[MPlayer-dev-eng] Re: [MP] Scaling gone bad

[Matthias Wieser]

Am Freitag, 1. Oktober 2004 11:04 schrieb Dragan Milenkovic:

> HEAD version gives nasty results when scaling with parameter set to
> sharp (-vf scale=480:360:0:0:85) for Gauss

Use 5 or 10 for better results. Default is 3.


> and bicubic (haven't tried 
> other methods).

Have you used scale=480:360:0:0:85 with -sws 2?

Manpage says you should use (for example) scale=480:360:0:0:0:0.75 for 
slightly sharper results (wich are worse to compress)


> Gauss gives uglier picture and bicubic simply goes 
> berserk. It was ok 1-3 months ago...

Options changed...

Btw. -sws 2 with default parameters or scale a:b:0:0:0.05:0:50 should give 
often best psnr. -sws 2 can be replaced by -sws 6 without significant 
change of the resulting psnr.