While primarily known for streaming, OBS Studio is a world-class multiviewer. It allows you to create a "Multiview" projector that displays all your scenes and sources on a single monitor for real-time production monitoring. Open-source vs proprietary software - Nebius
If you are looking for software that follows "open standards" (often confused with open source), professional systems like those from Grass Valley or Evertz use and NMOS . This ensures that their multiviewers can "plug-and-play" with any other vendor's IP equipment without being locked into a proprietary ecosystem. 4. Specialised Security Monitoring
Extensive support for almost any IP camera and highly granular control over motion detection and recording alongside the live view. 4. VLC Media Player
You can launch multiple VLC instances via command line or use "VLC Mosaic" configurations (VLM) to combine streams into a single window. 🛠️ Key Open-Source Components for Custom Builds