[mythtv-users] Nvidia tvout picture quality

[huffman at graze.net]

Discussion about mythtv <mythtv-users at mythtv.org> wrote: 
> HI!
> 
> After much fiddling, I have now a pretty good NVidia TV-out (card is 
> ASUS GeForce FX 5200).
> 
> I have these things set:
> - display depth = 16 (however I don't think this is needed)
> - jitter reduction on
> - extra audio buffer on
> - kernel deint
> - mythfrontend reniced -2, X reniced -12
> 
> This looks very good (regarding interlace artifacts and smoothness) 
> compared to the default settings.
> 

What is your setup?  OS?  Version of Myth?

Thanks,
Brian


> Thomas
> 
> David Collett wrote:
> > Hrmm,
> > I'm interested in other peoples opinions on the best settings (deint,
> > xvmc etc) to use with NVIDIA cards also.
> > 
> > Randy, are you using the TV-out of your nvidia card or is your TV
> > vga-capable? Which TV-out connector are you using (composite/s-video)?
> > 
> > I used to use TV-out on an mx440, and it also sucked, then I got a
> > secondhand H+(dxr3) mpeg2 decoder card with TV-out, man that thing
> > looked so much better its not even funny. It wont work with mythtv to my
> > knowledge though. (I was using VDR at the time)
> > 
> > Now I am back to using an mx440 (nforce2 onboard video to be specific)
> > connected via VGA to my new 32" HD CRT and it is a lot better than the
> > TV-out (svideo/composite) of the nvidia card. But not as good for
> > smoothness as the old H+.
> > 
> > A few points I have noticed:
> > (FYI, my TV is doing 1280x720 progressive @60Hz, fed by the VGA of
> > nforce2 onboard video, video signal is dvb HDTV (original format
> > 1440x1080 interlaced), mythtv version is cvs the day B4 0.16; "deint"
> > below refers to any deint algorithm.
> > 
> > - no deint + no xvmc = total crap (visible interlacing artifacts), CPU=?
> > 
> > - no deint + xvmc = very smooth, no visible interlacing artifacts (xvmc
> > doesnt seem to need a deinterlaced signal?), but visual quality is not
> > great(colours not as vibrant, appears 'grainier'), CPU=20%
> > 
> > - deint + xvmc = smooth, but blocky, the deint seems to screw with xvmc
> > to the point where it looks better without it. Also, I have had frontend
> > crashes with some deint algos + xvmc. CPU=20%
> > 
> > - deint + no xvmc = excellent visual quality (varies slightly depending
> > on deint algo), but not quite as smooth as xvmc. CPU=60%
> > 
> > Based on smoothness and CPU usage, xvmc would be perfect, but the image
> > quality just is not there, is this ever likely to change? or is it
> > beyond the control of the application?
> > 
> > NVIDIA users: What deint/xvmc combinations are you using???
> > 
> > Dave
> > 
> > 
> > 
> > On Tue, 2004-09-14 at 12:50, randy ferrill wrote:
> > 
> >>My system :
> >>
> >>AMD Athlon xp 1800
> >>
> >>384meg sdram
> >>
> >>120gb Maxtor hd
> >>
> >>pvr250
> >>
> >>Nvidia 440mx
> >>
> >> 
> >>
> >>Issue, the picture quality using my antenna compared to my normal tv
> >>signal is not as bright nor are the whites really white. If I adjust
> >>the brightness to get the colors brighter then in brighter scenes it
> >>is overly bright and washed out. Currently this is ok on my 27
 tv but
> >>I have a projector in the works (2nd revision) and it is capable of a
> >>picture over 8 wide indoors (used it outside and got a great 25x16
> >>on the side of my house) So I want to drive it with my Mythtv box and
> >>this is my stumbling point.
> >>
> >> 
> >>
> >>Also I am assuming that the flick during high speed panning is the
> >>video card not being fast enough to smoothly display , Can anyone
> >>recommend a inexpensive Nvidia replacement ? How does the 5200 rate?
> >>
> >>
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> >>
> >>
> >>
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> > 
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