[MEncoder-users] scaling

[Dominik 'Rathann' Mierzejewski]

On Saturday, 07 January 2006 at 12:56, Uzu Maki wrote:
> 1)
> > Deinterlace first.
> > Your final dimensions should be divisible by 16 for maximum encoding
> > efficiency.
> 
> damned... I thought the 16 factor was only for cropping...

Actually it's 2 for cropping. Unless you're cropping interlaced/telecined
source, then it's 4.

> > 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
> 
> I'll try aspect, thanx...
> (as for MKV & OGM, I've stopped using them...)
> 
> 2)
> > -vf crop=704:432:7:72,scale=700:302,pp=lb
> > If this is interlaced, you're really going to want pp=lb at the
> > beginning of the command-line.
> 
> when you guys say 'deinterlace first', you mean:
> -vf pp=lb,crop=704:432:7:72,scale=700:302
> instead of
> -vf crop=704:432:7:72,scale=700:302,pp=lb
> right?

Yes, you should alwayes deinterlace before scaling.

R.

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