[MPlayer-users] Re: Split an Mencoder Divx with vbr mp3 audio

Green, Shaun Shaun.Green at msfc.nasa.gov
Tue Oct 15 15:17:02 CEST 2002


> 2)mencoder -dvd 1 -alang es -oac copy -o movie.avi -ovc lavc -lavcopts
> vcodec=mpeg4:vpass=1:vbitrate=1426:vhq -vop crop=718:284:0:50,
> scale=720:384
>
>If you reverse the scale and crop commands (and adjust the parameters)
>you will encode faster. It's faster to crop than to scale, so yuo want
>to scale the cropped picture.


But it's MUCH less intuitive and harder to setup and get the right aspect
ratio. By specifying crop, then scale, yes you actually are scaling first,
which gets the aspect ratio correct, then you crop the black bars away. This
is intuitive and easy to understand.

>.avi is a dead end, switch to the .ogm container :
>- you can use the vastly superior Vorbis audio codec
>- no more a-v sync problems in winblows

But is ogg supported natively in 'Winders'? It probably requires special
tools installed before playing, which means it's too much trouble for
cross-platform.

Shaun




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