Stellar Download Manager — Third-Party Software Notices
========================================================

This file lists the third-party software components used by Stellar Download
Manager, their licenses, and where to obtain their source code.

------------------------------------------------------------------------
1. FFmpeg
------------------------------------------------------------------------

Stellar optionally locates and invokes the FFmpeg executable to merge
video and audio streams when downloading from video-hosting sites.
Stellar does NOT distribute FFmpeg; it is a separate program that the
user installs independently.  If your copy of Stellar was bundled with
an ffmpeg.exe binary, that binary is an unmodified, official FFmpeg
build and is governed by the licenses described below.

FFmpeg is a trademark of Fabrice Bellard.
Copyright (C) 2000-present the FFmpeg developers.
Website: https://ffmpeg.org/

FFmpeg is distributed under the following licenses (your build may use
one or more of these, depending on which codecs and libraries it was
compiled with):

  • GNU Lesser General Public License version 2.1 or later (LGPL-2.1+)
    Full text: https://www.gnu.org/licenses/old-licenses/lgpl-2.1.html

  • GNU Lesser General Public License version 3 (LGPL-3)
    Full text: https://www.gnu.org/licenses/lgpl-3.0.html

  • GNU General Public License version 2 or later (GPL-2+)
    Full text: https://www.gnu.org/licenses/old-licenses/gpl-2.0.html

  • GNU General Public License version 3 (GPL-3)
    Full text: https://www.gnu.org/licenses/gpl-3.0.html

An FFmpeg build is GPL-licensed if it was compiled with any GPL
component (e.g. libx264, libx265).  A build is LGPL-licensed if it
was compiled without GPL-only components.  To determine which license
applies to the ffmpeg.exe on your system, run:

    ffmpeg -version

and look for "configuration:" in the output.  Any option containing
"enable-gpl" or "enable-nonfree" indicates a GPL build.

FFmpeg source code for official releases is available at:
    https://ffmpeg.org/download.html
    https://git.ffmpeg.org/ffmpeg.git

As required by the LGPL, users of Stellar are free to replace the
ffmpeg.exe binary with any other LGPL-compliant build of FFmpeg.
Because FFmpeg is invoked as a separate executable (not linked into
Stellar), no recompilation of Stellar is required to do so.  Simply
replace the ffmpeg.exe file in the same directory as yt-dlp.exe or
ensure a different ffmpeg.exe is earlier in your PATH.

------------------------------------------------------------------------
2. Qt Framework
------------------------------------------------------------------------

Stellar is built using the Qt framework version 6.

Qt (open-source edition) is Copyright (C) The Qt Company Ltd.
Website: https://www.qt.io/

Qt is used under the GNU Lesser General Public License version 3
(LGPL-3) with the Qt LGPL exception.
Full text: https://www.gnu.org/licenses/lgpl-3.0.html
Qt exception: https://www.qt.io/licensing/open-source-lgpl-obligations

Qt source code is available at: https://code.qt.io/

------------------------------------------------------------------------
3. libtorrent
------------------------------------------------------------------------

Stellar uses libtorrent (Rasterbar) for BitTorrent protocol support.

libtorrent is Copyright (C) Arvid Norberg and contributors.
Website: https://libtorrent.org/
Source code: https://github.com/arvidn/libtorrent

libtorrent is distributed under the BSD 3-Clause License.
Full text: https://opensource.org/license/bsd-3-clause

------------------------------------------------------------------------
4. SQLite
------------------------------------------------------------------------

Stellar uses SQLite (via Qt's QtSql module) for persisting download
history and queue data.

SQLite is in the public domain.
Website: https://www.sqlite.org/
Copyright notice: https://www.sqlite.org/copyright.html

------------------------------------------------------------------------
5. Stellar itself
------------------------------------------------------------------------

Stellar Download Manager
Copyright (C) 2026 Ninka_

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, version 3.

Full text: https://www.gnu.org/licenses/gpl-3.0.html
Source code: https://github.com/Ninka-Rex/Stellar

------------------------------------------------------------------------