bttv 2.6.16: wrong VBI_OFFSET?
- From: Trent Piepho <xyzzy (at) speakeasy.org>
- Date: Mon, 8 May 2006 18:35:18 -0700 (PDT)
On Mon, 8 May 2006, Daniel [iso-8859-1] Glöckner wrote:
> On Mon, May 08, 2006 at 10:33:01AM -0700, Trent Piepho wrote:
> > Is there anyone with a bt878 and NTSC that can test for the correct NTSC
> > value?
>
> I simply used my DVD player as input.
> It's the same value for NTSC and PAL. 250-252 for HSCALE=0.
I thought the value used for PAL was 244?
Do you have a card with an NTSC clock crystal?
I managed to get my old bt848 based card out of the computer it was in and get
it working again. I've found the VBI delay is about 240-244, both by
measuring the caption start, and using your idea of looking for the end of
line hsync pulse.
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