[mythtv] Idea for interlaced playback.

Cory Papenfuss papenfuss at juneau.me.vt.edu
Mon Nov 14 09:41:15 EST 2005


On Mon, 14 Nov 2005, Bjorn Konestabo wrote:

> Cory Papenfuss wrote:
>
>>     Have you tried simply programming a non-VGA-friendly (i.e. 480i) 
>> modeline and using the Xv VBLANK sync as-is?  I don't have a tvout card 
>> that doesn't suck, but perhaps the chip gets smarter about it when it 
>> doesn't have to temporally scale anything.
>
> That would be 576i in my case, but yeah, I have. I also verified that the VGA 
> was interlaced on my monitor which barely managed to synch the signal
> although it didn't look (or sound) too happy about it. :), but the 
> interlace-keyword had no discernable effect on the TV-out. I think my 
> solution may be
> to get a new card. It's pretty crappy even by 5200FX standards. The VGA 
> connection is attached by a ribbon cable and the signal quality on it is 
> awful.
>
 	I'm surprised that the VGA monitor synced to it... most of them 
crap out below about 28kHz... PAL is 15.625kHz.  It's quite likely to 
break the monitor running out of spec like that.

 	TVout is a complete unknown on proprietary cards like that.

-Cory

-- 

*************************************************************************
* Cory Papenfuss                                                        *
* Electrical Engineering candidate Ph.D. graduate student               *
* Virginia Polytechnic Institute and State University                   *
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