You have a IEEE1394 (Firewire) camera and you want to burn your birthday/wedding/funerals on a DVD. And maybe cut the scene where you look silly, dancing madly with a potato in your pants. It's Ok, Ubuntu can save your reputation...
First, we will workaround Bug #196743 by adding you to the "disk" group. Open a terminal and type de following command ($USER must be replaced by your login):
sudo adduser $USER disk
Now, logout and login again on your computer. I know, it's tricky, it's a bug, it will be solved someday.