[mythtv-users] motion blur with Bob, XvMC (nvidia) on 1080i content run at 576i

[David Schlenk]

On Thu, May 15, 2008 at 4:44 PM, David Schlenk <mythtv at schdav.org> wrote:
> On Thu, May 15, 2008 at 4:17 PM, Misty P <mistyp at thekorn.net> wrote:
>> David Schlenk wrote:
>>>> Not in front of a machine right now, so not sure if nvidia-settings
>>>> would do it.
>>>>
>>>> I'd look through /var/log/Xorg.0.log , looking for EDID information.
>>>> (hopefully your television is sending an EDID!)
>>>>
>>> This is all I get from the nvidia driver in the Xorg log:
>>
>> (snip)
>>
>> Sorry, didn't realize you were using the TV-out; made the assumption you
>> were running a VGA or DVI cable.  (don't know *why* I assumed that, just
>> did.)  You won't get any EDID information via the tv-out.
>>
>> For the tv-out, nvidia cards seem to offer only the classic 4:3 modes (at
>> least with an s-video cable, not sure about component)... 1024x768, 800x600,
>> 640x480, and after that who cares.
>>
>>
>> You should read this document; it has all the nitty gritty, direct from
>> nvidia:
>>
>> ftp://download.nvidia.com/XFree86/Linux-x86/1.0-8774/README/appendix-h.html
>>
>>
>> But back to your question as to what modes will work with your TV, I see no
>> other option than to simply try a few and see what works.  (Might want to
>> switch your TV standard from HD576i to either HD780p or HD780i , btw.)
>>
>>
>> I'd also **highly** recommended that you install SSH before mucking about,
>> so that you can get in and change things if you're "blind".  That way if
>> something doesn't work, you can change it back.  (Also backup your good
>> xorg.conf file before messing with it!)
>>
>>
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>
> I've tried them all, and unfortunately none of the progressive ones
> seem to work except 480 but then I get a so-small-its-silly virtual
> resolution, and 1080i makes the baby jesus cry (apparently the 6200 is
> bad at doing that non-fuzzy and my tv squishes it to fit 4:3 in any
> event...  but maybe the DPI trick in reverse would fix that?). AFAIK
> 720i doesn't exist according to the doc.
>
> The closest I got to a successful setup was forcing 1920x1080 using
> HD1080i. No deinterlacing problems, but the screen was fuzzy and it
> was squished.
>
> Sounds like I need a new TV. ;)
>
> I'll give HD576i with a forced 720x576 virt. res. and also 704x576 (is
> that the 4:3 equiv?) but would any of those solve it? What refresh
> rate is nvidia sending through component? Right now I'm not specifying
> HorizSync or VertRefresh because I have no idea what the right values
> are for my TV. Should I try 30-50/60? Could it hurt the TV?
>

Well for some unknown reason HD576i with a resolution of 720x576 seems
to work! The motion lines are gone and playback is smooth. Thanks
everyone, especially Misty P. I owe you a beer.