The frames per second (fps) is a measurement of how many pictures are displayed during one second. Real time recording is about 30 fps on a camera, which translates to 30 pictures each second. The total video input FPS would equal the total FPS received by all channels. Then, the FPS on each channel is calculated by dividing the total DVR FPS with total channels. For example, a 30 fps digital video recorder with 2 video channels would result in average about 15 fps per channel.