[MPlayer-users] encode to dvd useing nicos patch produce null size mpeg file!

[Heine Laursen]

Matthew W. Miller wrote:
> On Fri, Dec 10, 2004 at 04:53:12PM +0100, Heine Laursen wrote:
> 
>>Giacomo Comes wrote:
>>
>>>adding -vf scale=702:576,expand=720:576 to mencoder will do the job.
>>
>>Well that's basicley what I don't undarstand! How can the aspect be
>>1.33 when it's not 1.33? I'm confused :-(
> 
> 
> You're confused because you're assuming pixels in a DVD image are
> square. :) They're not, due to limitations in television hardware.  In
> PAL Land, the pixels are slightly wider than they are tall (so the image
> is fewer pixels wide than you'd expect).

I just do as aguide had told me i could "always" get the aspect radio. 
and when I don't get the aspect radio I want I get confused :-)

> 702x576 of a PAL DVD image is stretched horizontally to a 4:3 aspect
> ratio.  Getting it to that crucial size is what the 'scale' part of
> Giacomo Comes's suggested command line does.
> 	There's a little extra width, (a.) to give some leeway for dubs
> from analogue videotape, and (b.) to simplify MPEG compression by
> getting both dimensions to multiples of 16; so the total image is
> 720x576.  That's what the 'expand' part accomplishes.

man reading

> For excruciating levels of detail on this matter, see
> http://www.iki.fi/znark/video/conversion/  (which has been referred to
> on this list a few times before).

Thanks. I have actully been going through the mallinglist for this link.
Bookmarked for future reading.

Sincerley
Heine Laursen