How is mcu implemented in Jitsi? Is it a star topology with the server acting as a hub or a multipoint mesh?
It is not MCU it is SFU.
Thank you damencho . It it possible to modify SDP parameters in a quick installed instance ?
Some you can, as resolution you can find those in config.js. https://github.com/jitsi/jitsi-meet/blob/master/config.js
For others you need the source …