[MPlayer-users] Upscaling

[Alejandro Vargas]

2007/2/8, Tony Houghton <h at realh.co.uk>:
> I've got a DVD which is supposed to be widescreen, but it's really 4:3
> with letterboxing. I would like to try to convert it to proper 16:9 by
> upscaling, which could probably give a better appearance than "zoom" on

Let's supose the video of the dvd is 720x576 (check this with mplayer -identify)

It is in 4:3 that is the same as 16:12 and you want only 9 of this 12
( hat is 16:9)

If 12 shows 576 lines,
9 shows 576* 9/12 that is 432

Then, you must crop 576-432 lines = 144, (72 up and 72 down)

Then, let's crop it: mplayer dvd://1 -vf crop=0:72:720:432

(if I'm not wrong)

If you are going to convert it to avi, you must also scale it to a
propper value. It could be 768:432 but many hardware divx player will
not play more than 720 pixels wide, then it could be 720:240

-- 
Alejandro Vargas