Corresponding source for CPPlayerKit's patched LGPL Libavformat.
FFmpeg/ is the complete, unmodified pinned upstream source; apply the
included native/patches/ffmpeg patch before rebuilding. See FFmpeg/COPYING*
and LICENSE* for the upstream licenses and native/apple/README.md for
the exact Apple rebuild procedure. Official generated configs, consumed
per-architecture configs, upstream pin metadata and build provenance are
included. Other MPVKit dependencies remain the official upstream binaries;
their source/license provenance remains in the pinned MPVKit project.
