NVR User Manual
57
Appendix B Calculate Recording Capacity
You can calculate the size of hard disk according to the storage time and NVR recording
settings. The formula is as follows in full frame rate condition. Used space per hour (MB/h) =
Bitrate(kbps)
÷
8
×
3600
÷
1024. The below are the details at different settings.
Resolution
Frame Rate
Bit Rate (kbps)
Used Space(MB/h)
1080P 15fps
(NTSC)
12M 2700
8M 2025
7M 1575
5M 1350
4M 900
720P 30fps
(NTSC)
6M 2700
4M 1800
2M 900
1M 450
256 113
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 sets resolution to1080P, frame rate to 15fps, bitrate to 4M and
enables total 4 channels. He wants the unit to record continuously in a month. Below is the
calculation:
Total Recoding capacity =900 (mb/h) X 24(hours/day) X30(days) X4 (channels)= 2592000
(MB)=2531.25(GB)
Therefore, customers just install two SATA HDDs with 1.5TB for one month recording.