
--- Calculate Recording Capacity---
Mobile DVR User Manual
71
Appendix
Appendix B Calculate Recording Capacity
Users can calculate the size of hard disk according to the saving time and MDVR recording settings. Below is an estimated table
outlining hard drive space used when the MDVR is configured at various settings.
Video Format
Resolution
Frame Rate Totally (FPS)
Video Quality
Bit Rate (kbps)
Used Space(MB/h)
NTSC
CIF
30
Highest
1M
465
Higher
768k
297
Medium
512k
230
Low
384k
173
Lower
256k
115
Lowest
128k
56
PAL
CIF
25
Highest
1M
466
Higher
768k
295
Medium
512k
235
Low
384k
175
Lower
256k
112
Lowest
128k
56.4
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 CIF, video quality to Lowest, frame rate to 25 fps for enabling
total 4channel. He wants the unit to record continuously in a month. Below is the calculation:
Total Recoding capacity =56.4 (mb/h) X 24(hours/day) X30(days) X4(channels) 162432(MB) ≈160 (GB)
Therefore, customers just install one SATA HDD with 160GB, it can almost record for one month.