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User’s Manual
DVR-4TH/8TH/16TH Series
SPECO TECHNOLOGIES 07/10
147
Appendix C: Record Duration
The record duration relates to recording rate, image quality, HDD capacity, and event
settings. The following tables give sample calculation of record duration according to
different recording rate, image quality, and HDD capacity, excluding consideration of events,
for different models with different recording mode. The recording quality refers to the
Normal Qlty
setting of <Per Camera Config> in <Record Setting>, assuming all channel
are set to the same quality at all times.
Per Camera Config
Cameral Select
Normal PPS
Normal Qlty
Event Max PPS
Event Qlty
Event Act
Day
7.5
Mid
30
Best
Both
Night
7.5
Mid
30
Best
Both
CH1
Weekend
7.5
Mid
30
Best
Both
NOTE: Record duration times are based on actual tests and represent average file
sizes. Performance may vary depending on specific installations and use. Audio
recording requires 8 KB per second (or 0.7 GB per day) for data storage.
Please refer to our recording time calculator on the Speco website for other possible
calculations. http://www.Specotech.com Æ Support Æ Tools
Refer to the following tables for some samples of estimated recording duration of different
record modes in H.264 compression.
Record Duration (Days): Full-D1, Global [Day, Night, Weekend] (without Audio)
Recording Rate Recording Quality Mode
Low Fair Mid High Best
Total PPS of all
Channels
NTSC PAL NTSC PAL NTSC PAL NTSC PAL NTSC PAL
NTSC PAL (8 KB) (8 KB) (12 KB) (12 KB) (16 KB) (16 KB) (20 KB) (20 KB) (24 KB) (24 KB)
160 GB Internal Storage
30 25 10.52 12.63 4.79 5.74 276 3.31 1.81 2.17 1.29 1.55
15 12.5 21.04 25.25 9.57 11.49 5.52 6.62 3.62 4.34 2.58 3.09
7.5 6.25 42.09 50.50 19.15 22.98 11.03 13.24 7.24 8.69 5.16 6.19
320 GB Internal Storage
30 25 21.56 25.87 9.81 11.77 5.65 6.78 3.71 4.45 2.64 3.17
15 12.5 43.12 51.75 19.62 23.55 11.31 13.57 7.42 8.90 5.28 6.34
7.5 6.25 86.25 103.49 39.24 47.09 22.61 27.14 14.83 17.80 10.57 12.68