Mencoder encoding problems

[hobbes487]

I am trying to use mencoder to encode some pre-ripped DVDs to xvid. The command lines i'm using are:

mencoder -sws 2 -oac lavc -ovc lavc -lavcopts vcodec=mpeg4:vbitrate=1750:vhq:vpass=1:turbo:acodec=ac3 -vf crop=720:352 dvd:// -dvd-device "X:\Full Movies\JET_LI_FEARLESS" -o "X:\Full Movies\Fearless.avi"

mencoder -sws 2 -oac lavc -alang zh -slang en -ovc lavc -lavcopts vcodec=mpeg4:vbitrate=1750:vhq:vpass=2:acodec=ac3 -vf crop=720:352 dvd:// -dvd-device "X:\Full Movies\JET_LI_FEARLESS" -o "X:\Full Movies\Fearless.avi"

The problem is that when the encoding is complete it wont play in any video player except mplayer. Does anyone have any idea why this may be happening?

[hobbes487]

Update to my problem. I tried the encoding on a different computer with the same version of mencoder and the encoding works fine. :confused: Does mencoder use any external codecs or something that would be causing this?