[MPlayer-users] stairstepping in my picture but only with dvds?!?

D Richard Felker III dalias at aerifal.cx
Wed Apr 16 00:31:59 CEST 2003

On Tue, Apr 15, 2003 at 09:55:34PM +0200, justin case wrote:
> [Automatic answer: RTFM (read DOCS, FAQ), also read DOCS/bugreports.html]
> hi,
> i get heavy sairstepping in diagonals using -vo vesa:vidix (ati
> rage3d/mach64 driver) when playing dvds.
> i am forced to use vesa and a resolution of 640x480 due to my tv-input
> (vga).
> playing xvid works fine. my xvid rips mostly come with a 640 resolution
> anyway, so i guess the effect is caused by the rescaling-process wich vesa
> is capable of doing in hardware afaik.
> i know this card under windows with dvds and the effect is not there at all,
> so it can do better. but how?
> i tried software-rescaling already and i ended up with right the same stairs
> :(
> any ideas?

Yes, the problem is that you cannot scale an interlaced movie, which
your DVDs happen to be. Set your video mode to 640x480 to avoid having
to rescale. Note that unless you're sending the picture to tv-out,
you'll also need to deinterlace (-vf pp={md|fd|ci|li|lb|l5}, pick one)
or it will look bad on your monitor.


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