[mythtv-users] MacOS Hardware Acceleration

[Jarod Wilson]

On Saturday 18 February 2006 09:24, Todd Ignasiak wrote:
> > But, once stable, this
> >
> > > would make the Mac Mini into an excellent HDTV MythTV frontend.
> >
> > I *highly* doubt that. Accellent appears to be more akin to Xv or XvMC
> > acceleration provided by an nVidia card, where you still need a fair
> > amount
> > of cpu horsepower to watch HDTV. To use such a slow machine, you need a
> > full-out hardware mpeg2 decoder, capable of handling HDTV-sized frames,
> > more akin to the UniChrome Pro. But I could be wrong.
>
> Yes, Accellent is reverse engineering MacOS APIs to the same hardware
> functions used in XvMC and Windows DxVA (i.e. offloading the motion
> compensation and iDCT portions of MPEG2 decoding to the GPU).
>
> Prior to moving to MythTV, I used some Windows HD software.  On my old P3
> 933, using a Radeon 7000 and DxVA, I could do HDTV.   My 1.42GHz PowerPC G4
> is quite a bit faster than that old P3.   Unless the ffmpeg and/or display
> code in Unix is much less efficient

It is.

> I'm thinking the Mini will have enough horsepower.

I'm still skeptical, but...

> -- I just checked the Accellent developer's site, and he said he tested
> playback of 720p content on a 1.25GHz G4, and it took only 25% of the CPU.
> That's even lower than I would expect,  I'm anxious to see it in action in
> MythTV.

...if that's the case, that totally kicks ass.

-- 
Jarod Wilson
jarod at wilsonet.com
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