🚀 go-pugleaf

axh96c@cs.nott.ac.uk wrote in message <6en05j$fk6$1@nnrp1.dejanews.com>...
>Dear All,
>
>I have successfully used the vfw32 and Avicap functions to capture frames
>using a frame grabber card and a simple camera and perform image processing
>tasks on the incoming frames. I have achieved this by using a Callback
>function and capSetCallbackOnFrame macro. However, I am experiencing two
>problems, namely
>
>1) I can only capture 6 frames per second with the image processing
functions
>active or ( 8 fps without any image processing )

I've run into similar problem with frame rate using VideoLab OCX (you can
download
free demo from their website). The best rate I could get was about 9 fps
(callback was
incrementing the counter only) grabbing 160x120 images and I know that my PC
can
easily do 30fps at 320x240 or more. My best explanation so far blames OCX
overhead,
but it looks less likely after reading about your problems. By the way, I
wasn't succesful
in using vfw32 directly - I was able to capture to file without preview
only. Could you
send me your code (only if its Borland C++ Builder)?

Paul Jurczak
<puplan@acm.org>