[mythtv-users] Mac OS X video profile settings in 0.21?
scram69
scram69 at gmail.com
Thu Mar 13 15:36:52 UTC 2008
On Thu, Mar 13, 2008 at 12:02 AM, Todd Ignasiak <todd.ignasiak at gmail.com> wrote:
> On Sun, Mar 9, 2008 at 1:37 PM, Todd Ignasiak <todd.ignasiak at gmail.com> wrote:
> > I just upgraded my Mac OS X MythTV setup to 0.21, and ran into
> > problems with video playback performance.
> >
> > 1080i playback went from using 80-90% of one CPU (Mac Mini 1.66GHz
> > Core Duo) in 0.20.2 to 135-155% CPU with 0.21 and choppy playback.
> > I have tried a bunch of settings for the video profile, but nothing
> > has brought the CPU down from the 150% range. Even 720p playback,
> > which used to be around 65-70% cpu load, is at 130%+.
>
> After a bunch of experimentation, I finally located a Trac ticket
> which had a patch to enable MMX in Leopard. After applying that
> patch, video decoding CPU usage is back down in the ballpark that 0.20
> was in. Are these 'known issues' posted anywhere? It is not
> mentioned in the release notes, or any mailing list, wiki, etc. that I
> could find.
>
Does this mean that the high CPU usage is a Leopard-only issue? Is
MMX enabled by default for Tiger in 0.21? I'm holding off on
upgrading the backend to 0.21 until I can be sure my OSX 10.4 frontend
won't be crippled...
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