Path: news.mathworks.com!not-for-mail
From: "Borys Golik" <boris.golik@gmx.de>
Newsgroups: comp.soft-sys.matlab
Subject: Image Acquisition - winvideo device 'disappears'
Date: Wed, 28 Oct 2009 17:28:03 +0000 (UTC)
Organization: The MathWorks, Inc.
Lines: 8
Message-ID: <hc9uv3$mp6$1@fred.mathworks.com>
Reply-To: "Borys Golik" <boris.golik@gmx.de>
NNTP-Posting-Host: webapp-02-blr.mathworks.com
Content-Type: text/plain; charset="ISO-8859-1"
Content-Transfer-Encoding: 8bit
X-Trace: fred.mathworks.com 1256750883 23334 172.30.248.37 (28 Oct 2009 17:28:03 GMT)
X-Complaints-To: news@mathworks.com
NNTP-Posting-Date: Wed, 28 Oct 2009 17:28:03 +0000 (UTC)
X-Newsreader: MATLAB Central Newsreader 1645138
Xref: news.mathworks.com comp.soft-sys.matlab:580695


Hi,

I'm using MATLAB R2008b and the Image Acquisition Toolbox. I've got a MATRIX VISION framegrabber. After starting MATLAB it's found correctly by winvideo adaptor, this means imaqhwinfo('winvideo') lists it in the DeviceIDs and I can see a preview with videoinput and preview functions. So far... But if I then call the imaqreset function the winvideo adaptor doesn't show me my framegrabber anymore, I only see my webcam. The only way to create a videoinput object I've figured out is to close MATLAB and start it again. Other devices (e.g. my webcam) are not affected by this issue, which means they are still there after imaqreset. it's only about this particular framegrabber. This behaviour is reproducible within imaqtool GUI, which is probably just a frontend for IMAQ functions, so it's not surprising me.

Does anybody know a solution? I don't get any errors or warnings which might help... The framegrabber is just not there...

Thanks a lot in advance!
Boris