[MPlayer-users] Why 720x540 as opposed to 640x480?

[Ivo]

On Thursday 22 March 2007 20:20, Ivo wrote:
> On Thursday 22 March 2007 20:06, Jorge Fábregas wrote:
> > Hello everyone,
> >
> > I'm still learning about DAR's and PAR's...I'm now wondering why does
> > mplayer upscales (vertically) my NTSC DVD to 720x540 as opposed to
> > horizontal squeezing as in 640x480?  I know the goal is to obtain a 4:3
> > AR but isn't the latter best for interlaced material (still keeping the
> > 480 lines)?

Oh, ehm, I should read better before hitting send. I didn't see your comment 
about the content being interlaced. Yes, if you want to keep the 
interlacing, MPlayer should not mess with the number of lines. But it would 
be better to de-interlace the content first (vf yadif or tfields) and then 
upscale to the desired AR.

--Ivo