Re: [Zapping-misc] decoding raw ntsc CC with em28xx

[Ed K. <ed...@ka...>]

Hi Padraig,

I too tried to use vbi data. in my case to extract the PDC signal.
What card are you using ? 
i am not sure my card haupage pvr350 has the same chips.

Kind regards,
Ed

On Fri, 2009-02-13 at 14:56 +0000, Pádraig Brady wrote:
> Pádraig Brady wrote:
> > I'm having serious trouble with this.
> > My tuner/driver on linux only provides raw VBI data.
> > 
> > I've modified contrib/ntsc-cc.c to set:
> >   strict=0;
> >   services=VBI_SLICED_CAPTION_525 | VBI_SLICED_VBI_525;
> > That's the combination I get furthest with.
> > I can see the raw pattern attached with this command:
> >   ./zvbi-ntsc-cc --cc -v -r11 -w
> > However nothing is decoded.
> 
> Turns out this was because the em28xx driver was setting
> the wrong vbi.start number. Hence VBI data was noticed
> on the 12th row, but the line was reported as 17 rather than 21.
> I've fixed the driver and now the decoding is done correctly.
> 
> cheers,
> Pádraig.
> 
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