[mythtv-users] What does vdpaucolorspace=itu601 do?

[E. Westbrook]

I've been trying to optimize these settings too, and maybe I can help you in
exchange for some help for myself.  :)

I see on the wiki (http://www.mythtv.org/wiki/VDPAU) that vdpaucolorspace
"Sets ITU BT601 and ITU BT709 (BT709 for HD videos and BT601 for SD) colour
spaces, by default or automatically."

I found some background on the specifics of these here:

   - http://en.wikipedia.org/wiki/Rec._709
   - http://en.wikipedia.org/wiki/Rec._601

I also see that the wiki says "Why/when it should be used: always, used in
MythTV default profiles."  So this sounds like something I should make sure
is set too, as well as the others listed there that are recommended for my
card..

What I don't see, is where to set it.  I'm running 0.23-fixes (26437) and
while the wiki says it's in "Utilities/Setup -> Setup -> TV Settings ->
Playback -> Playback Profiles -> Custom Filters" -- In my screens, I don't
see a "Custom Filters" label in my "Playback Profiles" page in those
settings.  I do see the selector for Playback Profile (with "add new" and
"delete"), then the elements of that profile, which one can edit
individually.  Nothing in this page or anything to which I can drill from
there is labeled "Custom Filters".  Is this a documentation mismatch or a
brain fart on my part?

HTH and thanks for any help too,
EW

On Sat, May 29, 2010 at 01:59, Paul Gardiner <lists at glidos.net> wrote:

> I've just joined the wonderful world of vdpau and I'm
> trying to tweak out every last bit of quality from it. I'm
> confused though about the vdpaucolorspace setting. From
> what I can find on the web, itu601 doesn't define a single
> color space. There are all sorts of them, and particularly
> PAL and NTSC differ. Is that right?
>
> Does the itu601 setting refer to the NTSC color space?
>
> Does auto mean use itu709 for HD and whatever itu601 is
> for SD?
>
> I'm in the UK, and all my SD content is supposedly PAL.
> From what I read, PAL and itu709 are almost identical,
> so should I be using vdpaucolorspace=itu709?
>
> Paul.
>
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