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

[David Asher]

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]"
>>>>
>>>>   ##
>>>>   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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>>>>
>>>>         
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