[mythtv-users] deinterlacing and non-smooth playback at 1080i

[Phill Edwards]

> > I looked through my mythfrontend log and can't find anything that says
> > what the refresh rate is - even if I do --verbose all. Is there
> > something else I need to do to get this showing up in the log?
>
> Should be there.  Probably above the "refresh rate too low for bob
> deint" message.

Doh - found it!

2007-05-24 21:45:00.409 Set video sync frame interval to 40000
2007-05-24 21:45:00.409 Video sync method can't support double
framerate (refresh rate too low for bob deint)
2007-05-24 21:45:00.450 Set video sync frame interval to 40000
2007-05-24 21:45:00.453 Using deinterlace method onefield
2007-05-24 21:45:00.454 Using audio as timebase
2007-05-24 21:45:00.454 Video timing method: RTC
2007-05-24 21:45:00.454 Refresh rate: 20040, frame interval: 40000

So my refresh rate is slightly bigger than half the frame interval.
xvidtune -show gives:
"1280x720"     74.25   1280 1720 1760 1984    720  725  730  750 +hsync +vsync

Do I just fiddle around with the 74.25 number until I get a refresh
rate less than 20000? Is there any science to how I change it - up,
down, or just trial and error?

Regards,
Phill