ZoneMinder

ZoneMinder is a mature, full CCTV and video management system for Linux. It captures, analyzes, records, and monitors footage from your cameras in one place, and has been in active use for surveillance setups of every size for over a decade.

It handles multiple cameras at once and supports IP, USB, and analog sources. Motion detection works through configurable zones, so you can ignore busy areas and record only where movement matters, alongside continuous recording when you want full coverage.

Clips are reviewed through a web interface, with H.264 and H.265 recording, event filters, and alerts to surface what is worth watching. A REST API exposes events and controls for integration with other tools and custom front ends.