[mythtv-users] Adjusting the recording frame on a PVR500?

David Watkins watkinshome at gmail.com
Mon Nov 19 13:37:34 UTC 2007

On 19/11/2007, Marc Sherman <msherman at projectile.ca> wrote:
> All recordings made by my PVR500 are slightly mis-framed; there's a
> small black bar along the bottom, maybe about 10 pixels. I suspect that
> I'm missing the same amount of data from the top, as well. Is there any
> way to adjust the framing of recordings, either in the mythtv setup or
> with ivtv driver parameters?
> The worst part is, for the past month and a half (since I first got Myth
> running), it hasn't bugged me -- every once in a while I'd notice it,
> and say to myself, "nah, it's just an optical illusion, because the
> border of the lcd is black and bevelled." Last night I actually walked
> up to the screen and looked at it closely, confirming that it's indeed
> part of the image. For the rest of the night, it bothered me immensely,
> and now I think I may have gone and ruined the mythtv experience for
> myself. :)

TV broadcasts are designed to be overscanned on playback, which means
setting the picture size bigger than the display area, so the edges
get cropped off.  This gets rid of annoying effects round the edges
such as you are seeing.

Maybe your display output is not overscanning for some reason.  One
reason might be using a computer monitor as a screen as opposed to a
TV (TVs tend to overscan by default).

If you're using nvidia drivers then the nvidia-settings program can be
used to adjust overscan.

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