I know I might be late to the party, but if you are looking for ways to get images from your Jai camera into OpenCV, we usually recommend to take care of the acquisition through the CVB API and then pass over the CVB image to OpenCV. OpenCV has no GenICam interface and won’t interface out of the box to GEV or U3V cameras that expect to be addressed through that protocol.
A description of how to transfer the image vom CVB to OpenCV efficiently is mentioned in https://forum.commonvisionblox.com/t/lib-bridge-cvb-to-opencv/1042 (search for CVBInterop).