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Re: Problem concerning accessing external library in IDL6.0 [message #47773 is a reply to message #47756]

Tue, 28 February 2006 13:41

ronn
Messages: 123
Registered: April 1999

Senior Member

Hi Peng,

Have you tried using Randall Frank's Video For Windows dll on my
website?

http://www.kilvarock.com/freesoftware/dlms/randallfrank.htm

I am currently using it to control a web cam from IDL and it works
great.

Here is a simple test procedure that you can use

pro testVFW

if VFW_PRESENT() eq 0 then begin
void = dialog_message('No Devices Found!')
return
endif

err=VFW_LIST(names,descs)

print, 'These are the devices found'
location = -1
for i=0,n_elements(names)-1 do begin
print, names[i], descs[i]
;find the webcam
if strpos(strupcase(names[i]),'WEBCAM') ge 0 then location=i+1
endfor

if location eq -1 then message,'No WebCam found'

err = VFW_CONNECT(location)
if err ne 0 then message,'Cannot connect to Webcam'
err= vfw_dialog(1)
err = vfw_grab(image, info)
window,0,xsize=(info.dimensions)[0],ysize=(info.dimensions)[ 1]
tvscl,image,/true
for i=0,10 do begin
err = vfw_grab(image, info)
tvscl,image,/true
endfor

return & end

thanks,
Ronn Kling
KRS, inc.
email: ronn@rlkling.com
Use these books to upgrade your IDL skills.
"Application Development with IDL"
"Calling C from IDL, Using DLM's to extend your IDL code". SECOND
EDITION includes C++ and debugging!
"Power Graphics with IDL, A Beginner's Guide to Object Graphics",

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[Message index]

		Re: Problem concerning accessing external library in IDL6.0 By: Rick Towler on Thu, 02 March 2006 09:55
		Re: Problem concerning accessing external library in IDL6.0 By: Haje Korth on Thu, 02 March 2006 05:32
		Re: Problem concerning accessing external library in IDL6.0 By: ronn on Thu, 02 March 2006 02:35
		Re: Problem concerning accessing external library in IDL6.0 By: yingjie, Peng on Wed, 01 March 2006 14:54
		Re: Problem concerning accessing external library in IDL6.0 By: yingjie, Peng on Wed, 01 March 2006 14:52
		Re: Problem concerning accessing external library in IDL6.0 By: ronn on Tue, 28 February 2006 13:41
		Re: Problem concerning accessing external library in IDL6.0 By: Rick Towler on Tue, 28 February 2006 10:51
		Re: Problem concerning accessing external library in IDL6.0 By: ronn on Mon, 06 March 2006 05:23

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