Grandstream GVR3550 User Manual - Manual (Page 120)

Grandstream Networks, Inc. GVR3550 User Manual Page 120 of 120
Firmware Version 1.0.0.65 Last Updated: 10/2014
RECORD TIME CALCULATION
Please confirm the HDD has been installed when install the GVR3550 for the first time.
HDD Capacity formula is:
Total Space (M ) = The amount of cameras * Required Time(Hour)* The HDD space occupied per
hour（M/H）
From the formula above we could conclude the Record Time formula:
Record Time (hour )= Total Space (M)/The HDD space occupied per hour（M/H）*the amount of
cameras
The GVR3550 is equipped with MPEG4/H.264 compression technique, its dynamic range is quite large
thus the HDD capacity calculation requires assessing the file size recorded per hour in each camera
according to stream.
e.g.:
The record in one single camera takes up 2 MB/H per hour; use the GVR3550 to record with synchronous
12 cameras.
Record Time (hour）=2*4*1024*1024/200（M/H）*12=3495.25（Hour）

145.6（Day）