[mythtv] 2019-render: nvdec decoding artefacts in the editor

[John Pilkington]

On 05/11/2019 12:42, John Pilkington wrote:
> Hi Mark:  I see a new commit that might have fixed this - but I had 
> started, so I'll finish...

Now on 99cff15, and I'm still seeing the same blockiness on steps 
between adjacent keyframes.
> 
> This is a niche effect but it's still there (0515eacc), even with 
> progressive frames.  ffmpeg works fine.  Both work well in normal 
> playback but then ffmpeg demands more of the cpus.

That should have been 'makes the cpus work harder.'
> 
> Would it be feasible to switch to ffmpeg when displaying a static frame?
> 
> Thanks,
> 
> John P
> 
> 
>