Newbie with lots of questions in General Digital Discussion Posted June 14, 2019 Purchased a house which has a couple of cameras already installed along with BCN cables run for additional cameras. The previous owners told realtor the system is only a year old. Found camera boxes, HD 1080P DSP infrared H.264. The DVR is missing. Can these cameras be used with a H.265 DVR and planning on adding more cameras. Can I mix the H.264 and H.265 cameras?