Re: [Deinterlace-discuss] TTX flickers, VBI capture can't be turned off

[Atsushi N. <at...@ch...>]

David Balazic <dav...@un...> wrote:
> When viewing teletext, it sometimes flickers.
> It is like if the white letters turn black
> for a split second and then come back to white.
> This happens pretty often, let's say once or twice per minute.
> When it happens, 10%-50% of the displayed letters do it,
> not all at the same time but with a very small delay.

All teletext drawing should be offscreen buffered now but I don't
remember if I did that before or after 4.1.5.  Do you still get the
problem if you have WSS-Data turned off?


> In the Datacastng menu I have checked :
> - Capture VBI-Data
> - VideoText ( shouldn't this be TeleText ? )

I'm not sure about this.  I've come to refer to the screen drawn elements
as "Teletext" and the VBI signal subset as "VideoText" but I could be
wrong.  All the internal VideoText/Teletext stuff are pretexted with
"VT" also (instead of "TT").  The only inconsistency I see is the
VideoText capture variable having the API name "DOTELETEXT".

> 
> The following entries in that menu are disabled ( ghosted/gray ) :
> - Capture VBI-Data
> - WSS-Data
> 
> So , I can't disable VBI capture any more. Why is that ?

This is very strange..  An instance I see in the code that would disable
the VBI-Capture menu (IDM_VBI) is this line:

EnableMenuItem(hMenu, IDM_VBI, LockWSS ? MF_GRAYED : MF_ENABLED);

LockWSS:

int i = Setting_GetValue(Aspect_GetSetting(AUTODETECTASPECT));
BOOL LockWSS = (i == 2) ||
    ((i == 1) && Setting_GetValue(Aspect_GetSetting(USEWSS)));

Maybe it'll be fixed if you change AUTODETECTASPECT setting or disable
the WSS information screen (Advanced_Settings->OSD_Settings->Use_WSS). 
Laurent might know more about this.

Regards,


-- 
Atsushi Nakagawa
<at...@ch...>
Changes are made when there is inconvenience.