Hi all.. im finding difficulty in installing the drivers for my webcam.

Im following the installation guide as in the page
Link

When I try to
cmake .. -DCMAKE_INSTALL_PREFIX=/usr

it says-
"Linux UVC Driver sources (uvcvideo.h) not found. Try adding its path to the CMAKE_INCLUDE_PATH environment variable."

please help!!

Hello and welcome to LinuxQuestions,

I'm sure you have your reasons why you would compile a specific driver for your webcam although it should work out of the box if it's an UVC webcam. You're following instructions for an Orbit AF, is that the webcam you have? I have exactly the same one and it works out of the box on my Slackware.

The answer to your question is in the error you got, just add the CMAKE_INCLUDE_PATH variable to the cmake command indicating the path where you copied the uvcvideo.h file to. If you followed the instructions correctly from the page you linked to it should be something like this:
if /libwebcam/Common/include/ is the path where you copied the needed file to. If you're not sure then use the find command to find out where it is:
Kind regards,

Eric

Most modern distros usually have the uvc driver already available. Have a look at the output of lsmod and see if uvcvideo is already there. If no, try running modprobe uvcvideo as root and see if that gets your camera working.