LinuxQuestions.org
Share your knowledge at the LQ Wiki.
Go Back   LinuxQuestions.org > Forums > Linux Forums > Linux - Hardware
User Name
Password
Linux - Hardware This forum is for Hardware issues.
Having trouble installing a piece of hardware? Want to know if that peripheral is compatible with Linux?

Notices


Reply
  Search this Thread
Old 01-24-2004, 11:02 AM   #1
wdingus
Member
 
Registered: Aug 2001
Location: Kingsport, TN
Distribution: RHEL & FC
Posts: 267

Rep: Reputation: 30
Multi-Input Video Capture for Security


Does anyone have any suggestions for a framegrabber/video capture card with 4 or more inputs? No full motion video required, just the ability to _grab_ a frame on demand. Purpose is to hook up 4 or so video cameras and have an external source trigger when a frame is grabbed, probably an infrared detector. So, the ability to accept an external trigger would be good too. I suspect that won't really involve the camera or capture card itself though, probably some other method of A->D maybe through parallel, serial, USB or something else to be the trigger.

I like the looks of this card and it appears to have good Linux support:

http://www.ituner.com/spectra.htm

It's a bit expensive though... Decent quality single-frame grabbing would be just fine to me if a low frame-rate saves some money.

Thanks in advance!
 
Old 01-24-2004, 12:22 PM   #2
acid_kewpie
Moderator
 
Registered: Jun 2001
Location: UK
Distribution: Gentoo, RHEL, Fedora, Centos
Posts: 43,417

Rep: Reputation: 1980Reputation: 1980Reputation: 1980Reputation: 1980Reputation: 1980Reputation: 1980Reputation: 1980Reputation: 1980Reputation: 1980Reputation: 1980Reputation: 1980
one of the other mods here has provided this sort of thing on a commercial basis, i'll try and send him your way....
 
Old 01-24-2004, 02:13 PM   #3
mcleodnine
Senior Member
 
Registered: May 2001
Location: Left Coast - Canada
Distribution: s l a c k w a r e
Posts: 2,731

Rep: Reputation: 45
first stop - motion which is a nifty app with some great documentation.
second stop - grab a bt8x8 card with multiple inputs. i like the one from iTuner. It has four discreet bt878 inputs with two channels each. Been running rock-solid for well over a year 24x7.
 
Old 01-24-2004, 03:16 PM   #4
wdingus
Member
 
Registered: Aug 2001
Location: Kingsport, TN
Distribution: RHEL & FC
Posts: 267

Original Poster
Rep: Reputation: 30
Thanks appreciate it...

So the card I had already found is the one you recommend. At $395 it's a bit pricey but I have read quite a few good things about it. The motion detection stuff sounds great as well but I'll probably be initiating a framegrab based on external input, probably a hardware motion detector or electronic keycard swipe. Too much motion in the areas I have in mind and I'm only interested in capturing successful traversals of a few secure doors.

Does anyone have recommendations on any other cards that are cheaper by chance?

Anyone have any suggestions on an easy way to get 4 or so different inputs into a system from the real world? Cheaply... And the ability to trigger framegrabs from the appropriate input based on this input? I'll probably end up having to hack something together for this but something pre-made might make things a bit easier...

Thanks!
 
Old 01-24-2004, 03:29 PM   #5
acid_kewpie
Moderator
 
Registered: Jun 2001
Location: UK
Distribution: Gentoo, RHEL, Fedora, Centos
Posts: 43,417

Rep: Reputation: 1980Reputation: 1980Reputation: 1980Reputation: 1980Reputation: 1980Reputation: 1980Reputation: 1980Reputation: 1980Reputation: 1980Reputation: 1980Reputation: 1980
well if you're not after a professional solution, just buy 4 cheap tv cards and you can achieve a similar sort of thing, at the cost of pci slots.
 
Old 01-24-2004, 03:38 PM   #6
mcleodnine
Senior Member
 
Registered: May 2001
Location: Left Coast - Canada
Distribution: s l a c k w a r e
Posts: 2,731

Rep: Reputation: 45
yeah, that would save about 200 or so dollars and also give you sound. Get cable TV hooked up and you can record the Muppet Show as well

Avoid USB cameras like the Plague as they don't play nice with each other (bandwdth issues).

You could also skip the cards altogether and get an Axis camera that plugs into your existing ethernet (10/100) medium.
 
Old 01-24-2004, 03:42 PM   #7
acid_kewpie
Moderator
 
Registered: Jun 2001
Location: UK
Distribution: Gentoo, RHEL, Fedora, Centos
Posts: 43,417

Rep: Reputation: 1980Reputation: 1980Reputation: 1980Reputation: 1980Reputation: 1980Reputation: 1980Reputation: 1980Reputation: 1980Reputation: 1980Reputation: 1980Reputation: 1980
if you're after input capture based upon the input itself... then surely you're back to "motion" again... it saves framegrabs when a movement is detected.
 
Old 01-24-2004, 03:51 PM   #8
acid_kewpie
Moderator
 
Registered: Jun 2001
Location: UK
Distribution: Gentoo, RHEL, Fedora, Centos
Posts: 43,417

Rep: Reputation: 1980Reputation: 1980Reputation: 1980Reputation: 1980Reputation: 1980Reputation: 1980Reputation: 1980Reputation: 1980Reputation: 1980Reputation: 1980Reputation: 1980
as for external triggers..... i'd say just use a serial port. use a couple of lines there, relating each one to one of the v4l inputs.. or rather just run a shell call when any line goes high...
 
  


Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off



Similar Threads
Thread Thread Starter Forum Replies Last Post
What software for video capture for security cameras BrentonSpear Linux - Software 7 02-24-2010 09:52 AM
capture serial input at startup TomFuchs Linux - General 4 11-23-2005 10:00 AM
How to capture VIVO input on an Nvidia card? Electrode Linux - Hardware 4 12-19-2003 06:48 PM
Capture support for dvd and video capture in linux is it even going to be real ever? maximalred Linux - Distributions 3 07-06-2003 07:29 PM
driver for multiple input capture card deeja Linux - General 1 04-20-2002 03:55 PM

LinuxQuestions.org > Forums > Linux Forums > Linux - Hardware

All times are GMT -5. The time now is 03:15 PM.

Main Menu
Advertisement
My LQ
Write for LQ
LinuxQuestions.org is looking for people interested in writing Editorials, Articles, Reviews, and more. If you'd like to contribute content, let us know.
Main Menu
Syndicate
RSS1  Latest Threads
RSS1  LQ News
Twitter: @linuxquestions
Facebook: linuxquestions Google+: linuxquestions
Open Source Consulting | Domain Registration