[mythtv] NVidia Pixellation

David Engel david at istwok.net
Tue Jul 31 01:48:58 UTC 2018

On Tue, Jul 31, 2018 at 01:35:09AM +0000, Gary Buhrmaster wrote:
> On Mon, Jul 30, 2018 at 10:56 PM David Engel <david at istwok.net> wrote:
> ...
> > Interestingly, when I first encountered this problem (probably 8 or
> > more years ago) older Nvidia cards didn't exhibit the problem.
> This is not entirely surprising.

I know.  I also know this has all been discussed here before at least
once and probably more over the years.


> Different VPU firmware in the various generations
> of NVidia hardware operate differently.  Depending
> on the details the decode was done in the dedicated
> "PureVideo" hardware, or partially offloaded into
> the general purpose CUDA implementations on the
> GPU, and some parts on the CPU itself.  The VPU
> hardware has undergone not only enhancements
> (additional codec support, different levels and/or
> profiles), but reportedly (by those with much better
> testing capabilities than I possess) more subtle bug
> fixes (for good/bad/ugly reasons, NVidia does not
> document the bugs in older hardware variants).
> Last I checked, PureVideo was up to feature set I
> (although I don't know of anyone using a Titan V
> GPU (at $3000) in their HTPC).
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David Engel
david at istwok.net

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