[MPlayer-users] VDPAU errors, flickering black video display on aspect change in MPEG2 TS

[Reimar Döffinger]

On Sun, Dec 08, 2013 at 04:22:48PM +0100, wm4 wrote:
> On Sun, 8 Dec 2013 16:01:17 +0100
> Reimar Döffinger <Reimar.Doeffinger at gmx.de> wrote:
> 
> > On Sun, Dec 08, 2013 at 03:49:12PM +0100, wm4 wrote:
> > > On Sun, 8 Dec 2013 14:52:43 +0100
> > > Reimar Döffinger <Reimar.Doeffinger at gmx.de> wrote:
> > > 
> > > > My best explanation is that this is a NVidia driver bug, there is no
> > > > reason the decoder should care about aspect changes.
> > > 
> > > Of what nature would this bug be? I can see no problems on mpeg2 vdpau
> > > decoding with nvidia drivers on non-mplayer. Is it triggered by
> > > libavcodec threading? (I think I heard something about threading.)
> > 
> > The driver claims that there is a size mismatch even though no size
> > anywhere changed, only aspect.
> > More specifically, reinitializing the decoder _with exactly identical
> > settings_ fixes a VDP_STATUS_INVALID_SIZE error, which doesn't make any
> > sense.
> > You probably see no issues anywhere because everyone else uses the same
> > overkill approach of doing a complete reinitialization for no good
> > reason on an aspect change.
> 
> Well, personally I reinitialize the decoder _only_ if the actual size
> changes. So I see no bug here.

Well, I would need a sample for this specific issue to make sure,
but how do you explain this bug then?
In particular, the fix of just creating a decoder with _exactly the same
settings_ fixes a VDP_STATUS_INVALID_SIZE, can you come up with any
explanation for that, that is not a driver bug?