SFU (Selective Forwarding Unit)

An SFU (Selective Forwarding Unit) is a server used in video conferencing to efficiently manage multiple video streams. Instead of mixing or processing all videos locally, it receives individual streams from each participant and selectively forwards only necessary video feeds to others. This approach reduces bandwidth and processing load, enabling smoother calls with many participants. The SFU helps maintain video quality by forwarding multiple streams directly, allowing each participant's device to decide which videos to display. It's like a central hub that ensures everyone gets the right video feeds without overwhelming the system.