On Saturday 25 August 2007 22:32:39 Marty wrote:
> Hans Verkuil wrote:
> > Mail the output, perhaps that will tell me something. Because I
> > have no idea whatsoever what could be causing the problems you
> > have.
>
> I have a theory based on observation of the problem: Most channels
> don't contain black, but sports and news broadcast often have narrow
> strips extending across the image, containing text against a back
> background. I think this is being interpreted as horizontal blank
> period. As the strip appears or disappears, the problem follows it.
> In one case large black box in the center containing text, which
> caused vertical sync failure, suggesting that it was interpreted as a
> vertical blank period.
Do you get the same problem when running:
mplayer -demuxer rawvideo -rawvideo ntsc:format=hm12 /dev/video32
(Use the correct device for your card).
If that works fine, then try running this mplayer command together with
a 'cat /dev/video0 >test.mpg' (capturing the MPEG as well from the same
card). Then run 'mplayer test.mpg' later to see if that has problems.
Does switching the antenna cables between your working card and failing
card make a difference?
Regards,
Hans
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