Third-Party Software Notices

Last updated: March 24, 2026

ScreenTinker uses the following open-source software components. We gratefully acknowledge the contributions of these projects and their maintainers.

Summary

Package	License	Use
Express	MIT	Web server framework
Socket.IO	MIT	Real-time WebSocket communication
better-sqlite3	MIT	SQLite database driver
Multer	MIT	File upload handling
uuid	MIT	Unique ID generation
Jimp	MIT	Image processing and thumbnails
@jsquash/webp, @jsquash/avif	Apache 2.0	WebP / AVIF encoding
FFmpeg (ffprobe, ffmpeg)	LGPL 2.1 or later	Video duration, dimensions and thumbnails. Bundled as unmodified binaries with the BrightSign player package only; built from unmodified FFmpeg 7.1.1 sources configured `--disable-gpl`, so no GPL component (including libpostproc) is included.
cors	MIT	Cross-origin resource sharing
bcryptjs	MIT	Password hashing
jsonwebtoken	MIT	JWT authentication tokens
Helmet	MIT	HTTP security headers
google-auth-library	Apache 2.0	Google OAuth verification
OkHttp	Apache 2.0	Android HTTP client
Gson	Apache 2.0	Android JSON parsing
AndroidX Media3 / ExoPlayer	Apache 2.0	Android video playback
AndroidX libraries	Apache 2.0	Android UI and lifecycle
Material Components for Android	Apache 2.0	Android UI components
Socket.IO Java Client	MIT	Android WebSocket client
Kotlin Coroutines	Apache 2.0	Android async operations
AndroidX Security Crypto	Apache 2.0	Encrypted SharedPreferences
AndroidX WorkManager	Apache 2.0	Background task management

MIT License

The following packages are licensed under the MIT License:

Express, Socket.IO, better-sqlite3, Multer, uuid, cors, bcryptjs, jsonwebtoken, Helmet, Socket.IO Java Client

MIT License Copyright (c) respective authors and contributors Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

GNU Lesser General Public License v2.1

The BrightSign player package bundles two FFmpeg command-line programs, ffprobe and ffmpeg, used to read the duration and dimensions of uploaded video and to generate thumbnails. They are built from unmodified FFmpeg 7.1.1 sources (ffmpeg.org) and are licensed under the GNU Lesser General Public License, version 2.1 or later.

They are configured with --disable-gpl, so no GPL-licensed FFmpeg component is present — including libpostproc, which is GPL-only. No FFmpeg source was modified.

Written offer. These binaries are statically linked. On request we will supply the complete corresponding source, the exact configure arguments used, and the object files needed to relink the programs against a modified version of the library, as section 6 of the LGPL requires. Contact [email protected]. The full licence text is at gnu.org/licenses/lgpl-2.1, and a copy ships beside the binaries in the player package.

Apache License 2.0

The following packages are licensed under the Apache License, Version 2.0:

@jsquash/webp, @jsquash/avif, google-auth-library, OkHttp, Gson, AndroidX Media3/ExoPlayer, AndroidX libraries, Material Components for Android, Kotlin Coroutines, AndroidX Security Crypto, AndroidX WorkManager

Apache License Version 2.0, January 2004 http://www.apache.org/licenses/ Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

Contact

If you have questions about the licensing of any component used in ScreenTinker, please contact us at [email protected]