Few days back I watched a funny movie and the dialouges were superb and thought of listening again and again as its funny movie.
As I use linux, I just wanted to play the movies audio but not the video in mplayer, after searching from man pages found this.
If you wish to listen only film dialouges run the command :-
mplayer filename.mpg -vo null
mplayer -vo null filname.mpg
Try & Enjoy the audio movie :-)