face recognition by cctv footage

Hello, I’m trying (well, more like being forced by work 😅) to build a face recognition system. The footage comes from CCTV cameras, and the people I need to identify are employees, so I already have photos of each person. I’m currently using DeepFace, but I’m running into a few problems. The image quality from the CCTV footage isn’t great, and I’m not sure whether I should use the existing photos of each employee as the reference images (they’re much higher quality than the CCTV footage), or whether I should also collect images from the CCTV footage and use those as references. I also believe