sipsorcery 

Real-time communications library with full support for the Session Initiation Protocol (SIP) and WebRTC. No wrappers and no native libraries required.

A C# implementation of the WebSocket protocol client and server

Don't reference this package unless you are building a media end point to work with the SIPSorcery real-time communications library. In most cases a concrete implementation package such as SIPSorceryMedia.Windows should be referenced.

The SIPSorcery package for audio and video capabiltities.

Provides audio and video device access for Windows for use with the main SIPSorcery real-time communications library.

Provides audio and video encode and decode capabilities plus media end points that can be used with the main SIPSorcery real-time communications library.

Provides FFmpeg based audio and video media end points that can be used with the SIPSorcery real-time communications library.