I have a very similar setup, DVB-T to a widescreen TV via a Geforce MX. I agree, the native TV out of the vid card is a little disappointing. Instead, quite a few people on this list (me included) are using home-built VGA -> SCART converters. Don't bother trying to buy one of these since they will all of the retail versions use scan conversion which really lowers the quality.
Take a look at the following sites for details: http://www.hut.fi/Misc/Electronics/circuits/vga2tv/ http://www.nexusuk.org/projects/vga2scart/index.php http://www.sput.nl/hardware/tv-x.html Personally I went for the last site listed. This will give you RGB output to the TV, you can just output the raw interlaced DVB-T signal (no de-interlacing required) and each horizontal line of pixels generated by your vid card will map natively to a scan line on the TV. The image quality is fantastic, noticeably crisper than my Sony set-top-box using RGB output. You might be able to tweak the S-video output a little but it'll never come close. Steve On Fri, 17 Dec 2004 00:21:47 GMT, Tom Hughes <[EMAIL PROTECTED]> wrote: > My newly built Myth box is outputting DVB-T recordings to a > widescreen TV over S-Video from a GeForce 4 MX card but the > output quality seems to be somewhat lacking. > > I using this modeline at the moment, which I found on the mailing > list: > > ModeLine "720x576x50" 27.1 720 736 880 896 576 578 579 606 > > The 720x576 resolution matches most UK DVB transmissions, although > some are 704x576 instead. I also have these options set: > > Option "TVOverScan" "1.0" > Option "TVStandard" "PAL-I" > Option "ConnectedMonitor" "TV" > Option "TVOutFormat" "SVIDEO" > Option "NoLogo" "true" > > Note that overscan is turned up to the maximum value. I'm using > the ATrpms 0.16 build of Myth and the 6629 NVidia drivers. > > The first problem is that although the image reaches the right > side of the screen it doesn't quite meat the left edge, and there > are large gaps at the top and bottom. > > The second problem is that the picture just isn't as crisp and > clear as the output from my set top box. That is using RGB so > will be a little better, but my DVD player uses S-Video and does > better than the Myth box. > > Finally there are strange motion artefacts, with are particularly > noticeable on credits, especially horizontally scrolling ones but > vertically scrolling ones also show it. Is this perhaps a frame > sync issue? Do the ATrpms builds have OpenGL sync support turned > on or not? > > Thanks for any help people can offer, > > Tom > > -- > Tom Hughes ([EMAIL PROTECTED]) > http://www.compton.nu/ > > > _______________________________________________ > mythtv-users mailing list > [EMAIL PROTECTED] > http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users > > >
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