DVR User Manual
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.
Resolut
ion
Frame Rate
Totally(FPS)
Video Quality
Bit Rate
(kbps)
Used
Space(MB/h)
1080P
25(PAL)/
30(NTSC)
Highest
12M
5400
Higher
9M
4050
Medium
7M
3150
Low
6M
2700
Lower
4M
1800
Lowest
1.5M
675
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 NTSC cameras, set resolution to 1080P, video quality to
Lowest, frame rate to 30 fps for enabling total 4 channels. He wants the unit to record
continuously in a month. Below is the calculation:
Total Recoding capacity =675 (mb/h) X 24(hours/day) X30(days) X4(channels)= 1944000
(MB)≈1898(GB)
Therefore, customers just install two SATA HDDs with 1TB, it can almost record for one
month.
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