FFmpegdetails
The encoder underneath nearly everything else, and a capable streamer alone.
Not display-server dependent
apt · dnf · pacman · zypper · Nix
Encoding & streaming
Encoders, broadcast software and restreaming.
OBS Studiodetails
The broadcast software almost every Linux stream is built on.
Partial Wayland support
Flatpak · apt · dnf · pacman · zypper · Nix