[mythtv-users] ATI Interlacing questions

Brandon Stoll mrmagoo at mrmagoo.org
Thu Jan 19 00:12:13 UTC 2006


On 1/18/06, Dan McCarthy <mccadan at gmail.com> wrote:
> Hi,
>
> I have a couple of questions about interlaced output with an ATI card.
> I am using an ATI 9200 with TV out with the ATI fglrx binary driver
> and svn mythtv. I capture from a dvb-t card.
> I am getting interlacing artifacts on the displayed video. These are
> chunky lines to the left or right of the image during motion.
>
> I understand that the SDTV DVB signal is interlaced. Does this mean
> that I would need to use software deinterlace when using the TV out,
> or is this handled automatically by the card? Is the TV out just some
> kind of mirror output of what is shown on a monitor or is it treated
> completely differently by the card?
>
> Also, I have the screen resolution set to 800x600. Should I be setting
> this to 576x720 for SDTV PAL with a modeline (if possible) to avoid
> any issues with image scaling before it goes out the TV out?
>
> Thanks,
> Dan

Do you want interlaced output or deinterlaced output?  If the first,
you can't with an ATI card.  Even the newer nvidia drivers are broke
from what I understand.

I think what you want is in the settings under Playback, on the first
page at the top: there is a box to enable deinterlacing.  The
different types vary on how much CPU% they use and how well they work.


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