Nik747
Posts: 5
Joined: Thu Feb 19, 2015 6:46 pm

GPIO + CCTV

Thu Feb 19, 2015 6:57 pm

Hello, I'm new here, found this great project and got first question for it.

Is it possible to capture data from CCTV camera through the I/O Ports? if not, how it's possible to get data from CCTV camera..

Thanks.

ame
Posts: 3172
Joined: Sat Aug 18, 2012 1:21 am
Location: Korea

Re: GPIO + CCTV

Fri Feb 20, 2015 12:09 am

Buy a USB video capture card. No GPIO connections necessary.

Nik747
Posts: 5
Joined: Thu Feb 19, 2015 6:46 pm

Re: GPIO + CCTV

Fri Feb 20, 2015 3:43 am

ame wrote:Buy a USB video capture card. No GPIO connections necessary.
which one? but GPIO is possible?

ghans
Posts: 7871
Joined: Mon Dec 12, 2011 8:30 pm
Location: Germany

Re: GPIO + CCTV

Fri Feb 20, 2015 6:25 am

No.


ghans
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jimallyn
Posts: 51
Joined: Wed Nov 12, 2014 9:13 am

Re: GPIO + CCTV

Fri Feb 20, 2015 6:37 am

Technically, almost anything is possible to do with the GPIO port. If you wanted to use most of the GPIO pins, and write your code in C or assembly language, I'm pretty sure you could interface a CCTV camera. But that's definitely not the easy way to do it!
“So you say you love the poor? Name them.” - Gustavo Gutierrez

Nik747
Posts: 5
Joined: Thu Feb 19, 2015 6:46 pm

Re: GPIO + CCTV

Fri Feb 20, 2015 6:48 pm

how is it possible? I'm pretty interested :)

I want to make a DVR like thing with 2 ports (3 better) one day recording..

jimallyn
Posts: 51
Joined: Wed Nov 12, 2014 9:13 am

Re: GPIO + CCTV

Fri Feb 20, 2015 8:13 pm

How to use IO ports, C, and assembly language is a bigger topic than can be covered here. I would start by seeing what format the video source you have uses, and do some Googling (and asking here on the RPi forums) on how to convert that to something you can save to a USB drive.
“So you say you love the poor? Name them.” - Gustavo Gutierrez

ghans
Posts: 7871
Joined: Mon Dec 12, 2011 8:30 pm
Location: Germany

Re: GPIO + CCTV

Fri Feb 20, 2015 8:24 pm

This proposal is not realistic in my opinion. The sensible thing is to research USB videograbbers which work on the Pi instead.
Otherwise you will lose a lot of money for tools , time and hair.


ghans
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jimallyn
Posts: 51
Joined: Wed Nov 12, 2014 9:13 am

Re: GPIO + CCTV

Fri Feb 20, 2015 8:36 pm

Doing it this way would definitely be a learning experience. That's what we used to call it at the TV repair shop I used to own when we weren't making any money.
“So you say you love the poor? Name them.” - Gustavo Gutierrez

ame
Posts: 3172
Joined: Sat Aug 18, 2012 1:21 am
Location: Korea

Re: GPIO + CCTV

Fri Feb 20, 2015 9:59 pm

Nik747 wrote: I want to make a DVR like thing with 2 ports (3 better) one day recording..
Would 4 ports be even better?
https://www.usbgear.com/computer_cable_ ... C182%2C175

Nik747
Posts: 5
Joined: Thu Feb 19, 2015 6:46 pm

Re: GPIO + CCTV

Sat Feb 21, 2015 10:44 am

Yea, I'm not gonna make a money from it.. i know that USB converters but GPIO is a challange that if u complete it, other things will be... :D I think so.. the bad thing is that I dont know linux good and schematics.

ame
Posts: 3172
Joined: Sat Aug 18, 2012 1:21 am
Location: Korea

Re: GPIO + CCTV

Sat Feb 21, 2015 11:33 am

Luckily, there's nothing new under the sun. Here's something that might help you achieve what you are trying to do:
http://www.techmind.org/vd/vidmk2.html

ghans
Posts: 7871
Joined: Mon Dec 12, 2011 8:30 pm
Location: Germany

Re: GPIO + CCTV

Sat Feb 21, 2015 3:53 pm

http://www.techmind.org/vd/vidmk2.html wrote:Very high quality PAL colour decoding in software (not real-time, few seconds per image). NTSC colour in pipeline!

Good luck with that.

ghans
• Don't like the board ? Missing features ? Change to the prosilver theme ! You can find it in your settings.
• Don't like to search the forum BEFORE posting 'cos it's useless ? Try googling : yoursearchtermshere site:raspberrypi.org

Nik747
Posts: 5
Joined: Thu Feb 19, 2015 6:46 pm

Re: GPIO + CCTV

Sun Feb 22, 2015 7:59 pm

Isn't it toooo old?

ame
Posts: 3172
Joined: Sat Aug 18, 2012 1:21 am
Location: Korea

Re: GPIO + CCTV

Sun Feb 22, 2015 10:53 pm

Nik747 wrote:Isn't it toooo old?
No. That's how video digitisers work. If you can not understand that project in detail then you won't be able to build one. However, it also indicates the complexity of what's inside the tiny USB video digitiser dongles that you can buy these days for a couple of dollars.

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