The path to v4l1compat.so has been changed. So, you should use the command:
LD_PRELOAD=/usr/lib/i386-linux-gnu/libv4l/v4l1compat.so /usr/bin/skype
—-open Software Centre and install Ubuntu restricted extras from there.
Once this is done open a Terminal and copy and paste the following command
sudo gedit /usr/share/applications/skype.desktop After you have provided your password a text editor will open. Line 4 should look like this
Exec=skype Replace with this text
Exec=bash -c 'LD_PRELOAD=/usr/lib/i386-linux-gnu/libv4l/v4l1compat.so skype' Save and exit the text editor and close the terminal. Now you can open Skype and test your webcam via 'options' then 'video devices'
http://askubuntu.com/questions/126765/skype-video-not-working-after-upgrade-from-11-10-to-12-04