We have built a low latency 5g Video camera for race cars using linux and WebRTC.

We use RTCP (RTP's companion protocol) to help cope with the variability in quality and bandwidth of a 5g connection.

The talk will describe the problems we encountered, how we used data from RTCP to solve them. We will present experimental data from tests run with and without RTCP at varying speeds (30->160km/h).

We will also describe the opensource java (S)RTP/RTCP library we developed and used for this work https://github.com/steely-glint/srtplight as well as an LGPL demo program that uses srtplight implement the WebRTC based WHIP protocol (https://github.com/pipe/whipi)