There are several ways to pull the video feed from a PTZoptics camera into vMix.
Section 1: General vMix adding inputs
Below is a very helpful video from vMix on how to add a camera to your live stream and an overview on how the different methods are performed .
Section 2: USB 3.0, HD-SDI, HDMI.
In this video Andrew Chatfield lead support engineer, walks through how to integrate PTZOptics cameras with vMix. You can simply plug the camera into your computer running vMix with a USB Cable. You can also use a frame grabber to convert HDMI or HD-SDI to a USB and connect to your computer.
Section 3: Pulling in IP video
Below is a video demonstrating how to pull IP video Into vMix.
Please note: this will require you to have the computer and the camera on the same subnet. If you have not yet set the camera's IP address to be on your network range please refer to the guide HERE.
As you can see above we have selected "Stream" for our input and typed in our the URL as "rtsp://192.168.1.88/1" which is Tom's PTZOptics camera he has selected. Now once you click "OK" the camera feed will be available as a input.
Finally, if you have an NDI model camera or a camera that you purchased an NDI license for, you are able to pull the camera in as an NDI source.