User guide

DETEXI NVR 19 - 169
Recording
1. Recording Rules
One of the key functions in the DETEXI NVR is recording video.
Recording functionalities include setting up the rules of recording as well
as intelligent ways of searching for recorded video and exporting video
to other systems.
• In the DETEXI NVR video can be recorded on schedule
(24/7 or other) with or without motion detection and on
trigger (by motion or alarm). Scheduled recording can
combine both continuous and triggered recording instructions
(within schedule). Continuous recording normally uses more
disk space than an alarm triggered recording. An alarm-
triggered recording can be activated by, for example, video
motion detection or an external input through a camera’s input
port.
• With scheduled recordings, timetables for both continuous and
alarm or motion recordings can be set.
• After selecting the type of recording method, the quality of the
recordings can be determined by selecting the video resolution, and level of image compression.
These parameters, as well as frame rate, will affect the amount of bandwidth used as well as the
size of storage space required. The number of frames per second can be set in all recording
modes.
9 Network video products can have varying frame rate capabilities, depending on
the resolution. Full-motion video is 30 frames per second in NTSC video standard
(in North America and Japan) and 25 frames per second in PAL video standard (in
Europe). Some network cameras have the capability to do even higher frame
rates.
2. NVR Storage System
The DETEXI NVR uses the standard Windows file system for storage, so any system drive or network
attached drive can be used for storing video. An index of available video is stored in a separate file.
The advantages of using a database for storing all settings and recording metadata, and using a file
system, include:
• The ability to manage shared access and ensure data integrity
• The possibility to efficiently search for recordings
• The ability to enable direct file access and record directly to disk
The NVR can enable more than one level of storage — that is, recording on a primary hard drive and
archiving on local disks, network-attached drive, or remote hard drive. Users are able to specify how long
images should remain on the primary hard drive before they are automatically deleted or moved to the
archive drive.