[mythtv-users] Playback vid corruption with 1080i (with pics)

john sturgeon john.sturgeon at gmail.com
Thu Jun 23 16:45:40 UTC 2005

On 6/23/05, Doug Larrick <doug at ties.org> wrote:
> Glen Dragon wrote:
> > I'm still seeing the problem that I reported a week or so ago.  I took
> > some pictures to show the effect. Hopefully someone knows something.
> > Interestingly enough it is also causing the same effect on the OSD.
> > Pics:     http://www.jetcom.org/gallery/dragon-myth
> > (There is some bluring due to difficulties in taking the picture, as I
> > didn't have the tripod around. It really does look like that tho)
> >
> > I've tried different nvidia drivers (7664, 7167, 6629) no difference.
> > I'm not sure what else to try.
> Deinterlacing is clearly not working in these pictures.  The stripes are
> so wide because something (probably your video card) is scaling the
> pictures to a resolution less than 1080 lines high.  Double-check you
> have deinterlacing enabled, and check the output from 'mythfrontend
> --verbose playback'.  Also note that bob deinterlacing is disabled if
> you're playing at a speed other than 1x.
> -Doug

Doug is right on.  That is classic when resizing non-deinterlaced
content.  You can also see this problem if your filter chain is in the
wrong order, and you resize *before* deinterlacing.  You should always
de-interlace prior to resizing.

John <><

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