A tool I wrote a few years ago that extracts motion clips from videos, completely free and open source. I released this as a CLI-only program a few years ago, but just updated to have a new GUI. This is the first GUI program I've personally shipped, so I'm excited to hear any feedback.

Works on all platforms anywhere Python is installed with: pip install dvr-scan[opencv]

Windows installer/builds are also available above. Feedback is welcome! https://github.com/Breakthrough/DVR-Scan

One constraint I gave myself was that the GUI had to be completely done with tkinter since it comes with most Python distributions, and avoid bringing in too many extra dependencies. The software aims to be able to run on low-end systems with ease, and tries to have as little dependencies as possible.