We have four cameras, one is NDI but three of them feed RTSP to our vMix so you can definitely get the video from the camera.

Note that vMix prefers NDI input so if your camera support it use that as your first choice and your JVC camera should also support SRT which is a more reliable protocol than RTSP but vMix doesn't play well with SRT inputs (locks up when shutting down vMix).

If the camera supports PTZ over the network then it's likely vMix supports it but check their supported cameras list anyway https://www.vmix.com/sof...ardware.aspx#ptz-cameras .