[mythtv-users] Core 2 Duo iMac, terrible performance as front end

Craig Treleaven ctreleaven at cogeco.ca
Sat Jan 31 14:56:34 UTC 2009


At 8:17 PM -0700 1/30/09, David Snider wrote:
>When I got a new Mac Mini (Intel) I had a similar problem.  When you look at the video, does it look "scaled" to you, almost as if you are zoomed in to the video somewhat?   That's what was happening on mine.  Everything played terribly.  I had to go into the playback settings and change the video scale option.
>
>I had to go in to my playback settings and change the scale settings there (not the scale as necessary option).  I had to change them to a non "0" value, for example, -25%, and then the video was "properly" shrunk to a small size (lots of black around the edges), then, when I set the values back to 0, the video was scaled properly.  Very strange, but after that, everything worked great.

Dave, just to be clear, you mean:

Utilities/Setup -> Setup -> TV Settings -> Playback (Page 2/10)

and change both Vertical Scaling and Horizontal Scaling?  I know I've tried this before but when I can pry the kids away from the Wii, I'm going to have another go.

I've never had as good playback with .21-fixes as I had with .20.2.  I have two Mac Minis running OS X for Myth.  The frontend/backend is connected a Sony LCD projection set and to an A/V receiver using digital audio.  The other mini is a frontend only connected to a computer monitor and using analog audio.  For a description of the problems on the frontend/backend, see:
http://svn.mythtv.org/trac/ticket/5552

Todd Ignasiak posted earlier that he had good success with:
Decoder: Standard
Video renderer: quartz-blit
OSD Renderer: softblend

What deinterlacers are you using (primary/secondary)?

While I'm at it, here are the Mac specific settings (pages 9/10 of the above group):

Enable gamma correction for video:  Off
Scale video as necessary:  On
Frames to skip in fullscreen mode: 0
Video in main window:  On
  Frames to skip: 0
  Opacity:  100
Video in floating window: Off
Video on the dock:  Off
Video on the desktop:  Off

These are good, right?

Craig


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