[mythtv-users] Flickering lines at the bottom of TV
myth at dermanouelian.com
Tue Jul 22 00:32:37 UTC 2008
On Jul 21, 2008, at 5:24 PM, Brian Phillips wrote:
> I have a problem where my recordings on one of my channels of analog
> have a flickering line at the bottom (and sometimes top) of the
> It's mainly the bottom. I've got a screenshot here:
> I don't know how to describe what it is, but I was hoping someone on
> list could tell me what causes it and what I can do to fix it.
> It only happens on one of my 20 or so cable channels I get. I was
> it might be a tuning issue (maybe fine tuning the frequency for that
> could fix it) or something in that same vein. Anyone know what
> causes that
> flickering line? It's not always there. It's just always there on
It's being broadcast that way. There is nothing to fix on your end.
Usually a television's overscan will hide this sort of thing but since
you're displaying the entire video, you're getting the garbage* edges
For info on Overscan here: http://www.mythtv.org/wiki/index.php/Overscan
To hide this, you can play back your videos 1% or 2% larger than they
actually are (whichever works for you) or you can crop your recordings
by transcoding them with crop settings.
*The "garbage" is actually encoded information being sent along with
the broadcast like metadata information about the program, closed
captioning text, etc.
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