Hello, I use the command "mencoder dvd://1 -o title1.avi -oac copy -ovc copy" and "mencoder dvd://1 -of mpeg -o title1.mpg -oac copy -ovc copy",but mediaplayer can not play the result title1.avi and title1.mpg (mplayer can play them well). Why? How to fix it? Thank you very much! Best Regards, Xie Bo