Just running the start example I'm getting the following:
2019-03-26T20:21:49.058Z - info: RTSP server is running on port: 5554
2019-03-26T20:21:49.060Z - info: RTSP client server is running on port: 6554
2019-03-26T20:21:52.418Z - info: Set up mount at /stream1
2019-03-26T20:21:52.461Z - info: Setting up stream (0) on path /stream1
2019-03-26T20:21:52.506Z - info: Listener for Stream(0) on path /stream1 on port 10000 successful
2019-03-26T20:21:52.506Z - info: Listener for Stream(0) on path /stream1 on port 10001 successful
2019-03-26T20:21:56.343Z - error: Unknown server request {"method":"DESCRIBE"}
Just running the start example I'm getting the following: