How can I adjust the brightness of my webcam?

I have a problem recently my cam (built in) is really really dark when using Skype or cheese I can barely see anything, Only when I spot a light on the cam I can see it but really dark

I have a Sony Vaio F127FD , I am running Ubuntu 10.10 (Desktop edition) fully updated

Note: the webcam was fine I guess the problem has something to do with the latest updates

Solution 1:

Install guvcview (still works on 20.04):

sudo apt install guvcview

On Image Control tab, there is a brightness slider control

Solution 2:

If not already installed, install the Video for Linux 2 Universal Control Panel (v4l2ucp), that will allow you to adjust your video settings