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Native audio library policy

Release builds use FFmpeg 8.1.2 and libopenmpt 0.8.7 from the checksummed archives in scripts/ffmpeg/build.sh. The configuration starts with --disable-everything, enables only audio demux/decode/resampling, disables the FFmpeg network stack, and never enables --enable-gpl or --enable-nonfree.

HTTP(S), redirects, playlists, cancellation, and ICY metadata are implemented by Rust/rustls and exposed to FFmpeg through custom read-only AVIO. FFmpeg is dynamically linked so users retain the LGPL relinking/replacement rights. Every binary release must include:

  • both exact source archives;
  • ffmpeg-config.txt and ffmpeg-config.log from the target build;
  • THIRD_PARTY_NOTICES.md and the versioned SBOM files;
  • the shared FFmpeg and libopenmpt libraries used by the executable.

The public prerelease workflow is intentionally not a stable-release signal. Each produced package must additionally be inspected on a clean machine to confirm that no build-host library path remains and that only the intended LGPL/BSD libraries are present.

On macOS, run scripts/release/bundle-macos-libs.sh after creating the .app and before signing or building the DMG. The script recursively copies dylibs to Contents/Frameworks, rewrites their load paths, and fails if a non-system dependency comes from outside the pinned build prefix. This prevents an accidental Homebrew development build from becoming a public artifact.