Open-source notices

Last updated November 1, 2026

Nocturnal Studios runs these open-source programs as separate tools. Each is licensed by its authors under the license shown. You can get the source code for each one from the links below, or by emailing [email protected] and we will send it to you.

HandBrake (HandBrakeCLI)

Encodes the final video. Licensed under the GNU General Public License, version 2 or later. Website: handbrake.fr. Source code: github.com/HandBrake/HandBrake.

FFmpeg

Reads, converts and measures video. The build we include is a GPL build (GNU General Public License, version 3). FFmpeg: ffmpeg.org. Build source and details: gyan.dev/ffmpeg/builds. Source code: ffmpeg.org/download.html.

Blur

Adds motion blur. Licensed under the GNU General Public License, version 3. Source code: github.com/f0e/blur. It ships with other libraries and models, such as VapourSynth and RIFE, each under its own license, which you can find with those projects.

Real-ESRGAN (built-in upscaler)

Upscales video frames. The program (realesrgan-ncnn-vulkan) is licensed under the MIT License and the Real-ESRGAN models under the BSD 3-Clause License, by Xintao Wang and contributors. It is built with the ncnn library (BSD 3-Clause) and runs on your graphics card through Vulkan. Source code: github.com/xinntao/Real-ESRGAN-ncnn-vulkan and github.com/xinntao/Real-ESRGAN.

Electron and Chromium

The app window is built with Electron and Chromium, which are open source under permissive licenses. The full license texts are included with the app.

Your rights

These licenses let you use, study, share and modify those programs under their terms. They do not apply to the Nocturnal Studios app itself, which is a separate program that starts these tools. The license texts are available from the links above.