I noticed a problem started for me when I upgraded to Prusaslicer 2.3. The reprap based gcode have deprecated m104 for heating hotend. So prusa implimented the g10 and now my printer starts moving but the hotend never gets turned on.
They retained a version called reprap/sprinter for backwards compatibility.
So I guess an update may be required for Duet to handle g10 the way the slicers expect it to be implemented???
Thanks for the help. Turns out the upgrade to 1.19.2 worked for streaming types of webcams. It probably would have worked with mjpeg streamer too since I think it's based on motion too.
Awesome. Thanks! I'll save my scripting for the z tracking 
I believe 1.18. I think the 1.19 for ultibots at the time was only for wifi. I have the ethernet version. I think I saw they have the newer version up now though. once I commission the heat bed which is all I have left, I'll try to upgrade.
I'm installing the motioneye remotely now too just to see how it works. The printer is off though when I'm not home.
I'll take a look at that. I thought when I tried to point it at my PI with the stream running, the interface had a message saying it need to be of a file type. Like it wanted something ending in .jpg. Thanks!
I had an idea and I figured I would throw it out here in case something already exists that I just didn't run across. I don't want to fight with Octopi since I can roll my own more specific solution.
Just built a D300VS+. I saw that I can embed an IP camera image in the Duet Web Control interface but it needs to be an image not a stream.
The solution I'm working on is mjpegstreamer running on a RPI. I'm going to create a script that will check the Web Control for heater 1 to go above 50C, then it will start the webcam streaming on 8080 and saving a snapshot every 5 seconds for the Web Control Interface until it goes back down below 50C.
I have a good bit of it already worked out and tested. After that I think I'm going to try to grab the Z height so I can make a servo move the camera up to track with the effector as the print progresses.
Thanks in advance, Rob.