[mythtv-users] mythfrontend is shearing video playback

[John and Holly Klug]

Steve Smith wrote:
> John,
>
> Your description of the symptoms is exactly what you get if you NEED
> TO TURN DEINTERLACING ON!
>
>   
Eureka:
http://www.mythtv.org/wiki/index.php/Deinterlacing

It starts with a misleading statement that this applies to people with 
modern non-interlaced displays like LCD or plasma.

I tried SSE first, since it sounded the best bang with low work, and 
1080i recordings no longer show any shearing at 1080i.  I may try Bob 
later, but I would like to move on to 720p next.

Deinterlacing seem to have no affect on 720P recordings, and bright 
flashes of light, change of scenery, panning, or zooming result in 
visible lines on the screen at both 1080i and 720p X mode settings.

I notice the same line problem in an old fashioned encrypted commercial 
DVD recording, presumably at 480p?.  At least that is what my set says 
when I play it from my standalone DVD player.  I can back up, play it 
again, and see the same problem over and over again.  Needless to say, 
these problems don't occur when played from my standalone DVD player or 
from the RGB output of the same system to a normal monitor.  If I try to 
deinterlace a DVD movie with VLC, the movie is closed.

Just for kicks I tried all four of these EDID values to no avail:

(II) NVIDIA(0): "1920x1080_60i"      : 1920 x 1080 @  60.1 Hz Interlace  
(from: EDID)
(II) NVIDIA(0): "1920x1080_60i_0"    : 1920 x 1080 @ 59.94/60 Hz 
(CEA-861B Format 5) (from: EDID)
(II) NVIDIA(0): "1280x720_60"        : 1280 x  720 @  60.0 Hz  (from: EDID)
(II) NVIDIA(0): "1280x720_60_0"      : 1280 x  720 @ 59.94/60 Hz 
(CEA-861B Format 4) (from: EDID)