UNIX
Compile either as application with:
>>gcc read_camera.c -v -std=c99 $(pkg-config --libs --cflags opencv)

or for MATLAB with:
>>mex read_camera.c -v CFLAGS='$CFLAGS -std=c99' $(pkg-config --libs --cflags opencv)

MS WINDOWS
Compilation should be similar to unix

USAGE
In MATLAB use read_camera(-1) to deinitialize the cam.