[mythtvnz] Freeview|HD - anyone tried a Mac?

[Nick Rout]

On Mon, Aug 25, 2008 at 12:13 PM, Wade Maxfield <mythtvnz at hotblack.co.nz>wrote:

> Nick Rout wrote:
> > Occurs to me that at least some Mac models have hardware h.264
> acceleration.
> > Can Myth on Mac OSX use this acceleration? Has anyone tried this? Can
> other
> > software on Mac OSX or Linux on a Mac access this feature?
> >
> > Nick.
> >
>
> The Apple supplied DVD player and other Apple apps use the graphic
> processor for hardware acceleration. I don't know of many other apps
> that can use it. I don't know if this is because Apple is using private
> APIs or not. There are some apps that use the GPU for video processing,
> but they're mainly effects like Blur, Sepia Tone, Inverting colours, etc
> (all effects provided by Core Image processing). I haven't seen much
> info floating round on using the GPU for video decoding (but I'm not a
> developer - so that doesn't count for much)
>
> There was work a while ago on some code to try and use the DVD/MPEG2
> methods for playback. I think it stalled.
>
> 0.21 has some options under the playback profiles to use quartz-accel.
> This will try to use the graphics processor for MPEG2 playback.  This
> didn't work reliably on the machines I've tried (G5 Tower, G4 Tower, Mac
> Mini G4, Mac Mini Intel, MacBook Pro). Some crashed, and others didn't
> look that good when it did work.  I haven't tried this since 0.21 was
> first released.
>
> As far as other apps on Linux using this, it's the same old story with
> ATI/Nvidia drivers not using hardware acceleration.  Once you're in
> Linux, it's just a PC with Nvidia or ATI graphics hardware (or even
> Intel embedded graphics on the Mini)
>
>  - Wade


Yeah I figured that would be the case with linux, but I had hoped Apple
might allow some sort of open api to the hardware decoding through a OSX
API. Pipe dream I guess, knowing apple!
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