[mythtv-users] line encoded at bottom of every frame

[Joseph A. Caputo]

Top-posting rearranged.

On Wednesday 29 October 2003 12:20, D Banerjee wrote:
> ----- Original Message -----
> From: "Kevin Chmilar" <kevin at chmilar.org>
> To: <mythtv-users at mythtv.org>
> Sent: Wednesday, October 29, 2003 11:41 AM
> Subject: [mythtv-users] line encoded at bottom of every frame
>
> > I recently got a DCT2500 set top box and connected it to the
> > S-Video input on my capture card.  But now I get a line that is 2
> > or 3 pixels thick appearing at the bottom of my screen.  It is also
> > encoded into the video stream, which really messes up the
> > commercial detection feature. The line is basically white but it is
> > not constant -- pixels change color.
> >
> > This problem does not appear when I use the direct analog cable
> > input to the tuner on the capture card.  It only happens when the
> > DCT is connected.  I have tried connecting to the DCT to the
> > S-Video, composite and tuner (using channel 3) inputs and the
> > problem appears on each input.  I have tried 2 different capture
> > cards, a bt8x8 based card and a pvr-250.
> >
> > When I hook the DCT directly to my television, the picture is fine
> > -- no line at the bottom.  So where is the line coming from?  It
> > doesn't seem to be generated by the DCT, yet it appears in the
> > video stream encoded by the pvr-250.
> >
> > My capture resolution is set to 480x480 -- could that be the
> > problem?
> >
> > Any suggestions are greatly appreciated.
> >
> > cheers,
> > kevin
>
> That's common on analog video, it just needs to be cropped. I don't
> know if pvr-250 supports that, but you can just increase your
> overscan in mythtv playback options.
>
> Debabrata


Overscan may help the output as viewed on the TV, but it won't help the 
commercial detection.

-JAC