[Mplayer-dev-eng] Matrox dualhead and syncfb.

[German Gomez Garcia]

On Tue, 1 May 2001, Felix Buenemann wrote:

> On Dienstag,  1. Mai 2001 22:07 you wrote:
> > > 	Well, 960 = 16/9 / (4/3) * 720, that is I was considering aspect
> > > ratio of my screen (1600x1200). But anyway, how can I get wider
> > > images? That is if I have 1600x1200 resolution when I want to play a DVD
> > > that is 16:9 I should make it follow a 4:3 ratio, because my screen
> > > change it to 4:3*4:3 = 16:9, I'm right? I'm really puzzled now ...
> >
> > -aspect switch should only care for video size not for screen res (that's
> > done by vo plugin), so I calculate aspect by 9:16 = 0.5625 * 720 = 405
> > (->720x405) or the other way around 16:9 = 1.7777777777 * 576 = 1024
> > (1024x576), if you devide 720/16 and 405/9 you both get 45 and for 1024/16
> > and 576/9 you get both 64. I think this is correct, but maybe I'm mistaken
> > :) (I repeat screen sapect should be taken care of by output plugin as it
> > decides target resolution).
> 
> Just did some calculation using your math and think it comes out to the same 
> result: 1.85/1 / (1280/1024) * 720 = 1066 now split it up so screen 
> resolution calc can be done by libvo: 1.85/1 * 720 = 1332 second step is 
> 1024/1280 = 0.8 * 1333 = 1066 voila. Now as I do it the other way around 
> that's 720/1066 = 0.6756 * 576 = 389. Now if I look at what mplayer -aspect 
> 1.85:1 does: "VO: [sdl] 720x576 => 720x389  YV12".
> So do you see something incorrect in this? Or have I missed calculating for 
> proper screen res in second way? (looking at it 720x389 looks very ok -> very 
> round flashlight in the matrix [no egg])
> (I'm getting slightly confused =)

	So, the problem is that I get the wrong version from your email??
Just pasted from mplayer output:

Aspect: Destination: 720x368
Aspect: X: 1.850000
Aspect: Y: 1.000000
VO: [fbdev] 720x368 => 720x389  BGR32

	What I'm doing wrong?? Maybe you should first calculate image
properties? Or it is just 'not-desirable' to change aspect or not standard
images?

	- german

-------------------------------------------------------------------------
German Gomez Garcia         | "This isn't right.  This isn't even wrong."
<german at piraos.com>         |                         -- Wolfgang Pauli


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