[mythtv-users] How I got great quality TV-out on my nVidia MX4000

Brian J. Murrell brian at interlinx.bc.ca
Wed Mar 9 17:15:55 UTC 2005


On Wed, 2005-03-09 at 12:07 -0500, Cory Papenfuss wrote:
>  	If by "properly overscanned" you mean not seeing all 720x480, then 
> yes, it is.

Sweet.  I am totally jealous dude.

>   It's actually pretty easy to change the horizontal 
> overscanning by just padding the sides with black, but keeping the active 
> video the same.

Indeed.  But I would want it to look exactly like it did on the original
broadcast.

> Changing the vertical 
> overscanning is a different story, since you're stuck with the 525 lines 
> for NTSC.  If you want it underscanned vertically, you'd need to reduce 
> the number of active picture scanlines down from 480.

Yech.  Yeah.  Good thing I am not interested in that.  :-)

> That's what all the 
> tvout over/underscanning adjustments are doing... they just don't tell 
> you that in so many words, and do some scaling in the scanline conversion. 

Blech.

So, when you going into production with your transcoders?  :-)

Seems ATI sells a DVI->component converter for their 8500 and 9xxx cards
for $29.  Perhaps that is the way to go.  That should work with an SDTV
with component video connections no?  Maybe cheaper than the cheapest
vidcard you would want to buy and then an additional U$129 for the Audio
whatsitcalled thingy I posted about earlier.

b.

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