libdvdread4

[Thibaut]

Hi

i'm trying to encode a dvd with ogmrip with kubuntu 10.4 in french

here is the error message:

mplayer -nolirc -nosound -nocache -noconfig all -v -benchmark -vo null 
-vf pullup -dvdangle 1 -frames 500 -dvd-device /media/dvdtitle dvd://1
libdvdread: Encrypted DVD support unavailable.
************************************************
**                                            **
**  No css library available. See             **
**  /usr/share/doc/libdvdread4/README.Debian  **
**  for more information.                     **
**                                            **
************************************************


but libdvdread4 is installed (sudo apt-get install libdvdread4)

do you have any idea how to read this DVD ?

t.