[linux-dvb] Display artifacts with VisionPlus (Twinhan) DVB-T card

Manu Abraham manu at kromtek.com
Sat Mar 12 09:27:04 CET 2005

Matthew Phillips wrote:
> Hello all, I'm having some problems with some Australian DVB-T channels, 
> which I'm hoping someone here might have a clue about. The SD pictures 
> I'm getting on some channels have, either at the top or bottom of the 
> picture, a line of blank pixels which sometimes have some white streaks.
> I've attached an example, the rogue pixels are at the top left 
> (hopefully attachments are handled on this list). Sometimes this blank 
> line has a steady set of white pixels as in the example, which flicker 
> irritatingly :/ Sometimes the pixels spontaneously go away only to pop 
> back up again later.
> This happens on channel 9 and 10 here in Adelaide, but not for 2, 7 or 
> SBS. I'm seeing this both in MythTV and from dvb_stream pumped into 
> mplayer, so I'm fairly sure it's the DVB backend that's the problem. 
> I've tried fiddling with all the various tuning params, to no avail.
> Anyone got any ideas what else I could try to isolate the problem?

The driver does not handle any image processing.. It is done by mplayer 
in your case.. maybe Nico can comment better on the video artefact in 
the picture. or maybe the Mplayer list also, but please do post back 
whatever solution you have done to achieve this on Mplayer on this list.


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