[mythtv-users] Good old XvMC .. don't you love it

Damian damian at gingermagic.co.uk
Fri Sep 14 16:19:32 UTC 2007

Dylan Semler wrote:
> On 9/14/07, *Damian* <damian at gingermagic.co.uk 
> <mailto:damian at gingermagic.co.uk>> wrote:
>     1) What's the best way to tell if it's working or not?
>     I find the frontend log confusing.
>     Times when I've thought that it is working, the fronend it thowing out
>     all sorts of odd info.
>     Time when I've though it's not it's throwing out different info.
>     What should I be looking for?
> As you've since noted, grey OSD is probably the best indicator that XvMC 
> is enabled and being used

Yes, I thought that too. I just wondered whether the other option I had 
to turn on (is it OpenGL sync or something .. on the same page) had 
cause the grey OSD instead.

>     2) Is it still the case that BOBx2 is the only deinterlacer that works
>     with XvMC or is that old information (it's in the Myth guide I was
>     looking at)
>     My previous de-interlacing preference was 'kernel' 
>  From what I remember BOB is the only option, but I'm not too confident 
> about this.

Right, thanks. That was another thing that confused me as I had the 
flickery grey OSD with various different deinterlacing methods.

>     3) The times when I've thought that I did have XvMC working, it's had
>     kind of flickery lines at the top and/or bottom of the screen and and
>     logos on screen look flickery. Is that normal?
>     Is XvMC a sacrifice in quality for the sake of speed?
>     I thougth it was just a speed increse.
> XvMC, when done properly, should result in the same quality video 
> without artifacts, flickering or anything.  Unfortunately, I'm not sure 
> where your issues are coming from.  What video card do you have?

I have a nVidia 5200 card.
Getting a flicker at the top or bottom of the screen and I think it was 
around solid blocks of colour too (eg logos), but that could have been 
due to a deinterlacing method I suppose.

>     It's frustrating that I spend most of my day at a Windows machine, which
>     is where my email is set up for this list. It makes it so much harder to
>     just send a few lines from the logs to enquire about.
> I'd take up the time to set up SSH and use putty with 
> windows--invaluable for remotely accessing your machine.

That's just reminded me that I did set that up in the past. I just never 
think of it with myth because I feel I need to be looking at the results 
of whatever changes I make.

> -- 
> Dylan

Thanks for your help Dylan!


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