Greetings, On Monday 08 October 2001 22:24, you wrote: > Hi, I am totally new to V4L. Currently I am woking on a project whcih > will use two Philip 740 toU USB cam. I need use QT or other GUI tools to > show the image obtained from the cams. I can use V4L interface to query > the cams, but I don't know how to show them in the window. How can I > connect the v4L API to the GUI. Is there a simple example I can study? <plug type="shameless"> Try CamStream; it's written in Qt, and it supports the Philips cams very well. Make sure you use a recent Linux kernel and the latest camstream version (http://www.smcc.demon.nl/camstream/). </plug> Good luck, - Nemosoft