Re: Video resolution

I am unaware if anything has changed, but a few months ago I did some
searching and the CV_CAP_PROP_FRAME_WIDTH and CV_CAP_PROP_FRAME_HEIGHT
were not yet supported for cameras in highgui. I found a post at
http://groups.yahoo.com/group/OpenCV/message/28735 that has
instructions for adding in support for this so that you can change the
size of the capture frame.

Nathan

--- In OpenCV@xxxxxxxxxxxxxxx, "Kok Jun" <ck_jun@...> wrote:
>
> Hi i tried doing what you suggested. I tried it on a webcam as well
as on a 
> matrox frame capture card.
> 
> for the webcam, there was no effect, the window still remained the same 
> size...
> 
> for the matrox, there was an error and the program had to
terminate...would 
> you know what the problem might be?
> 
> Regards
> KJ
> 
> 
> >From: Rafael Nevarez <epilef99@...>
> >Reply-To: OpenCV@xxxxxxxxxxxxxxx
> >To: OpenCV@xxxxxxxxxxxxxxx
> >Subject: Re: [OpenCV] Video resolution
> >Date: Tue, 28 Mar 2006 09:29:11 -0800 (PST)
> >
> >Hi
> >
> >     If you want to change the resolution of the captured frame, use:
> >
> >  cvSetCaptureProperty(frame, CV_CAP_PROP_FRAME_WIDTH, 320); //640
> >  cvSetCaptureProperty(frame, CV_CAP_PROP_FRAME_HEIGHT, 240); //480
> >
> >     Or if you want to only to change the size of the window use:
> >
> >      cvNamedWindow("camara", 1); //CV_WINDOW_AUTOSIZE);  Set to
the size 
> >of the frame
> >      cvResizeWindow("camara", 320, 240);
> >
> >  Regards
> >
> >Kok Jun <ck_jun@...> wrote:    hi,
> >
> >  when i use the function cvCaptureFromCam(-1), it automatically
displays a
> >  window of a default size.
> >
> >  what can i do so that the display window will be of the size 320x240?
> >
> >  thanks!!
> >
> >  Regards
> >  KJ
> >
> >
> >
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