Could not connect to the image acquisition device. Device may be in use.
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Hello there,
I was trying to get a video stream from my web camera genius gf112 under linux OS. I use 64-bit Gentoo and Matlab 7.12.0(R2011a). I used the following command line:
LD_PRELOAD=/usr/lib/libv4l/v4l2convert.so ./matlab
to run Matlab. After that I got a vid object using videoinput() function like shown here:
vid = videoinput('linuxvideo', 1, 'RGB3_352x288')
Summary of Video Input Object Using 'CIF Single Chip '.
Acquisition Source(s): pac207 is available.
Acquisition Parameters: 'pac207' is the current selected source.
10 frames per trigger using the selected source.
'RGB3_352x288' video data to be logged upon START.
Grabbing first of every 1 frame(s).
Log data to 'memory' on trigger.
Trigger Parameters: 1 'immediate' trigger(s) on START.
Status: Waiting for START.
0 frames acquired since starting.
0 frames available for GETDATA.
But when I tried to preview or start getting a stream from the camera
start(vid)
preview(vid)
I received the following error:
Warning: Unable to reset the crop area. Perhaps the device is
in use.
??? Error using ==> imaqdevice.preview at 181
Could not connect to the image acquisition device. Device may
be in use.
What did I do wrong?
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Answers (1)
Mark Jones
on 15 Sep 2011
Hi Sergey,
Can you contact technical support for this issue?
Mark
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