Open Source Licenses
Last updated: April 12, 2026
Cue is built with the help of many open-source software components. We are grateful to the communities behind these projects. This page lists the major components and their respective licenses.
FFmpeg
Cue uses FFmpeg for video and audio processing. FFmpeg is licensed under the GNU Lesser General Public License v2.1 (LGPLv2.1).
FFmpeg is loaded as a separate WebAssembly module at runtime and is not statically linked into Cue's source code. Cue does not modify FFmpeg's source code.
The source code for FFmpeg.wasm is available at: github.com/ffmpegwasm/ffmpeg.wasm
Full license text: GNU LGPLv2.1
Symphonia
Cue uses Symphonia for audio decoding (AAC, PCM, Vorbis/OGG). Symphonia is licensed under the Mozilla Public License 2.0 (MPL-2.0).
Symphonia is compiled into a WebAssembly module for audio waveform generation. The source code is not modified by Cue.
Source code: github.com/pdeljanov/Symphonia
Full license text: Mozilla Public License 2.0
Additional Open Source Components
The following software is used under permissive open-source licenses (MIT, Apache-2.0, ISC, BSD). These licenses allow free use, modification, and distribution.
State Management & Collaboration
UI & Styling
Database & Infrastructure
AI
Complete Dependency List
This page highlights the most significant open-source components. For a complete list of all dependencies and their licenses, please refer to the project's package manifest files or contact us at legal@playcue.ai.
Contact
If you have questions about the open-source components used in Cue, please contact us:
Cue
Email: legal@playcue.ai