How can i grabb some image using an usb video grabber in Labview 7?

[Ovidiu Condrea]

How can i make a list with all video and audio devices?
How to use DirectShow functions in Labview 7?

[C. Allen Weekley]

There is a LabVIEW Webcam Library at
http://www.cs.unc.edu/~parente/labview/index.shtml.
When run it should allow you to select a video source from a list of video sources installed on your machine.

[JuanCarlos]

Hi,

I can help you out with the audio part of your question: the Windows API has a set of functions called waveOutGetNumDevs and waveInGetNumDevs that give you the number of available devices for input or output. Then you can use waveInGetDevCaps and waveOutGetDevCaps to get more information on each device; with some work you could get the manufacturer and formats supported.

I have very limited knowledge on DirectShow; however it is based on COM so you shold be able to access it with LabVIEW's ActiveX capabilities.

I hope this helps.

Regards,

Juan Carlos
N.I.