: These are video compression standards. H.265 (HEVC) is newer and more efficient, allowing for higher resolution video with less bandwidth.
A new stable version of the system firmware, , is now available for download. This update applies to a wide range of Digital Video Recorders (DVR) and Network Video Recorders (NVR) utilizing both H.264 and H.265 video compression standards.
If your recorder currently displays "H.264" in the system info, do not download firmware that claims "H.265 upgrade" unless the manufacturer's release notes explicitly state compatibility.