[mythtv-users] MacOSX frontend & 1080i

Todd Ignasiak ignasiak at gmail.com
Tue Mar 13 23:30:24 UTC 2007

On 3/13/07, Andrew Gallatin <gallatin at cs.duke.edu> wrote:

> > Also, I doubt the LCD is being run at 150Hz, where does Myth show
> > that?   I think LCDs are set to 60Hz by default, although it's hard to
> > tell for sure.   I installed SwitchResX control panel & output the DDC
> > data for the display, and it showed it was running 1440x900 @ 60Hz.
> It is reported (for me) when using -v playback:
> 2007-03-12 09:52:04.014 VideoOutputQuartz::GetRefreshRate() [returning 150]

Hmm,.   I grep'd my log for that, and it is also returning150.  So, I
looked in videoout_quartz.cpp, and it looks like 150 is the value it
uses if it doesn't get a valid refresh rate:

    // Find the refresh rate of our screen
    CFDictionaryRef m;
    m = CGDisplayCurrentMode(data->screen);
    data->refreshRate = get_float_CF(m, kCGDisplayRefreshRate);
    if (data->refreshRate == 0.0)    // LCD display?
        data->refreshRate = 150.0;   // Divisible by 25Hz and 30Hz
                                                           // to
minimise AV sync waiting

I'm not sure how that effects playback, but it seems to be the
expected behavior for LCDs, and playback is okay on mine.  So, I would
guess this is not the issue.

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