Digital video recorders (DVRs) record video onto hard drives or digital media instead of analog videotapes. They are capable of recording multiple feeds from different sources, including video cameras, computers, and TV sets. A DVR can have up to 16 different channels for simultaneous inputs. They are commonly used in surveillance and security applications, because they have longer recording times than traditional VCRs. They also allow videos to be transferred onto a computer for filing, backup, or playback.
Input ports: Choose a DVR with enough input ports to accommodate your source devices. Allow two or more ports for additional inputs if you plan to expand your system in the future. Make sure the ports are compatible with your input devices. Frame rate: Choose a DVR that records at 24 frames per second (fps), the standard frame rate for video playback. For recording fast action such as races and action games, look for a higher frame rate of about 30 fps.
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