The Storage Calculator is an interactive application designed to help you determine
the amount of hard drive space you will require to record video data based on the
selected number of days required for storage.
No of Channels
Frame Rate (fps)
(per camera)
Resolution
RecordingHours per Day
Days of recording
Percentage of Motion
Approx. Storage Required:
0
Approx. Bandwidth Required:
0
*The above information is only an approximate calculation and can be affected by environment factors like motion.
Calculation Method
The screen size
that is configured in the Motion Setup affects the size of the video recording.
The average image size for the 320x240 screen size is 3 KB. For 640x480 screen size,
the average image size is 7KB . These numbers are based on the technology
that i 3 DVR uses to make a digital video recordings: Motion JPEG technology.
Calculating the size of the video recording per
hour. The general formula for calculating video recording size:
(total fps number * size of one snapshot * 60
seconds * 60 minutes) / 10 6 = GB/H
Example: How long can a customer record continuously with the 12008 DVMS system on a 200GB
hard drive with the screen size 640x480? And with the screen size 320x240?
Note: To calculate the maximum length of
video recording that will fit on the available hard drive, subtract 30 GB from the
total hard drive space and divide this number by GB/hr number.
Solution:
200 GB - 30 GB = 170GB (total available space for video recording)
Therefore, the smaller screen size allows
for longer recordings . In this case, more than double the length of the
recording.
Note: this formula applies to the continuous
recording only. Never underestimate the size of the recording. In the long run,
the client would only be pleased to find out that in fact they can record for a
longer period of time than originally promised. For instance, if the client uses
Motion and/or Sensor recording as opposed to Continuous recording, ultimately they
will be able to record for a longer time period.
Also note: The Screen Size is basically the
picture resolution. The greater the resolution, the better the picture, the more
detailed it is. Although the lower Screen Size (lower resolution) will decrease
the size of the recording, it will also decrease its quality.
