I am admitting to struggling with this process. I've reviewed countless posting and YouTubes on setting up NDI camera in vMix. I'm not getting it.
Here's what I'm working with. vMix 23.0.0.66. Using a PTZOptics 20x camera setup using NDI. I can ping it. See it in the PTZ software. It is on the same network. Nothing that I can see is blocking it. When I open vMix and add an input. I select the NDI option on the left nav panel. The camera is never found. The circle continue to spin and nothing every shows up. The NDI capture desktop screen are showing, but no camera. What is wrong? I've tried to add the camera using the camera tab, but nothing works.

I'd suggest you test the NDI source by trying to view it in something else like NewTek's NDI Studio Monitor. If you can't view it there either then it's something at the camera end and not with vMix.

Thank you for your response. I can see it in the PTZ Control app with no problems. That has to use a NDI setup. It can find the IP Address and connect. Is that a good test?

Thank you Mavik. You were helpful in helping me to look in the right direction. This was a difficult situation to troubleshoot as there are three different vendor's products involved. I call the PTZOptics support people. They were simply wonderful, very professional and helpful. We had to manually add the camera to the NDI tools. Once manually added I was able to see the camera's feed in NDI Studio Manager and also vMix now showed the camera in the NDI selection when adding a new input. It's a wonderful thing.

For those who might need the steps here ya go. Using the NDI tool Access Manager open the Remote Sources tab. Add a new device. Select the camera type, provide the IP address. Set a name to anything you like. Select OK. Than OK to exit. Yes that simple. Takes less than one minute.They also reviewed some of the settings but all the default settings were used. So if you've changed those you might benefit by resetting all the values to default.