[mythtv] NVidia Pixellation

David Engel david at istwok.net
Fri Aug 31 15:33:44 UTC 2018


On Sun, Aug 05, 2018 at 02:41:03PM -0500, David Engel wrote:
> On Sun, Aug 05, 2018 at 11:20:56AM -0700, Aman Gupta wrote:
> > On Mon, Jul 30, 2018 at 2:41 PM Peter Bennett <pb.mythtv at gmail.com> wrote:
> > > On 07/30/2018 04:26 PM, Aman Gupta wrote:
> > >
> > > Aman, do you have a good connection at Nvidia?  My local ABC station
> > >> seems to have again started sending streams that show corruption when
> > >> decoded with MediaCodec (and VDPAU, for that matter), but not when
> > >> decoded with ffmpeg software.  I have a short sample that I can
> > >> provide.
> > >>
> > >
> > > Yes I can forward the bug report and sample if you email them to me.
> > > Please test the sample with the latest Exoplayer and make sure it
> > > reproduces there so they can investigate easily.
> > >
> > >
> > >>
> > >> I have a channel that has this problem. The local NBC station changed
> > > hands at the beginning of 2017 and since then the stream gets periodic
> > > pixellation but only on NVidia. The pixellations are at exactly the same
> > > places on Shield as with VDPAU on my low-end, $20 NVidia cards. Apparently
> > > NVidia are using the same (faulty) software in the Shield as they have used
> > > for years in the low-end GEForce 210.
> > >
> > 
> > I hear back about my bug report. I forgot I had submitted a similar report
> > several months ago as well. Apparently it's a known issue in the hardware
> > and there's no software fix possible. Pretty disappointing. =(
> 
> Yes, that's definitely disappointing.  Can they say what conditions
> cause the problem?  I know the chances of anything changing are slim,
> but perhaps we could pass the information on to our local TV stations.
> I know I've seen the problem come and go in the past so it's something
> they can control in their encoders.

Aman,

Have you had the chance to follow up on this?  I'd really like to
report it to my local station.

David
-- 
David Engel
david at istwok.net


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