peekdata help

Hi folks,

I'm having a bit of trouble with peekdata.

I have a video object created called 'vid',

I'm using

triggerconfig(vid,'manual');
start(vid);
RGBData = peekdata(vid,1);

This works fine, I get a 3d array in RGBData. But it only works in debug mode. As soon as I run it from the GUI I get...

"Warning: PEEKDATA could not return all the frames requested."

and RGBData is now empty... I can't understand why it works in debug but not when running normally.

thanks in advance, this is driving me nuts. Ollie

p.s. i'm trying to gather frames from a webcam indefinitely, is there's a better way to go about it?

Answer 1

[Walter Roberson]

Possibly there simply has not been enough time for the data to arrive. Try adding a small pause()

[Oliver]

hi, thanks for your response, i tried adding pause(5) and it still doesn't work.

I set the debug after the line RGBData = peekdata(vid,1);

Answer 2

[Image Analyst]

Try getsnapshot() instead. See if that works.

Answer 3

[Oliver]

Thanks, I tried getsnapshot() but found it to be too slow.

Whilst trying to figure out what was wrong I used a try;catch setup and after a couple of failed calls to peekdata(vid,1) it started working!