No Homekit stream for one specific Ring Floodlight cam

[ceeeekay]

Hi all, I have 5 Ring cams on my account and they've all been working great in Homekit until a while ago.

One of the cams has stopped providing a stream to Homekit, and unfortunately it's the one we need the most.

Attempting to open a stream from Homekit gives me the following in the Scrypted console:

SIP prebuffer session ended with error s [Error]: stream ended
[...]
client error Error: This socket has been ended by the other party

I can get a steady live video feed from the camera page in Scrypted, so that whole route is working.
Network connectivity is also good - one of my APs is right near that camera (about 10 feet away).
Homekit motion notifications and snapshots for this camera are also working, just not the Homekit Livestream.
All the other four cameras have no issue starting a stream from Homekit.
The stream error occurs on every device I've tried (ATV, macbook, phone).

Steps I've taken to try and resolve this:

• Restarted the camera (of course)
• Checked Scrypted camera settings against one of the other working Ring cams
• Deleted the camera from scripted and re-authed the plugin with Ring to re-add the camera (and re-added to Homekit)
• Reinstalled the Ring plugin
• Upgraded Scrypted through several versions
• Checked the plugin troubleshooting, which says it's a network issue, however I don't believe that's the case here (stream is solid in scrypted, and other cameras on the same network are working)
• Tested the camera on a different IP (it uses a DHCP static)
• Possibly some other troubleshooting steps I'm forgetting

What can I do from here? I'm drawing a blank.
Thanks.

Scrypted Version 0.111.0

[ceeeekay]

FFS, this is a perfect example of "Finally ask for support, and then immediately figure it out for yourself".

The Ring plugin had Legacy RTSP Streaming selected, but I have no idea why.

Unchecking this and reloading the plugin has solved the issue.

FWIW the problem camera is newer than the rest - it's a Floodlight Pro, so this somewhat makes sense now.