These units may also have limitations in capacity, not due to lack of space inside the unit, since hard drives keep on growing in storage capacity, but in terms of what the embedded software can recognize. The embedded systems are simplistic and inaccessible other than configuration capabilities (usually an open-source version of Linux). You may have ONVIF compliance using MJPEG for video and limited to PTZ functions but incapable of using the audio and edge storage functionality.Ī self-contained DVR has an operating system that is PC-based or uses an embedded proprietary operating system. The ONVIF standard has made possible interoperability between cameras and DVRs, only if the camera and DVR are 100% ONVIF compliant.
Each camera uses a unique codec for video encoding and a software driver for PTZ and edge storage (memory card) compatibility.
A hybrid DVR may also include the capacity to accept IP cameras by adding the encoding function within the software.
Caputo, in Digital Video Surveillance and Security (Second Edition), 2014 DVRĪny DVR is really just a computer with hard drives, including a video encoder with coaxial ports for analog cameras.
