OBS Studio

OBS Studio is the industry-standard, open-source software for high-performance live streaming and video recording across Windows, macOS, and Linux.

Built for creators and broadcasters alike, OBS Studio delivers real-time video and audio capturing, compositing, and encoding directly to platforms like YouTube, Twitch, and Kick. The software utilizes a powerful scene-based workflow, allowing users to seamlessly switch between unlimited sources (including window captures, webcams, capture cards, and browser windows). With native support for hardware encoders like NVIDIA NVENC and AMD AMF, plus a massive ecosystem of community-built plugins, OBS Studio provides professional-grade production control without the enterprise price tag (it is completely free).

https://obsproject.com/