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

[zoiks2004-ivtv at yahoo.com]

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]"
> 
>   ##
>   Option       "TVStandard"  "NTSC-M"
>   Option       "ConnectedMonitor"  "TV"
>   Option       "TVOutFormat"  "SVIDEO"
>   Option       "TVOverScan"  "0.8"
>   ##
> EndSection
> 
> 
> Any help is greatly appreciated!
> 
> Thanks!
> 
> 
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