mediasoup v3 Design

Unlike other existing SFU implementations, mediasoup is not a standalone server but an unopinionated Node.js module which can be integrated into a larger application:

const mediasoup = require("mediasoup");

Thus internally, mediasoup can be splitted into two separate components:

• a JavaScript layer exposing a modern ECMAScript API for Node.js, and
• a set of C/C++ subprocesses that handle the media layer (ICE, DTLS, RTP and so on).

Both components communicate to each other by means of inter-process communication. However, from the point of view of the developer, the application should just care about the JavaScript API integration.

Features

• ECMAScript low level API.
• Multi-stream: multiple audio/video streams over a single ICE + DTLS transport.
• IPv6 ready.
• ICE / DTLS / RTP / RTCP over UDP and TCP.
• Simulcast and SVC support.
• Congestion control.
• Sender and receiver bandwidth estimation with spatial/temporal layers distribution algorithm.
• Extremely powerful (media worker subprocess coded in C++ on top of libuv).

Architecture