[mythtv-users] Correct way to de-int NTSC on nVidia MX440?

[zoiks2004-ivtv at yahoo.com]

That's curious: I see no such checkbox under the
deinterlace method.  Is this something in version
0.19?  (Frankly, I'm using 0.18.1 at the moment, 0.19
is scaring me what with all the messages about
frontend crashes, etc. WAF could dive to new lows if
this "production" unit goes south for long.)

Are there significant improvements in deinterlace and
sync'ing in 0.19 for NTSC?

--- David Asher <david.asher at caviumnetworks.com>
wrote:

> I found when I use Bob, I need to use OpenGL Vsync
> to prevent flicker.  
> The checkbox is right under the deinterlace method.
> 
> This is with a FX5200 to a 720p modeline.
> 
> David.
> 
> zoiks2004-ivtv at yahoo.com wrote:
> > Thanks, I'll try it out with my Monster RF
> modulator. 
> > I'm suspicious, though, that such a difference in
> > image quality might be due to the S-Video input to
> the
> > TV.  I did manage to improve overall video quality
> > using "nvidia-settings".  (Of course, I checked
> all
> > the "sync to v-blanks".)
> >
> > In any event, my main problem remains: syncing
> myth's
> > output to the TV so I can use bob deinterlace. 
> Has
> > anyone managed to do this with nVidia S-Video (SD)
> > output?
> >
> >
> > --- Jeff Roberts <jeffsmu at gmail.com> wrote:
> >
> >   
> >> not sure how helpful my info is, but I've played
> >> with a variety of pci
> >> geforce cards with s-video out, with mostly the
> same
> >> results.  im
> >> pretty sure that one of them was an mx440.  the
> >> s-video looked like
> >> crap no matter what i did on any of them.  one
> day
> >> for fun i ran the
> >> s-video into an rf-modulator that was run into
> the
> >> tv, set to channel
> >> 4.  the picture looked so much better that i just
> >> left it that way,
> >> even though its sort of hokey.  dont know what
> the
> >> rf modulator does
> >> to the signal but it sure makes it look better.
> >>
> >> On 2/23/06, zoiks2004-ivtv at yahoo.com
> >> <zoiks2004-ivtv at yahoo.com> wrote:
> >>     
> >>> Bump.
> >>>
> >>> Is there really no one who knows how to get this
> >>> working?
> >>>
> >>> Alternatively, does anyone know that you *can't*
> >>>       
> >> get
> >>     
> >>> this working correctly.
> >>>
> >>> Graphics card: MX440 nVidia-based with S-Video
> out
> >>> Myth: 0.18.1-fixes
> >>> Deint desired: Bob
> >>>
> >>>
> >>> --- zoiks2004-ivtv at yahoo.com wrote:
> >>>
> >>>       
> >>>> Is there a decent way to deinterlace NTSC with
> >>>>         
> >> the
> >>     
> >>>> S-Video output on an nVidia MX440?  I just
> can't
> >>>> seem
> >>>> to get it right.  I have a 37" Toshiba (non HD)
> >>>>         
> >> TV,
> >>     
> >>>> so
> >>>> artifacts from the interlacing are quite
> >>>>         
> >> obvious.
> >>     
> >>>> I've found that only the bob ('n weave)
> >>>>         
> >> deinterlace
> >>     
> >>>> truly deinterlaces properly.  (Though I think
> >>>>         
> >> kernel
> >>     
> >>>> deinterlace and linear blend may look a tad
> >>>>         
> >> better
> >>     
> >>>> than not deinterlacing.)  The problem is, bob
> >>>> deinterlacing doesn't maintain sync, so when
> I'm
> >>>> watching video, it will go in and out of
> >>>>         
> >> jittering
> >>     
> >>>> the
> >>>> image.  When it's in sync it looks great.
> >>>>
> >>>> I've tried to run nvtv on the box, but it
> always
> >>>> segfaults.  I eventually found in the
> >>>>         
> >> documentation
> >>     
> >>>> for nvtv that it won't work with MX440 video
> >>>>         
> >> cards.
> >>     
> >>>> Anyway, if anybody out there has managed to get
> >>>>         
> >> good
> >>     
> >>>> deinterlacing with the TV output from a MX440,
> >>>>         
> >> I'd
> >>     
> >>>> really like to know how it's done.  Is there
> >>>>         
> >> some
> >>     
> >>>> way
> >>>> to align the scanlines of the TV out to
> >>>>         
> >> every-other
> >>     
> >>>> line in the 640x480 screen, for example?
> >>>>
> >>>> FWIW, the modeline I'm using for video output
> >>>>         
> >> is:
> >>     
> >>>> ModeLine      "640x480" 25.20 640 664 760 800
> >>>>         
> >> 480
> >>     
> >>>> 491
> >>>> 493 525
> >>>>
> >>>> The monitor section looks like this:
> >>>> Section "Monitor"
> >>>>   DisplaySize  240 180  # mm
> >>>>   HorizSync 30-50
> >>>>   Identifier   "Monitor[0]"
> >>>>   ModelName    "M991"
> >>>> #  Option       "DPMS"
> >>>>   VendorName   "Toshiba"
> >>>>   VertRefresh  60
> >>>>   UseModes     "Modes[0]"
> >>>> EndSection
> >>>>
> >>>> And the "device" section looks like this:
> >>>> Section "Device"
> >>>>   BoardName    "GeForce4 MX440SE"
> >>>>   BusID        "1:0:0"
> >>>>   Driver       "nvidia"
> >>>>   Identifier   "Device[0]"
> >>>>   Screen       0
> >>>>   VendorName   "NVidia"
> >>>>   Option       "NvAGP" "1"
> >>>>   # Option       "NoLogo" "true"
> >>>>   Option       "HWCursor" "true"
> >>>>   Option       "RenderAccel" "true"
> >>>> EndSection
> >>>>
> >>>> While the module section looks like this:
> >>>> Section "Module"
> >>>>   Load         "glx"
> >>>>   Load         "type1"
> >>>>   Load         "extmod"
> >>>>   Load         "dbe"
> >>>>   Load         "freetype"
> >>>>   Load         "v4l"
> >>>> EndSection
> >>>>
> >>>> In the "Screen" section I have
> >>>> Section "Screen"
> >>>>   DefaultDepth 24
> >>>>
> >>>>   SubSection "Display"
> >>>>     Depth      24
> >>>>     Modes "640x480" "400x300" "320x240"
> >>>>     Viewport   0 0
> >>>>   EndSubSection
> >>>>
> >>>>   Device       "Device[0]"
> >>>>   Identifier   "Screen[0]"
> >>>>   Monitor      "Monitor[0]"
> >>>>
> 
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