[mythtv-users] Line of garbage at top of screen

[Jarod Wilson]

On Tuesday 31 January 2006 10:23, Brad Fuller wrote:
> Brandon Stoll wrote:
> >> Are there any other solutions to this?  I use both HD and analog tv and
> >> only the analog has the garbage.  If I use settings in the TV playback
> >> screens it effects both analog and HD and so I must compromise garbage
> >> at the bottom of my HD channels for clean analog channels and
> >> vice-versa.  Also, other video players that I've used (like tvtime)
> >> automatically take care of this garbage, why can't myth?
> >
> > Can you take a screencap of it? Or does it look anything similar to
> > the bars at the top on http://www.mrmagoo.org/temp/HDTV-2.jpg and
> > http://www.mrmagoo.org/temp/HDTV-3.jpg ? On QAM channels I see these
> > lines on any 4:3 programming and they are rather annoying, and I now
> > notice them on analog channels too.  I thought it was something the
> > cable company did so their STB can switch for 16:9 and stretched 4:3,
> > but my previous post to this list got no responses.  I havn't seen
> > this with my TV's built-in tuner, so I assume it is something MythTV
> > is suppost to handle that it doesn't.
> >
> > I see the overscan settings could fix this, but without being able to
> > set program-specific overscans it would be cutting off some of
> > "normal" broadcasts.  I guess a small price to pay for sanity but
> > still.
>
> that's just VBI data. It's in every broadcast. You don't see it on your
> regular TV with it's tuner because the mfr sets the overscan so high
> that it's not seen. You can too. It's easy to do with the overscan
> setting in mythtv frontend>>Utilities/Setup>>Setup>>TV
> Settings>>Playback>>Overscan
>
> Set the Vertical over/underscan setting to something small like 2 or 4
> and check your video playback. I play both NTSC and ATSC 6:9 and it
> works fine.

Or just use the custom filter "crop". I forget the exact parameters, but you 
basically specify how many pixels to chop off the top, bottom and sides. 
Details can be found in the list archives, I'm sure.

-- 
Jarod Wilson
jarod at wilsonet.com
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