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Calculating storage needs
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| ee01003 |
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Posts: 12
Joined: 08 Apr 2008
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Posted: Fri Apr 11, 2008 8:49 am
Post subject: Calculating storage needs
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hi..i have some problems in calculating the storage needs in a cctv system.
i know that the factors that i have to considered when calculating storage needs are:
-number of cameras
-number of hours per day, that the camera will be recording
-how long the data must be stored
- frame rate , compression, image quality and complexity
for the bellow exemple :
if i have 1 camera whit:
resolution= 640 * 480
frames per second=25
period of storage= 8 hours
compression = MJPEG (50)
i know that i have to use this formula (FOR 1 CAMERA):
required storage space=image size* frames per second * period of request
my principal question is how i can calculating the image size?
how resolution and compression influences the image size?
can anybody help me? 
best regards
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| si_kungs |
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Posts: 227
Joined: 16 Mar 2008
Location: Philippines
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Posted: Tue Apr 15, 2008 7:01 pm
Post subject:
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please check the time recording table of the DVR. if you don't have it, you can have an actual test. connect one camera to the dvr and select you desired setting. record for at least 2 mins and note down the quality setting and fps setting, from there you can estimate the space the will be occupied by the video for a certain setting.
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| ee01003 |
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Posts: 12
Joined: 08 Apr 2008
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Posted: Wed Apr 16, 2008 5:39 am
Post subject:
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| si_kungs wrote: |
| please check the time recording table of the DVR. if you don't have it, you can have an actual test. connect one camera to the dvr and select you desired setting. record for at least 2 mins and note down the quality setting and fps setting, from there you can estimate the space the will be occupied by the video for a certain setting. |
i donīt have the time recording table of the DVR. what you are saying is that is impossible to know the storage needs even if i knew the resolution,frame rate , compression mode(Mpeg4 or mjpeg), number of cameras, etc....unless i do a pratical test. so, when i need install a diferents cameras or DVRīs, whit a diferents resolutaion , i have to do new tests? thanks for your help, i am a newbie in cctv, and all information are welcome.
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| si_kungs |
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Posts: 227
Joined: 16 Mar 2008
Location: Philippines
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Posted: Wed Apr 16, 2008 6:26 pm
Post subject:
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| ee01003 |
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Posts: 12
Joined: 08 Apr 2008
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Posted: Thu Apr 17, 2008 3:36 am
Post subject:
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| si_kungs wrote: |
| what dvr are you using? |
i'm going use the samsung SHR-2040
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| si_kungs |
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Posts: 227
Joined: 16 Mar 2008
Location: Philippines
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Posted: Thu Apr 17, 2008 5:04 am
Post subject:
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| si_kungs |
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Posts: 227
Joined: 16 Mar 2008
Location: Philippines
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Posted: Thu Apr 17, 2008 7:01 am
Post subject:
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