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 2 USB cameras with the same name
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Paruyr

Canada
14 Posts

Posted - Aug 08 2013 :  12:13:26  Show Profile  Reply
Hello,
We have 2 USB cameras connected. They show up in the list with the same name. For the second one we use the instanceindex = 1 in setvideoinput function. Each one can be activated and works fine but when we try to work with both we can see the signal from the first one only.
Can you advice please.


Thank you,
Paruyr.


Paruyr

fab

1310 Posts

Posted - Aug 15 2013 :  03:08:05  Show Profile  Reply
Hello,
do you have setup a TImageEnView for each camera?
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Paruyr

Canada
14 Posts

Posted - Aug 15 2013 :  03:28:16  Show Profile  Reply
Yes. I have 4 of them. Application works with 4 video sources at the same time. And it does work with all four sources. It happens with some usb cameras. I even tested it when cameras have different names and could recreate the problem. Somehow it depends on camera type or maybe driver ...? AND THE MOST INTERESTING THING IS that I tried the imageen demos - it has the same problem. I even tried with AMCAP.exe running it twice - one for each camera. It also crashes/freezes.

Paruyr
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fab

1310 Posts

Posted - Aug 16 2013 :  03:34:13  Show Profile  Reply
AMCAP also crashes?
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Paruyr

Canada
14 Posts

Posted - Aug 16 2013 :  10:42:18  Show Profile  Reply
Yes. It hangs when try to get the signal from the second camera.

Thank you,
Paruyr



Paruyr
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fab

1310 Posts

Posted - Sep 06 2013 :  04:17:28  Show Profile  Reply
AMCAP should work (it uses DirectShow in order to capture frames, like ImageEn), for this reason it could be a device driver problem.
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Paruyr

Canada
14 Posts

Posted - Sep 26 2013 :  18:41:07  Show Profile  Reply
But each one separately works fine.

Paruyr
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Paruyr

Canada
14 Posts

Posted - Oct 04 2013 :  06:11:58  Show Profile  Reply
Yes, It was a a device driver problem. We installed the driver and everything is working now.
Thank you.



Paruyr
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