[vdr] Digital encoding in first(top) video row

Reinhard Nissl rnissl at gmx.de
Mon Jun 1 00:29:11 CEST 2009


Alex Betis schrieb:

> I have few DVB-S channels with first (top) row of the video shown on the
> screen as a set of
> black and while pixels that definitely represent a digital information.
> I clearly see some
> counters running there.
> The same channel broadcasting by local cable provider don't have that
> line shown.
> Do you think they intentionally hide that row? Or there is a problem
> with MPEG decoding for
> those channels in VDR?

The broadcaster chose to encode this line which was part of the
original video. So after correct decoding the line appears in the

> Is there any way to auto detect and hide that row?

Typically, this line is in the overscan area of the image. Simply
zoom the video a bit and it will fall outside of the visible area.

In case you can receive this channel:


you'll see marks indicating overscan areas at 1 %, 2 %, 3 %, 4 %
and 5 % of the image.

Dipl.-Inform. (FH) Reinhard Nissl
mailto:rnissl at gmx.de

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