[mythtv-users] what is this video artifact?

[Jim Stichnoth]

On Sat, Apr 18, 2015 at 11:36 AM, James Miller <gajs-f0el at dea.spamcon.org>
wrote:

> I note a video artifact under certain conditions when watching any HD
> recording. The artifact is either absent or too difficult to notice when
> viewing SD recordings. Further, the artifact is only noticeable in HD
> recordings in certain instances: I note it when, for example, the camera is
> panning up or down or side-to-side, or when the frame includes a lot of
> movement toward the top of the screen. The artifact can be described as a
> series of horizontal lines that seem to get out of sequence about one
> quarter of the distance from the top of the screen. Once the panning or
> movement stops, the horizontal lines are gone and the display returns to
> normal--the artifact only showing up again once this panning or movement
> begins again. All in all the artifact shows up only very briefly and
> sporadically.
>
> So, what is the artifact? I'm not much of a video connoisseur, so it just
> constitutes a minor annoyance for me: I can live with it. But if there is
> some simple way of fixing it, I might give that a try.
>
> This sounds like it might be tearing.
http://en.wikipedia.org/wiki/Screen_tearing (though their example looks
much cleaner than the tearing I've seen)

Depending on your setup, there are a number of things you might do to fix
it.

Jim
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