[mythtv-users] Core 2 Duo iMac, terrible performance as front end
todd.ignasiak at gmail.com
Fri Jan 30 18:58:29 UTC 2009
On Fri, Jan 30, 2009 at 7:42 AM, Matt Emmott <memmott at gmail.com> wrote:
> On Fri, Jan 30, 2009 at 10:31 AM, jedi <jedi at mishnet.org> wrote:
>> The AppleTV (nv based) and the Mini (Intel based) both seem to do
>> well enough. I quickly dumped ATI after using it on my first dedicated
>> frontend and will never use their stuff again.
> So it's an ATI driver issue? Anything I can do? It seems a real shame that a
> pretty beefy machine like this can't push HD or even SD, when my less
> powerful Macbook laptop could render them just fine. I suppose I could
> install Ubuntu on it, I wonder if I can wedge it into my NTFS Windows 7
> partition via Wubi...
I don't think it is related to the video chipset. Regardless of the
video chip, Mac OS X is not benefitting much from any sort of
acceleration/offload (as opposed to XvMC or VDPAU on Linux or DxVA on
Windows). In Mac OS X, it's just doing software decoding.
I have tested HD video on my parents' 2.4GHz 24" iMac with ATI, and it
worked fine. My primary frontend is a CoreDuo 1.66GHz Mac Mini with
Intel Integrated graphics, and it works fine with 1080i HD.
I would first double check the video decoder settings. The default
settings are decent Linux options, but not good Mac options. On my
mini, I have one entry for all resolutions,
Video Renderer: quartz-blit
OSD Renderer: softblend
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