Can only rip or burn 45 minutes of film instead of standard 2 hours

Up until recently I was able to rip and burn movies for their full duration. Now when I rip a film either from an AVI file or from my RAM discs etc , I get an average of 45 minutes of the file?

I have already posted this problem on the LG Burner section thinking this was the problem but I don’t think this is the case – see the link below for more background information.

Any help will be appreciated