EasyGrade FFmpeg corresponding source and build material

This archive contains the exact source archives used to build the separately
invoked FFmpeg executable distributed with EasyGrade, plus x264 and dav1d.
FFmpeg and x264 are free software under their included GPL license terms.
You may use, study, modify and redistribute them under those terms. You do not
need an EasyGrade paid license to access this archive or exercise those rights.
This archive does not change the licenses of EasyGrade or other components.

The build uses FFmpeg 7.1.5 and the included x264 stable snapshot. The source
archives were not edited. The manifest pins the actual bytes by SHA-256; the
x264 stable download URL can change, so use the INCLUDED archive to rebuild.
pkgconf 2.3.0 is included as a build tool; it is not linked into FFmpeg.
The external non-system libraries linked into FFmpeg are x264 and dav1d.
dav1d is provided under its included BSD-2-Clause license.
Apple SDK/system libraries are supplied by macOS/Apple Command Line Tools.

Rebuild on an Apple Silicon Mac with Apple's Command Line Tools installed:
1. Extract this ZIP to a writable folder, ideally without spaces in its path.
2. In Terminal, change into that folder and run:
   python3 -m venv build-tools
   build-tools/bin/python -m pip install meson==1.9.1 ninja==1.13.0
   tar -xf ffmpeg-7.1.5.tar.xz
   tar -xf x264-stable.tar.bz2
   tar -xf dav1d-1.5.1.tar.xz
   tar -xf pkgconf-2.3.0.tar.xz
   sh build-distributable-ffmpeg.sh
3. The executable is install/bin/ffmpeg. Check its -L output.
The script records the compiler/SDK, configure options and deployment target.
Original generated config files are supplied for inspection, not to overwrite
the new configuration. The local build paths will differ on your machine.
This is a source-rebuild recipe, not a promise of byte-for-byte reproducibility.

Replacement: set IMAGEIO_FFMPEG_EXE to the full path of your compatible FFmpeg
executable before launching EasyGrade. Your replacement needs the filters and
codecs used by the app (including lut3d, unsharp, noise, vignette, PNG, libx264,
ProRes and AAC). No app license is required to run FFmpeg itself.

Redistributors: keep this archive with the executable and preserve the included
licenses. The app also contains this archive and an ungated Save source button.
Do not distribute only the old opaque imageio FFmpeg binary by mistake.
Codec patent rights are separate from these copyright licenses.
