[mythtv-users] VDPAU picture degradation, possibly since 0.24 to 0.25 switch

[Paul Gardiner]

On 19/08/2012 21:33, Free Denizen wrote:
> On Sun, Aug 19, 2012 at 12:40 PM, Paul Gardiner <lists at glidos.net> wrote:
>> When I'd noticed that sort of discolouration before,
>> I'd put it down to the source, but I realised tonight,
>> that if it was the source, it should be impossible to
>> adjust it out. That's where I got the evidence that
>> the problem with the frontend: I found that I could
>> adjust it out, but only by adjusting Myth's settings,
>> not by adjusting my TV; it seems the RGB values are
>> being clipped before getting to my TV, hence it must
>> be Myth that's doing the clipping.
>
> even if it is the source you may have been able to adjust it such that
> it appeared more normal.  Try playing it back with vlc, or if you have
> recording from 0.24 see if those exhibit the problem.

Yes, you are right. I just realised the flaw in my logic. If
the source has out of range Y then Myth can correct it
before the RGB conversion, but once the conversion is
done it is too late, so the TV can't correct it.

Also I just did some tests with samples from the AVCHD
Blu-ray and my set up is pretty much perfect. I guess
I was imagining the degradation.

Thanks for the replies - you, Richard and Michael.

Cheers,
     Paul.