[MPlayer-users] Playing QHD (3840x2160) material with mplayer
Dominik 'Rathann' Mierzejewski
dominik at rangers.eu.org
Thu Apr 17 15:15:38 CEST 2008
On Thursday, 17 April 2008 at 00:49, Dean S. Messing wrote:
> Reimar Döffinger wrote:
> > On Fri, Apr 11, 2008 at 01:54:04PM -0700, Dean S. Messing wrote:
> > > (1920x1080) uncompressed RGB at 60fps using the x11 driver. The two
> > > CPUs sit at about 40%. Interestingly, using the xv driver, the usage
> > > is quite a bit higher.
> > That is no surprise, xv (at least when using the default port) does not
> > support RGB (though I am surprised it works at all, my nVidia card can
> > only do at most a resolution of 2046 x 2046 with xv).
> You may have mis-understood me. The xv vs. x11 experiement I did above
> was for HD video (smaller than 2046x2046), not QHD.
I think Reimar understood that part correctly. Higher CPU usage with xv
output is a result of software conversion from RGB (your material) to YV12
(xv supported colourspace). X11 output supports RBG directly.
> Indeed, trying to use xv with QHD gets:
> Source image dimensions are too high: 3840x2160 (maximum is 2046x2046)
> What do mean by the "default port"?
It is common for video cards to have one true overlay port and a number
of emulated overlays on other ports. See xvinfo output.
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