OBS Studio

Free software for video recording and live streaming

Free Video
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Users build scenes from cameras, screens, and graphics, and send them to platforms by RTMP or SRT. Plug-ins add NDI, virtual cameras, and more. It runs on Windows, macOS, and Linux.

It has no built-in AI, but plug-ins add background removal and captions.

vMix and Wirecast are paid alternatives. OBS Studio suits broadcasters and streamers.