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

[James Buckley]

On 23/05/07, Mark Kendall <mark.kendall at gmail.com> wrote:
>
> On 5/22/07, James Buckley <xanium4332 at googlemail.com> wrote:
> > > When you say 'beefier gpu' what kinda performance card are we talking
> > about. Would a NVidia 7600 do, or the new Intel GMA X3000. Some new
> intel
> > boards are gonna be coming out with integrated hdmi out (powered by an
> intel
> > gpu, acclaiming DirectX 10 compatability (not that I care about that,
> just
> > the performance)). Don't know whether it is just a modified X3000, or
> > actually a new chip altogether. It's the 'bearlake' chipset (review of
> one
> > of the non hdmi boards here:
> >
> http://www.engadget.com/2007/05/22/intels-p35-bearlake-chipset-gets-benchmarked-reviewed/
> > ).
> > >
> > > Hopefully the boards will have good linux support, including the
> graphics,
> > which means that 1080i over 1080i DVI/HDMI will actually be possible,
> and if
> > the gpu is powerful enough full opengl playback may be possible.
> >
> > Just to add to my email above, for example is there a card available
> that
> > could handle 1080i with BOB deinterlacing using the opengl renderer.
> Also,
> > what limits do you think a 7600GT could handle (resolution,
> deinterlacing
> > methods). If yu don't know no problems, just you are the first person I
> know
> > who's actually used it.
> >
> > Also, using the opengl renderer (which I like the look of). Is is
> possible
> > to playback (ignoring current performance limitations) interlaced
> material
> > over an interlaced connection properly (e.g. 1080i on 1080i), is it
> actually
> > capable of syncing to the right phase ( i.e. even w/ even, and odd w/
> odd)?
> >
> > Sorry for all the questions, just I'm deeply interested in the opengl
> > rendering (the benefits look good, and not many negatives apart from
> card
> > requirements).
> >
> > Thanks in advance, James
>
> James
>
> I'm using a 7600GS. This copes with pretty much anything I throw at it
> up to 720p display size and source (i.e. all hardware deinterlacers,
> full size osd etc). At 1080i it struggles with hardware deinterlacing
> - not sure whether software bob will work.
>
> 1080i display/source without deinterlacing is pretty good and it will
> sync with the display with patches applied. I still can't get it to
> sync 100% of the time though and still need to stop/restart and hope
> it picks up the correct timing.
>
> You've got the card to test it to the full - so give it a go!
>
> Regards
>
> Mark


Thanks (and sorry for the threadjack), the card hasn't actually arrived yet,
but will do soon. It'll be a 7600GT w/ HDMI out (the reason I ordered it).
Maybe the extra little umph from the GS -> GT might just get it to cope, if
not, then oh well.
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