H.265 (recommended) is the latest video compression standard to be supported by newer NVRs, especially for 4K video support. All current CCTV Empire products support this standard.
H.265+ is an enhancement of H.265 that slightly improves the compression. Some systems offer a separate H.265+ setting. Before selecting H.265+, make sure that your DVR/NVR system supports this setting.
H.264 is an older standard but is supported by almost all cameras it is an efficient video compression standard commonly used for HD video (720p and 1080p).
The frame rate is how many images per second your camera captures - for standard realtime choose 25fps, for the best compromise between storage and frame rate choose 12fps.
* This Surveillance Storage Estimator tool is provided for illustrative purposes only. Storage capacity needs may vary depending on actual number of cameras connected, days of storage required, video format, compression ratio, camera resolution, frames per second and other factors. Any reliance on this tool and its output is at the third party’s own risk. As used for storage capacity, one gigabyte (GB) = one billion bytes and one terabyte (TB) = one trillion bytes. Total accessible capacity on storage devices may vary depending on operating environment.