BatchForge+ — Bundled Third-Party Components
=============================================

BatchForge+ ships its own LGPL-2.1-only FFmpeg build inside the app
bundle at:

    BatchForge+.app/Contents/Resources/bin/ffmpeg
    BatchForge+.app/Contents/Resources/bin/ffprobe

The bundled FFmpeg is invoked as an external child process — BatchForge+
does NOT link to libavcodec / libavformat / libavutil. This usage is
covered by the "mere aggregation" / "separate program" interpretation
common to LGPL practice.

All libraries listed below are non-GPL and non-nonfree. The build is
locked to this guarantee by `Scripts/build_ffmpeg_lgpl.sh`, which fails
the binary verification if any GPL, nonfree, or restricted token (e.g.
libx264, libx265, libxvid, libfdk-aac, libvidstab, frei0r, postproc,
--enable-gpl, --enable-nonfree) is detected.

FFmpeg
------
  Version:  7.1.2
  License:  GNU LGPL 2.1 (see FFmpeg-LGPL-2.1.txt)
  Source:   https://ffmpeg.org/releases/ffmpeg-7.1.2.tar.xz
  Build:    see FFmpeg-BUILD-CONFIG.txt (auto-generated)
  Mirror:   https://b3lab.io/ffmpeg-source

Bundled runtime libraries (Sources/Resources/lib/)
---------------------------------------------------

  freetype       FTL (Freetype License, BSD-style)   https://freetype.org
  harfbuzz       MIT                                  https://harfbuzz.github.io
  fontconfig     HPND / MIT-Modern / Unicode-3.0      https://www.freedesktop.org/wiki/Software/fontconfig/
  fribidi        LGPL-2.1+                            https://github.com/fribidi/fribidi
  libass         ISC                                  https://github.com/libass/libass
  libunibreak    Zlib                                 https://github.com/adah1972/libunibreak
  glib           LGPL-2.1+                            https://gitlab.gnome.org/GNOME/glib
  libintl        LGPL-2.1+ (gettext runtime)          https://www.gnu.org/software/gettext/
  libpng         libpng / zlib-style                  http://libpng.org
  liblzma        Public Domain (XZ Utils)             https://tukaani.org/xz/
  libpcre2       BSD-3-Clause + PCRE2 Exception       https://pcre.org
  libgraphite2   LGPL-2.1+ (or MPL-1.1)               https://graphite.sil.org
  libsharpyuv    BSD-3-Clause (part of libwebp)       https://chromium.googlesource.com/webm/libwebp
  libwebp        BSD-3-Clause                         https://chromium.googlesource.com/webm/libwebp
  libwebpmux     BSD-3-Clause (part of libwebp)       https://chromium.googlesource.com/webm/libwebp
  libmp3lame     LGPL-2.0+                            https://lame.sourceforge.io
  libogg         BSD-3-Clause                         https://xiph.org/ogg/
  libopus        BSD-3-Clause                         https://opus-codec.org
  libvorbis      BSD-3-Clause                         https://xiph.org/vorbis/
  libvorbisenc   BSD-3-Clause                         https://xiph.org/vorbis/
  libvpx         BSD-3-Clause                         https://www.webmproject.org
  libdav1d       BSD-2-Clause                         https://code.videolan.org/videolan/dav1d
  libsnappy      BSD-3-Clause                         https://github.com/google/snappy

Apple-provided system frameworks (linked, not redistributed)
------------------------------------------------------------

  VideoToolbox      Apple — hardware H.264/HEVC/ProRes encode/decode
  AudioToolbox      Apple — hardware AAC/ALAC encode/decode
  CoreMedia         Apple — sample/buffer management
  CoreVideo         Apple — pixel buffer formats
  AVFoundation      Apple — playback timing references
  CoreFoundation    Apple — base utilities
  Foundation        Apple — base utilities

These frameworks are part of macOS and require no separate license.
H.264 / HEVC / AAC / ProRes / ALAC patent licensing for encoded output
produced through VideoToolbox / AudioToolbox is covered by Apple via the
end-user's macOS license; BatchForge+ does not redistribute these codecs
itself and is not the licensee for patent pools (MPEG-LA, HEVC Advance,
Velos Media, etc.).

Explicitly excluded from the build (would have made the result GPL or nonfree)
------------------------------------------------------------------------------

  libx264              GPL-2+ (software H.264 encoder)
  libx265              GPL-2+ (software H.265 encoder)
  libxvid              GPL-2+ (Xvid MPEG-4)
  libxavs / libxavs2   GPL (AVS encoder)
  libdavs2             GPL (AVS2 decoder)
  libuavs3d            GPL (AVS3 decoder)
  libvidstab           GPL (video stabilization)
  frei0r               GPL (video effects framework)
  librubberband        GPL (audio time-stretch)
  libtesseract         Apache-2.0 — excluded for size reasons, not legal
  libopencv            Apache-2.0 — excluded for size reasons, not legal
  libsmbclient         GPL (Samba)
  libfdk-aac           "nonfree" (Fraunhofer license restricts redistribution)
  postproc             GPL (legacy MPEG post-processing)

These libraries are guaranteed absent from the binary by the
`--disable-gpl --disable-nonfree` master switches plus explicit
`--disable-<lib>` flags, and re-verified by the build script via
`verify_binary()` against a forbidden-token list.

Source code availability
------------------------

Per the LGPL-2.1 redistribution obligation, the full source code of the
bundled FFmpeg build (including the exact build script used) is mirrored
at:

    https://b3lab.io/ffmpeg-source

You may also obtain the source directly upstream:

    https://ffmpeg.org/releases/ffmpeg-7.1.2.tar.xz

Together with `Scripts/build_ffmpeg_lgpl.sh` from this project, the
binary in `Contents/Resources/bin/` is reproducible from source.

Acknowledgement
---------------

This software uses libraries from the FFmpeg project under the LGPL-2.1.
We thank the FFmpeg developers and the developers of all bundled libraries
listed above.

  © b3LAB — Benni Mauz — 2026
  Apple Developer Team ID: 955RASMBV3
  Contact: support@b3lab.io