FFmpeg 8.1.2
Annex B uses unmodified code from the FFmpeg project under the GNU Lesser General Public License version 2.1 or later. The app dynamically links a separately embedded CFFmpeg.framework built without GPL, nonfree, network, OpenSSL, x264, or x265 components.
- Official corresponding source archive (11,710,924 bytes)
- Official detached signature
- Annex B source changes (empty; source is unmodified)
- Build instructions, configuration, pins, and verification
- GNU LGPL 2.1 text
Apple open source Swift packages
swift-nio-ssh, swift-nio, swift-crypto, swift-atomics, swift-collections, swift-system, and swift-asn1 are used under the Apache License 2.0. Swift Crypto also carries its bundled third-party notices.
Zstandard 1.5.7
Annex B compiles the official decompression-only Zstandard amalgamation under its BSD license. The exact release archive and generated-source hashes are recorded in the source repository.
Annex B
Annex B is fully open source under the MIT License. The complete source can be inspected, audited, modified, and built from the public repository.
Website dependencies
The website uses Next.js, React, Tailwind CSS, and Lucide. Dependency versions and transitive licenses are pinned in the Yarn lockfile.
SF Pro
The website self-hosts SF Pro variable font files from the complete source copy kept in this repository. The project owner has confirmed permission for public self-hosting.
Apple font distribution and terms
Device frame
The website's iPhone 17 Pro Max Silver frame is sourced from fastlane/frameit-frames and composited with Annex B's own screenshots using the catalog's published offsets.
Rights
FFmpeg, Zstandard, and the listed Swift packages remain the property of their respective copyright holders. Annex B's terms do not prohibit reverse engineering for debugging modifications to the LGPL-covered library.