[mythtv-users] Mac OS X video profile settings in 0.21?

Monkey Pet monkeypet at gmail.com
Thu Mar 13 17:35:04 UTC 2008


Hi Todd, can you provide a binary for us to test?  I want to see if
this patch solves the issue for me.  Thx.

On 3/13/08, 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.
>
>  The patch is here: http://svn.mythtv.org/trac/ticket/4200
>
>  I also enabled the Mac video acceleration (dvdv) option.   For 720p
>  playback, it looked very promising.. CPU usage was around 50%.   But,
>  1080i playback didn't work right, the video output was corrupted with
>  tiles of what appeared to be unused video memory (e.g. chunks of the
>  Front Row menu were shown when video playback was attempted).
>
>
>
>  >  I see that the dvdv acceleration is listed as a new feature in 0.21.
>  >  Does this mean that it is now stable enough for common usage?  My
>  >  attempts at using it in the past didn't go well.   Are there any
>  >  limits on its support (is Leopard okay?), or is it documented
>  >  anywhere?      I am not positive, but I don't think the frontend
>  >  configuration generated by osx-packager.pl listed Mac acceleration as
>  >  being enabled.
>  >
>  >
>  >  The settings options appear to be:
>  >
>  >  Decoder: Standard, libmpeg2,
>  >  Video Renderer: opengl, quartz-blit
>  >  OSD Renderer: softblend
>  >
>  >  Decoder: Mac hardware acceleration
>  >  Video Renderer: quartz-accel
>  >  OSD Renderer: opengl3
>  >
>  >  I thought the closest approximation of 0.20 settings was  Standard
>  >  MPEG2, Quartz-blit, softblend.  But, that was still up around 150%
>  >  CPU.
>  >
>  >
>  >  Anyone having better results for Mac OS playback?
>  >
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