
    --enable-muxer=mov --enable-demuxer=mov
    --enable-protocol=pipe --enable-protocol=file
    --enable-libsnappy
    --enable-small

In compliance with LGPL 2.1 § 6, the corresponding source code is available
at the FFmpeg upstream repository:

    https://github.com/FFmpeg/FFmpeg

The specific version (git tag or commit) used to build the bundled binary is
recorded in the build metadata. To rebuild bytewise-identical binaries from
the same source, use the configure flags above against the matching upstream
tag.

The full LGPL 2.1 license text:

    https://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt


================================================================================
Snappy
================================================================================

Snappy is licensed under a 3-clause BSD license:

    https://github.com/google/snappy/blob/main/COPYING

Copyright 2011, Google Inc. All rights reserved.

    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 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 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
    OWNER 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.


================================================================================
Vidvox Hap reference (algorithmic credit)
================================================================================

FFmpeg's HAP encoder (libavcodec/hapenc.c) was implemented from the Vidvox
Hap reference, which is published under a BSD-style license. The reference
implementation is at:

    https://github.com/Vidvox/hap

No code from the Vidvox reference is statically linked into the bundled
FFmpeg binary — FFmpeg's encoder is an independent re-implementation of the
Hap algorithm (DXT compression + Snappy) covered by the LGPL 2.1 above.
This notice is included for algorithmic credit.
