DVR User Manual
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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.
Resolu
tion
Frame
Rate
Totally(FPS)
Video
Quality
Bit Rate
(kbps)
Used Space
(MB/h)
1080P
15(NTSC)/
12(PAL)
Highest
12M
2700
Higher
9M
2025
Medium
7M
1575
Low
6M
1350
Lower
4M
900
Lowest
1.5M
338
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 15 fps for enabling total 4 channels. He wants the unit to record
continuously in a month. Below is the calculation:
Total Recoding capacity =338 (mb/h) × 24(hours/day) ×30(days) × 4(channels)=
973440
(MB) ≈950 (GB)
Therefore, customers just install one SATA HDDs with 1TB, it can almost record for one
month.