[MPlayer-dev-eng] [PATCH]hqscaling for VDPAU

[Uoti Urpala]

On Wed, 2009-11-04 at 12:01 +0000, Carl Eugen Hoyos wrote:
> Uoti Urpala <uoti.urpala <at> pp1.inet.fi> writes:
> 
> > > 2) MPlayer policy is "latest library version"
> > 
> > IMO it's too early to drop support for older driver versions. Few people
> > have the latest release installed yet, and it may not even be available
> > in various distro packaging systems. This is not such an important
> > feature that it'd justify dropping support for older versions a week
> > after the new one is released.
> 
> It has been two months, and we update libx264 support typically the same (or the
> next) day.

Two months since what? Isn't 190.42 the first official release that
supports this? It was released on 2009-10-29. Yes beta versions have
existed for longer, but we shouldn't require beta versions of drivers
that can break the whole desktop.

Some of the fast libx264 updates have been for versions that were not
backwards compatible, so the choice was between not supporting old at
all or not supporting new at all (or adding more complicated
workarounds).

> > > 3) 1080 <at> 60 is simply not supported by VDPAU
> > 
> > What do you mean by this? Where does VDPAU documentation say anything
> > about frame rate limits?
> 
> Level 4.1 is the limit (of course not VDPAU limit, but NVIDIA's implementation
> limit - sorry if this was unclear). But I agree that Serguei's sample it
> probably 1080 at 30.

That may be the minimum supported level of bitstream features, but I
don't believe it's meant to imply a limit on supported decoding *speed*.
Decoding a stream at a higher fps only requires doing it faster, and the
cards openly differ in how fast they can do decoding.