[mythtv-users] TV Out quality problems (nvidia)
johnny at fishcounts.com
Fri Jul 16 14:53:52 EDT 2004
> I finally got my TV out working (turned out I had defective hardware
> before.) It's working, but I have two main problems: color and motion.
> First, on color. The picture on the TV appears washed-out -- not enough
> contrast or color, perhaps. However, the reds are extremely vibrant in
> some instances, so turnnig up the color level control on the TV only
> makes things worse. I've played with both the TV color controls and the
> color options in the TV and Xv panels of nvidia-settings, but just can't
> seem to get it right. When I look at the same recordings on a VGA
> monitor or a laptop LCD, they look just fine, so I don't believe my
> PVR-250 capture card is to blame. (Though I could be wrong.)
> Secondly, on motion. When there is motion -- a panning camera, for
> instance -- things look bad on the TV. I have tried things without the
> deinterlace or jitter reduction turned on. When I have those off, I see
> interlacing effects on the TV -- horizontal lines offset from each
> other, like I would expect to see on a VGA screen. But I do not see
> those effects when watching a signal hooked up directly to the TV.
> If I turn on deinterlace and jitter reduction, then a panning camera
> results in an image that is, well, jittery.
> Either way, it's hard to watch.
> I live in the US and have an NTSC setup. My TV is a 29" Sony and I've
> using SVIDEO to hook it up. It is not an HDTV unit or anything like
> that, and AFAIK, cannot do progressive scan.
> I have a nforce2 motherboard with an intergrated GeForce4 MX (NV18) GPU,
> which features integrated TV out. I'm running nvidia's drivers, version
> 6106. I have Debian unstable on this box and X 4.3.0.dfsg.1-5.
> Here are some snippets from my XF86Config:
> Section "Device"
> Identifier "Generic Video Card"
> Driver "nvidia"
> Option "TVStandard" "NTSC-M"
> Option "TVOutFormat" "SVIDEO"
> Option "ConnectedMonitor" "TV"
> Option "NoLogo" "true"
> Option "HWCursor" "true"
> Section "Monitor"
> Identifier "Generic Monitor"
> HorizSync 30-50
> VertRefresh 60
> #Option "dpms"
> I'm running at 800x600.
> Also, one other weird problem: whenever MythTV is generating a screen
> that is black or mostly black, my TV thinks that it's lost the SVIDEO
> signal. As soon as the output brightens up, the TV is back to normal.
> Thanks for any suggestions.
> -- John
> mythtv-users mailing list
> mythtv-users at mythtv.org
This has been addressed several times. Search the list for previous
answers to your questions.
#1 you have a BT8x8 card and need to use the adjust filter to make it look
#2 you should use the latest nvidia 6106 driver to get interlaced output
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