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Open source

Licences and source offer for Zap · Sold by David Faux

Zap uses FFmpeg and AetherEngine under the LGPL. The source code for these libraries, and our build scripts, are linked below.

This page lists every open-source component that ships in Zap. The full licence texts are also in the app, under Settings > Legal.

Components

AetherEngine 7.62.0

Licence
LGPL-3.0 with App Store exception
Copyright
Copyright (C) 2026 Vincent Herbst
Source

Linked statically, under its App Store exception.

FFmpeg n8.1.3

Licence
LGPL-2.1-or-later, with local patches
Copyright
Copyright (c) the FFmpeg developers.
Source

Linked as dynamic frameworks. Built by FFmpegBuild 3.14.0: libavcodec, libavformat, libavutil, libswresample, libswscale and libavfilter.

dav1d 1.5.4

Licence
BSD-2-Clause
Copyright
Copyright © 2018-2019, VideoLAN and dav1d authors
Source

zimg 3.0.6

Licence
WTFPL
Copyright
Copyright (C) 2004 Sam Hocevar
Source

libzvbi 0.2.46

Licence
LGPL-2.0-or-later, conveyed under LGPL-2.1
Copyright
Copyright (C) the libzvbi authors. Local changes Copyright (C) 2026 Vincent Herbst.
Source

libzvbi regular expression matcher (ure.c)

Licence
MIT
Copyright
Copyright 1997, 1998, 1999 Computing Research Labs, New Mexico State University
Source

libdovi 3.4.0 (dolby_vision crate from dovi_tool)

Licence
MIT
Copyright
Copyright (c) quietvoid and contributors. Packaging Copyright (c) 2026 Vincent Herbst.
Source
Licence texts

The licence texts for every component are also in Zap, under Settings > Legal.

AetherEngine App Store exception

AetherEngine 7.62.0 is licensed under the LGPL v3 with this additional permission from its copyright holder, quoted in full:

As an additional permission under Section 7 of the GNU General
Public License v3 (and, where this license is the GNU Lesser
General Public License v3, by reference through Section 4 of
LGPL v3 incorporating GPL §7), the copyright holder grants
permission to distribute, install, and use this Program — and
any modified versions thereof — through application stores and
beta-distribution platforms operated by third parties (including
but not limited to the Apple App Store and Apple TestFlight),
even where the platform's terms impose restrictions on:

  - signing or re-signing of the binary by anyone other than
    the original developer or the platform operator;
  - tamper protection, FairPlay-style DRM, or similar
    integrity controls applied to the binary by the platform;
  - end-user redistribution of the installed binary outside
    the platform's own channels;
  - end-user re-linking of the installed binary against
    modified versions of the Program,

even where such restrictions would otherwise be incompatible
with Sections 4-6 of GPL v3.

This permission applies solely to the binary distribution path.
It does not waive any obligation under this License regarding
the source code: the complete corresponding source for the
Program (including any modifications) remains available at the
upstream public repository, and recipients retain every right
granted by GPL v3 (or LGPL v3) with respect to that source —
they may obtain it, study it, modify it, build their own copy,
and distribute their modified version under the same license,
outside the constraints of any application store.
Written offer for source code

For three years after each release of Zap, David Faux will send the corresponding source code of the LGPL-licensed components on request. Write to legal@davidfaux.com.

The terms of use do not restrict the rights that these licences give you.