[MPlayer-users] Audio Problem with dvd

[Vlad]

I just bought hitchhikers guide to the galaxy  on DVD and when I play
it with Mplayer it says something like cannot find audio codec and all
it does is makes Buzzing noises but if i skip to chapter 6 or so it
starts playing the sound fine if i rewind it from there the audio will
play fine all the way through. My computer however cant play DVDs
smoothly unless i rip them to the hard drive but if i rip it to the
hard drive i cant ship to chapter 6 and rewind to the beginning so it
just buzzes all the way through. Can anyone tell me how to fix this?