[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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