OBS

The industry standard for high performance real-time video capture, compositing, and live streaming.

OBS Studio (Open Broadcaster Software) is a C++ powerhouse used by millions to manage complex live productions. It handles unlimited scenes, seamless transitions, and low-latency encoding via x264 or hardware-accelerated APIs like NVENC. The software integrates directly with platforms like Twitch and YouTube through RTMP/RTMPS protocols. Its modular UI (Dock) and robust plugin ecosystem (including VST support and NDI integration) make it the primary choice for professional broadcasters and technical operators requiring granular control over audio-visual routing.

https://obsproject.com