DVR listens on UDP:8899
$ ss -lnup sport = :8899
UNCONN 0 0 0.0.0.0:8899 0.0.0.0:* users:(("channels-dvr",pid=477,fd=108))
In the past it was trying to start fakejour(?) on that port
2022/09/04 16:11:56.490988 [ERR] Failed to start fakejour: listen udp 224.0.0.224:8899: setsockopt: no such device