[MEncoder-users] xvid second pass

[Marco]

As suggested, bitrate should be specified for the second pass.

Maybe I found a wrong HOWTO
http://gentoo-wiki.com/HOWTO_Mencoder_Introduction_Guide

[...]

*  Audio preprocessing
mencoder dvd://1 -ovc frameno -o frameno.avi
* First pass
mencoder dvd://1 -ovc xvid -xvidencopts pass=1 -o /dev/null
* Second pass
mencoder dvd://1 -ovc xvid -xvidencopts pass=2 -o <filename.avi>

What is that audio preprocessing step for?
Why wasn't specified any bitrate?
Could it work?

Thanks again,
Marco