Q-See QT5116 User Manual - page 87
APPENDIX B: RECORDING CAPACITY
QT518/QT5116 User Manual
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APPENDIX B: CALCULATE RECORDING CAPACITY
Users can calculate the hard drive size needed according to the time saving specification and DVR recording settings
listed below. Below is an estimated table outlining hard drive space used when the DVR is configured at various
settings.
VIDEO
FORMAT
RESOLUTION
FRAME RATE (FPS)
VIDEO
QUALITY
BIT RATE
(kbps)
SPACE USED
(MB/h)
PAL
CIF
25
Highest
640
281
Higher
512
225
Medium
384
168.7
Lower
256
112.5
Lowest
128
56
NTSC
CIF
30
Highest
640
281
Higher
512
225
Medium
384
168.7
Lower
256
112.5
Lowest
128
56
The calculation format is:
Total Recording capacity =Used space per hour (MB/h) (coverage rate of hard drive) × recording time
(hour) ×channel numbers
For instance, one customer uses NTSC cameras, set resolution to CIF, video quality to Lowest, frame rate to 30
fps for enabling total 16 channels. He wants the unit to record continuously for a month. Below is the calculation:
Total Recoding capacity =56 (mb/h) X 24(hours/day) X30(days) X16(channels)
= 645120(MB)
≈650(GB)
Therefore, customers who install only one SATA HD with 750GB can expect to achieve almost one month of
recording time.