[mythtv-users] 16:9 video playback cutting off 10% on right side

[Robert Johnston]

> > >> > System specs:
> > >> >
> > >> > Myth 0.18
> > >> > Nvidia FX5200, 7667 drivers
> > >> > 2x HD-3000 capture card
> > >> > 800x600 through TV-out over s-video.
> > >> >
> > >> > I had my Myth system setup and everything was working great...until
> > >> the fan on the video card went bad and the system started locking
> > >> up.
> > >> >
> > >> > I was using a Nvidia 6200 AGP video card but I replaced it with a
> > >> fanless FX5200 card. After I replaced the video card and rebooted,
> > >> the Myth interface looked exactly the same as before, filling the
> > >> screen with very little overscan. I then attempted to playback some
> > >> recorded TV and discovered that on 16:9 material, at least 10-15% of
> > >> the picture is missing on the right side. 4:3 material seems to work
> > >> fine.
> > >> >
> > >> > This did not happen with the 6200 card. I didn't change any settings
> > >> in .nvidia-settings-rc or in XF86Config-4, so I don't know what's
> > >> causing this. Does anybody have any ideas?
> > >>
> > >> Different video cards sit the screen in slightly different places,
> > >> it's just a fact of life. You'll need to tinker with the modeline in
> > >> the XF86Config-4 file, just take it slowly.
> >
> > > I don't think that's the problem. The X desktop and the Myth UI both
> > > look correct. Neither of them is getting 10-15% of the picture chopped
> > > off on the right side. I only see the problem during 16:9 video
> > > playback. I have Myth configured to use the same video mode for the GUI
> > > and for playback, so it isn't that either.
> >
> > Are you definitely running your desktop in the same 16:9 mode?
> > Do you have any other modelines defined?
>
>  I really appreciate the help.
>
>  My desktop is definitely running at 800x600.  This is a 4:3 mode.  There
> are other modelines defined, but as I said before I didn't change anything
> in XF86Config-4 when I switched video cards.  I'll delete everything besides
> 800x600 to see if it makes a difference.   The Myth UI is running full
> screen.
>
>  Let me try to clarify the problem.
>
>  Desktop resolution is 4:3, displaying on my TV via s-video.
>  I'm recording OTA HD.
>
>  4:3 shows that were broadcast with 16:9 aspect ratio display with grey bars
> on the sides.  Changing Myth to 16:9 Zoom aspect ratio makes it use the full
> screen.  This is the behavior I expect.
>
>  16:9 shows that used to take the full width of the screen with black bars
> at the top and bottom now have 10-15% of the picture pushed off the right
> hand side of the screen.  Regardless of what aspect ratio I tell Myth to use
> for display, some of the picture is always lost.  16:9 stretch seems to be
> the closest to keeping all the picture.  With my old video card, I could
> leave the myth aspect ratio set to "default" and I wouldn't lose any
> picture.

Is this related to the "Stretched" preview in the Live TV Guide (When
the video is now square (480x480, for example), the right-hand side of
the image is chopped off and the video is displayed stretched).
--
Robert "Anaerin" Johnston