FlowEncode Third-Party Licenses

This document records the third-party components and tools that FlowEncode may bundle, invoke, detect, guide users to install, or allow users to import manually.

FlowEncode's own source code is distributed under GPL-3.0-only. That license applies to this repository's source code, not to independent runtimes, NuGet packages, encoders, media tools, VapourSynth plugins, or user-installed tools. Each third-party component remains governed by its own license.

Bundled Or Build-Time Components

Component	Role	License / Terms
Monaco Editor	Bundled editor assets under FlowEncode/Assets/VapourSynthEditor/vendor/monaco	MIT
CommunityToolkit.Mvvm	MVVM helpers	MIT
Microsoft.Extensions.Hosting	Application hosting and dependency injection	MIT
SharpCompress	Archive handling	MIT
Microsoft.WindowsAppSDK	Windows app framework package/runtime	Microsoft license terms for the package and runtime
Microsoft.Windows.SDK.BuildTools	Windows SDK build tooling	Microsoft license terms
WebView2 Runtime / SDK surface	Runtime used by the editor host through Windows App SDK / WebView2 APIs	Microsoft license terms
MSTest packages	Test-only packages	MIT

Public External Toolchain

Component	Role	License / Terms
Python 3.12	Script runtime	Python Software Foundation License
VapourSynth / VSPipe	Script runtime and pipe output	LGPL-2.1
vsrepo	VapourSynth package helper	MIT
awsmfunc	VapourSynth helper package	MIT
vs-jetpack	VapourSynth helper package	MIT
VapourSynth plugins	User-installed processing plugins	Follow each plugin's own license
x264	Video encoder	GPL-2.0-or-later
x265	Video encoder	GPL-2.0 or commercial license, depending on distribution
SVT-AV1	Video encoder	BSD 3-Clause Clear
FFmpeg / FFprobe	Media processing and probing tools	LGPL/GPL, depending on build configuration
Av1an	Target-quality encoding orchestration	GPL-3.0
Avs2PipeMod	.avs input bridge	GPL-3.0

FlowEncode's setup guide currently supports automatic installation or updates for Python 3.12, VapourSynth / vsrepo related Python packages, the public VapourSynth plugin bundle, awsmfunc, vs-jetpack, FFmpeg / FFprobe, x264, x265, SVT-AV1, and Av1an. Other command-line tools are detected, pinned, or manually imported only.

Optional User-Supplied Tools

These tools are optional external binaries. FlowEncode may detect them from configured paths, the local tools folder, or PATH, and may allow users to copy a local binary into the app workspace. FlowEncode does not bundle them in the installer, download them automatically, or grant a license to use them.

Component	Role	License / Terms
DGDemux	Blu-ray / UHD Blu-ray demux backend	Upstream/distributor terms; user-supplied only
eac3to	Blu-ray demux and audio conversion backend	Upstream/distributor terms; user-supplied only
deew	Wrapper used by the DDP workflow	MIT
Dolby Encoding Engine / DEE	Dolby audio encoding backend used by deew	Proprietary Dolby component; user-supplied and separately licensed
Opus Encoder / opusenc	Opus command-line encoder	opus-tools terms; opusenc is covered by the three-clause BSD-style Opus tools license

Release Checklist

• Release assets do not bundle the repository LICENSE or this THIRD_PARTY_LICENSES.md file; these notices are maintained in the public repository.
• README and release notes must clearly distinguish automatically installable public toolchain components from optional user-supplied or manually imported binaries.
• README and release notes must not present locally supplied, private, non-open, unauthorized, proprietary, or license-unclear tools as bundled, auto-installed, publicly licensed, or granted-by-FlowEncode dependencies.
• Release notes must not include UI details, internal implementation details, build commands, validation output, test results, SHA256 values, checksum logs, or internal QA notes.