DVRs for IP cameras
Most IP cameras require connection (remote or wired) to the appropriate Registrar through which you can view the image live, and recording and corresponding video compression for storage and later playback. This device allows you to create monitor, consisting of cameras connected to the recorder, allowing convenient control of the entire system.
How to choose the right model?
The main parameters logger-the number of supported cameras and the resolution and the maximum number of recordable frames per second. The number of cameras depends on the generated system is to protect the house can be effective even when four cameras, but for industrial use, it is better to choose the Registrar with support for more cameras (even if at the beginning will not be all, the logger gives the possibility of extending the controlled area). And the resolution and recording speed to be adapted to the needs of the system (hard wizyjna the plant requires better parameters than the supervision of the Parking lot), in the first place, please refer to the detailed specifications indicated by the manufacturer, because the values are often different for different number of connected cameras. You should pay attention to the supported memory (often one or two hard drives of large capacity), compression type (defines the quality ratio to the amount of occupied space), video output (VGA and HDMI, and some models also have RCA), audio output (for cameras that record picture and sound), and the presence of USB ports (to copy data). Most DVRs for IP cameras compliant with Onvif 2.4, it can support almost all camera models available on the market.
You should pay attention to models that offer flexible browsing capabilities - for example, through a web browser or app on a smartphone. The Registrar must also ensure the quick search and rewind recordings, and preview in single or multiple cameras simultaneously. It is a very useful remote access in the cloud P2P, as well as support functions such as motion detection, detection of shielding of the camera or talking about the lack of connection with the camera. Also, you should choose a Registrar to set the desired recording interval and auto-backup. Some models have the ability to integrate with a large number of registrars, which is very useful in large systems that support multiple cameras.