Are there instructions on how to turn this into a srt decoder?

Please check wiki: Stream - Encoder

And Introduction to the three modes (listener, caller, rendezvous) of the encoder SRT protocol

Q: How to receive and decode SRT streams

A: The URL rule of encoder is the same as ffmpeg format, for example, when we need to dock an encoder with ip=192.168.1.111,port=9001,mode=listener, the network input URL of decoder side should be filled in srt://192.168.1.111:9001?mode= caller and so on.

Ling Pai encoder can not only receive SRT streams, but also output SRT streams, please refer to “Introduction to the three modes (listener, caller, rendezvous) of the encoder SRT protocol” for details.