[mythtv-users] overlay offset (blue line) and xv with mplayer and xine

[James L. Paul]

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On Tuesday 24 February 2004 4:49 am, Kevin G. Currie wrote:
> Ha, I just got done posting a fix for this one message ago.  Here's a
> more elaborate response since there seems to be more than one person
> having the problem.  Get xvattr, and try different settings for the
> XV_AUTOPAINT_COLORKEY XV_COLORKEY attributes.  I typically use a wrapper
> script to start mplayer (or zsnes, or mame, etc) under mythtv with all
> of the options that I want plus any additional commands that need to be
> run (such as xvattr).

That's exactly it. Adjusting the XV_COLORKEY value by 2 did the trick. Many 
thanks!

> Kevin
>
> On Tue, 2004-02-24 at 00:17, James L. Paul wrote:
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> > Aloha, I've been trying to resolve this minor annoyance for some time and
> > wonder if anybody has any tips...
> >
> > I'm using a GeForceII GTS with the binary nVidia drivers, versions 4363,
> > 4496 and 5336 all display a problem with vertical overlay offset
> > outputting to svideo when using xv. The problem does not occur when using
> > sdl.
> >
> > In a nutshell, when playing a 16:9 aspect movie (my TV is 4:3) in
> > fullscreen mode with either mplayer or xine, at the top of the image
> > overlay area there is a 1 or 2 pixel blue line. (It's always the same
> > height, it's just hard to tell it it's 1 or 2 pixels high.) This line
> > runs horizontally the width of the screen. If I turn off overscan I can
> > see a vertical line the same width running the height of the overlay area
> > at the left side. It appears to obviously be a slight offset error in the
> > overlay area, that's my guess. I don't normally see the vertical line,
> > since it's hidden by overscan. The horizontal line is very obvious and
> > distracting though, since it's not hidden by overscan when watching 16:9
> > videos. (It's hidden by overscan on both the top and left sides when
> > playing 4:3 videos.)
> >
> > If I force xine or mplayer to use sdl the overlay offset error isn't
> > there, and the display looks just right. The issue is that my Athlon
> > 1.4GHz takes as much as 20% higher hit to the CPU when using sdl than
> > with xv. I have enough CPU to comfortably handle my two tuners and watch
> > a video when using xv, but it's not quite enough when using sdl if both
> > tuners are recording. I'd obviously prefer to use xv. ;)
> >
> > I've tried 3 versions of the nVidia driver, they all otherwise work fine
> > and I haven't noticed any difference between them. Overscan works for me
> > with each version.
> >
> > I didn't see any overlay positioning options in nvtv to let me apply a
> > correction offset. I'm not sure which code is to blame, I can't blame the
> > player app, since they all work with sdl, it's hard to blame the nVidia
> > driver for the same reason. I'm left with the impression that I need to
> > address this with xv.
> >
> > Where should I look for an option to adjust this? Is there an xv setting
> > to allow me to correct this?
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