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

Mark Kendall mark.kendall at gmail.com
Tue Nov 5 17:35:49 UTC 2019

On Tue, 5 Nov 2019 at 12:42, John Pilkington <johnpilk222 at gmail.com> wrote:
> Hi Mark:  I see a new commit that might have fixed this - but I had
> started, so I'll finish...
> 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.
> Would it be feasible to switch to ffmpeg when displaying a static frame?


Unfortunately I don't think that will work (without a lot of effort).

However, I've just taken a look at more recent FFmpeg fixes for
cuvid/nvdec and the following commit looks like it might fix the


I'll test it when I've kicked my nvidia box around a bit. For some
reason it can't find the opengl libs...

Peter has also just offered to resync to latest FFmpeg - so hopefully
we'll pick up sundry fixes like this.


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