hi, i am a newbie in the cctv systems.

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 (per example) :
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?
and how resolution and compression influences the image size?

and for the case that i use the m4peg?
how can i know the storage requeried ?
how can i know the bandwidth requeried ?
can anybody help me?
the only solution is make a pratical test?? :?

best regards

What DVR are you going to be using? Most DVR manufacturers have a good storage calculator available.

Philips

How do you know that?

What compression is it using, Im not familiar with the philips systems, and didnt bosch take them over :(

I allow 20gb per day generally on mpeg4

I would get a geo system and use the inbuilt calculator to understand more of recording requirements and sizes of files.. it will be a good help I can assure you :)

i´m going use the samsung-2040, , but i don´t have any calculator.... someone knows, when i can get a storage calculator in the net?
Where can I find a calculator storage via Web? or a good image estimator ?
i still do not understand how the methods of compression( mpeg4, mjpeg(30) mjpeg(10), etc...) and resolution are related and affect the size of the video :?

i´m going use the samsung-2040, , but i don´t have any calculator.... someone knows, when i can get a storage calculator in the net?
Where can I find a calculator storage via Web? or a good image estimator ?
i still do not understand how the methods of compression( mpeg4, mjpeg(30) mjpeg(10), etc...) and resolution are related and affect the size of the video :?

visit this site for samsung SHR-2040 storage calculator http://www.gviss.com/default.aspx?tabID=435

Ah Rory you have a mystery on your hands :wink:

Thanks to all

So I realized, even if I use the same type of compression and the same resolution, the size of each image, will have different values for each type of DVR. In the future if I work with another dvr, I have to use other software to calculate the storage space :shock:

There are some approximate values that I can use for all dvr knowing the type of compression and resolution?

Actually there is no formula for it, because the compression is not a linear process, but there are many software bandwidth calculators:

http://www.google.com/search?hl=en&q=ip+camera+calculator&btnG=Google+Search


Here is a screenshot of IP video desing tool:




Just enter your resolution, compression, FPS, number of cameras and get the result.