FFmpeg Notice

Applies to macOS app 0.1.3+Last updated: July 1, 2026

Stack Stitch includes a minimal LGPL-only FFmpeg build for Calls audio muxing. This page provides the required third-party notice, build configuration, and source information.

Stack Stitch for macOS bundles an ffmpeg executable in Stack Stitch.app/Contents/MacOS/ffmpeg. It is used only to mux Calls audio into an .m4a file.

Bundled component

ComponentFFmpeg

Version7.1.1

LicenseLGPL-2.1-or-later

PurposeCalls audio muxing

License posture

This FFmpeg build is configured without --enable-gpl and without --enable-nonfree. It links no external codec libraries. Audio is encoded with FFmpeg's built-in LGPL AAC encoder.

The exact files shipped with the app are available here:

Corresponding source

The complete corresponding source for the bundled FFmpeg is the unmodified upstream release identified below. Stack Stitch applies no source patches.

https://ffmpeg.org/releases/ffmpeg-7.1.1.tar.xz
SHA-256: 733984395e0dbbe5c046abda2dc49a5544e7e0e1e2366bba849222ae9e3a03b1

The LGPL-2.1 license text is included with the FFmpeg source distribution as COPYING.LGPLv2.1.

Replacement

Because this FFmpeg build is LGPL-only and dynamically linked only against system frameworks, users may replace the bundled ffmpeg executable with their own LGPL-compatible build.