Instruction Manual

DVR User Manual
60
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.
Resoluti
on
Frame
Rate
(FPS)
Video Quality
Bitrate (kbps)
Used Space
（MB/H）
D1
30(NTSC)
/25(PAL)
Highest
2M
900
Higher
1.5M
675
Medium
1M
450
Low
768
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 D1, video quality to Low,
frame rate to 30 fps for enabling total 4 channels. Below is the calculation to record
continuously for a month.:
Total Recoding capacity =338 (mb/h) × 24(hours/day) ×30(days) × 4(channels)=
973440 (MB) ≈950 (GB)
Therefore, customers just install one SATA HDD with 1TB for one month recording.