[mythtv-users] MythTV and interlacing

[Andy Burns]

On 30/06/2008 06:23, Bradley Kite wrote:

> I've just built myself a VGA to Scart converter as per:
> http://gentoo-wiki.com/HOWTO_Setup_X_for_MythTV - the picture quality
> is a lot better, but I'm trying to figure out some deinterlacing
> stuff.

On my previous myth box I did the same, likewise the quality was much 
better than using TVOUT.

> I'm driving X with the following modeline:
> 
> ModeLine "720x576 at 25i" 13.5   720 732 795 864  576 581 586 625
> interlace -hsync -vsync
> 
> As I am now using a naturally interlaced display mode, and I'm playing
> interlaced content on an interlaced display, I would have thought that
> I could turn off MythTV's de-interlacing? 

That was what I expected too, though I always found using de-interlacing 
provided a better looking picture, for a while this bothered me, as I 
was trying to achive "less processing is best", eventually I decided 
that whatever looked best, was best.

I've tried it but I still
> get the tearing etc. which I thought would have disappeared in such a
> scenario.

I didn't get tearing, is your card allowing vertical retrace 
synchronisation?