Specially designed digital video recorders (DVR's) have rapidly replaced the combination of time-lapse VCR's and multiplexers for recording video from multiple security cameras. Security DVR's are differentiated by their number of camera inputs (channels), video recording rate (measured in frames-per-second) and total storage capacity. Other features that distinguish security DVR's are their remote access capabilities, motion detection features, and video search tools.
Use this calculator to estimate total disk space needed for your security cameras.
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