libdatachannel VS janus-gateway

Also: https://github.com/paullouisageneau/libdatachannel (C/C++)

A number of open-source projects also exist, which give developers a great head start if they're looking to build their own infrastructure - the most popular of these include Jitsi, Mediasoup, Janus, and Pion. These projects provide a layer of abstraction and expose a number of helper functions to perform various tasks, such as creating transports, etc. They have helpful guides on how to get started, but you would still face the aforementioned issues regarding scaling, resources, etc.

This all changes when you are actually a domain expert: You can treat the various components as a "white box" because you see the forest for the trees and can make cross-cutting assumptions which will inherently make the code faster. I've noticed a lot of projects written by domain experts are often these giant clusterfucks of C that violate pretty much every guideline there are so many Medium blogs about, and yet they're very stable and widely used. See: https://github.com/meetecho/janus-gateway for example.

Yes, there are many self-hosted options out there. https://github.com/meetecho/janus-gateway works well for multi-party video with up to about 15 users in a room assuming everyone has a reasonably reliable connection.

- Janus (C / C++)

You can also take a look at https://github.com/meetecho/janus-gateway which can help you implement the video call part (as well as more traditional rtc scenario)

You can try janus https://janus.conf.meetecho.com/