学习使用Mediasoup，最好的方式自然是先看官方文档，以下将对mediasoup官网文档做简要翻译。
https://mediasoup.org/documentation/overview/
概述：
一个SFU接收来自端点的音频流和视频流，然后将它们转发给其他每一个端。每个接收端可以选择其接收的流和spatial/temporal 层。相比混合器或者MCU，该设计具有更好的性能，更高的吞吐量和更少的延迟。它具有高度的可扩展性，并且由于它不会转码或混合媒体，因此所需资源少得多。
由于端点可以分别获取其他端点的媒体，因此它们可以具有个性化的布局，可选择要渲染的流以及如何显示它们。
设计目标
mediasoup and its client side libraries are designed to accomplish with the following goals:
- Be a SFU (Selective Forwarding Unit).
- Support both WebRTC and plain RTP input and output.
- Be a Node.js module in server side.
- Be a tiny JavaScript and C++ libraries in client side.
- Be minimalist: just handle the media layer.
- Be signaling agnostic: do not mandate any signaling protocol.
- Be super low level API.
- Support all existing WebRTC endpoints.
- Enable integration with well known multimedia libraries/tools.
用例
mediasoup and its client side libraries provide a super low level API. They are intended to enable different use cases and scenarios, without any constraint or assumption. Some of these use cases are:
- Group video chat applications.
- One-to-many (or few-to-many) broadcasting applications in real-time.
- RTP streaming.