DVR User Manual
99
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)
PAL
D1
25
Highest
2M
915
Higher
1.5M
700
Medium
1M
465
Lower
768K
297
Lowest
512K
241
NTSC
D1
30
Highest
2M
910
Higher
1.5M
712
Medium
1M
468
Lower
768K
297
Lowest
512K
241
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 D1, video quality to Higher, frame rate to 25 fps for enabling
total 4 channels. He wants the unit to record continuously in a month. Below is the calculation:
Total Recoding capacity =700 (mb/h) X 24(hours/day) X30(days) X4(channels)= 2016000(MB)≈2016(GB)
Therefore, customers just install two SATA HDDs with 1000GB, it can almost record for one month.
