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EN
CCTV
Appendix B Calculate Recording Capacity
Users can calculate the size of hard disk according to the saving time and DVR recording settings. The DVR uses fixed video
bit rate. The below are the details at different settings.
Video
Format
Resolution
Frame Rate
Totally(FPS)
Video Quality
Bit Rate
(kbps)
Used Space(MB/h)
NTSC CIF 30
Highest 2M 915
Higher 1.5M 700
Medium 1M 465
Low 768K 297
Lower 512K 241
Lowest 256k 115
PAL CIF 25
Highest 2M 910
Higher 1.5M 712
Medium 1M 468
Low 768K 297
Lower 512K 241
Lowest 256K 112
The calculation format is: Total Recording capacity =Used space per hour (MB/h) (coverage rate of hard disk) × recording
time (hour) ×channel numbers
For instance, one customer uses PAL cameras, set resolution to CIF, video quality to Lowest, frame rate to 25 fps for enabling
total 16 channels. He wants the unit to record continuously in a month. Below is the calculation:
Total Recoding capacity =112 (mb/h) X 24(hours/day) X30(days) X16(channels)= 1290240(MB)≈1260(GB)
Therefore, customers just install one SATA HDD with 1.5TB, it can almost record for one month.
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