All about the DVR
When you purchase a set of surveillance cameras for your business or for your home, it is good to understand that it is not enough to have just the cameras. Besides this, it is necessary to have a dvr.
What is the dvr? It is the device that records in real time all monitors surveillance cameras. He represents the core of a video surveillance system, constituting an important component for this.
If you need a DVR that has a larger number of input channels to support multiple video camera or if you need a DVR with large space for storage on your hard-disk or one specifically designed for remote monitoring, you just have to take care of what you need.
DVR analog offers inputs for a total of 4, 8 or 16 cameras. It is all very well but to choose a DVR with more channels than you need, because you can offer the flexibility to add the camera to surveillance systems in case it is needed.
DVR hybrid can use existing analog cameras and can move to a security solution IP or HD. The DVR must have the inputs depending on your needs.
The frame rate is the number of frames a DVR can record every second at a resolution determined. A rate lower register a move me a little more realistic, allowing the DVR to record video for longer periods of time, with less processing power and storage, and the upper rate hold moves more detailed, realistic and require more processing power and storage.
Many DVRS provides protection against overwriting and stop automatically when the storage space becomes insufficient.
Some DVRS video surveillance based on inputs and outputs of the alarm that you can integrate to an alarm system existing. These connections can be combined with the functions of motion detection or loss offered by a video surveillance system. Motion detection will allow you to predefined areas to each camera and to program the camera to record when the movements are detected within the field selected. This function allows saving the video storage optimization video, e-mail notification or warning in the event of an incident.
Most DVRS have the ability to record and audio, allowing you to add a microphone of high quality or to use little microphones embedded in the camera.
Advisable is to have enabled a password, and the DVR to be located in a room special, well-secured or in a safe to prevent unauthorized access to the video material recorded. Also, a cover can help to protect your equipment against disturbance accidental.
Desirable would be to connect the DVR and cameras to a power source, uninterruptible power(UPS) to prevent recordings staple and to protect against blackouts. Check frequently the sources of supply to ensure that the battery is fully charged and not displaying the warning lights.
DVRS modern have the ability to view and manage your video surveillance system, from a distance. With this function, it is possible to view the video on the internet or through a smartphone app, from anywhere in the world.
Some DVRS have a feature to download easy video. The data downloaded is important evidence for the agencies of law enforcement or other organizations when necessary in the case of a crime.
The storage capacity of the DVR is very important for the applications of a video surveillance system, having, often, requirements considerable for storage. That’s why, there are a few things to consider regarding storage space, when you want to choose a DVR for a video surveillance system: the number of days of required video storage, number of cameras, resolution, recording, hours / days of registration weekly, FPS and compression of the video, I mean the process by which a film is shrunk enough that they can see the details in the images.