Dahua VTO2202F doorbell camera in Frigate?

I’m looking looking looking everywhere for the rtsp stream-URL’s for my doorbell camera, to configure it in Frigate …

I follow the instructions on
https://dahuawiki.com/Remote_Access/RTSP_via_VLC
but VLC gives an error

“VLC is unable to open the MRL ‘rtsp://admin:********@192.168.1.244:554/cam/realmonitor?channel=1&subtype=1’. Check the log for details.”

when I “angry-IP”-scan my LAN, I see that port 554 is actually open on this camera … so that should be fine …

the camera is working because I can see it in Synology Surveillance Station …
I also have an Onvif device in Home Assistant for this camera … and it’s working there as well …

But both Synology and HA seem to access the camera HTTP on port 80 (Onvif) but Frigate needs to access is be RTSP (port 554) … here seems to be the problem ?

what am I doing wrong ?