[mythtv-users] Green Line

[Jim Stichnoth]

On Tue, Dec 24, 2013 at 7:03 AM, Rich West <Rich.West at wesmo.com> wrote:

> In my conversion of my ISO files to m4v, I've started noticing a 1 pixel
> wide green line along the bottom of the screen when playing back in
> MythTV.  I searched through the archives and found a few references to
> this, but I didn't stumble across a solution.  One poster suggested
> increasing the vertical overscan, but since the videos that I do see it
> on have a small (partial) black bar at the top and bottom, this idea
> doesn't work.
>
> The videos do play properly in VLC, and I'm not seeing this with ALL of
> the converted isos...
>
> I'm running (packages from RPMFusion):
> MythTV Version : v0.27-109-gcb744f8
> MythTV Branch : fixes/0.27
> Network Protocol : 77
> Library API : 0.27.20131107-1
> QT Version : 4.8.5
>
> I'm wondering if it might be something I'm doing with regard to the
> encoding (handbrake) to cause the issue vs an issue within
> mythfrontend's player..
>

This is usually due to a 1080-line video being encoded as 1088 lines (which
is a multiple of 16), and then the player trying to display the last
invalid 8 lines.  I forget the details, but the video file has some
cropping information to let the player deal with it.  It's possible that
your encoder is omitting the crop region, or supplying it in a format
MythTV doesn't recognize.

Some players unconditionally crop 1088 to 1080 because this is so common.

A small sample would be helpful here.

Jim
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