[vlc-devel] Re: OpenGL acceleration

Gildas Bazin gbazin at netcourrier.com
Wed Oct 9 09:18:12 CEST 2002

On Tuesday 08 October 2002 23:04, bjsilva at btinternet.com wrote:
> Hello,
> I have no idea the difficulty/feasibility of this, but it's rather just 
> a thought (maybe you have thought of and rejected).
> Upon seeing the poor performance of DVD playback under Mac OS 10.2 
> Server on a 500mhz G3 (Pismo PB), I wondered if the video card could be 
> more utilized using OpenGL, similar to Quartz Extreme under 10.2. 
> Perhaps drawing the video on a flat OpenGL object rather than drawing 
> directly to a window (assuming that's what presently happens). Other 
> OSes obviously could use this method as well.

It would be very nice indeed but AFAIK OpenGL doesn't provide a way to 
access the hardware YUV->RGB colorspace conversion that most graphics cards 
have. That basically mean that OpenGL won't provide any kind of hardware 
acceleration for video display (except maybe hardware resizing of the 
video), which does render OpenGL pretty unuseful for video players except 
if you want to have some nice gimmicks like displaying your video on a 
sphere or things like this.

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