[MEncoder-users] scaling

[Martin Collins]

On Fri, 6 Jan 2006 20:48:04 +0100
Uzu Maki <tsukune at gmail.com> wrote:

> mplayer says: 720x576 => 1024x576
> 
> my encoding options:
> -oac mp3lame -lameopts abr:br=128
> -ovc xvid -xvidencopts bitrate=1500:pass=1
> -vf crop=704:432:7:72,scale=700:302,pp=lb
> 
> and when reading movie.avi -> 700x302 = perfect
> 
> QUESTION:
> this is hardly a question...
> I've started doing this when I got bad resulting files when murging
> (MKV, OGM)(this = checking out the output scaling of mplayer
> {1024x576 in this example} and using what I think would be better
> scaling in my encoding options...)
> 
> I don't understand really what happens...
> Is there anything wrong in my way of mencoding ?

Deinterlace first.
Your final dimensions should be divisible by 16 for maximum encoding
efficiency.
Rather than scale I would set the aspect ratio with -aspect for
mencoder and --aspect-ratio for mkvmerge. In this example it would be
 -aspect 1000/432
 --aspect-ratio 0:1000/432

Martin