On Mar 10, 2006, at 12:41 PM, Andrew Barr wrote:

> On Friday 10 March 2006 11:39, bregadjul doank wrote:
>> Thanks Keith for your response. I think there is no
>> problem with the source since when I use it under
>> Windows Media Center or using the original
>> application, there are no spaces. I also used Winfast
>> tuner before and there were no spaces too. On some
>> channels, there is also alternating black and white
>> space at the top. So I think the problem might be the
>> ivtv or the debian. Any further suggestions? Thanks in
>> advance.
>
> Whatever application you are using to capture your video, you need to
> configure to do an overscan. It sounds like the Windows  
> applications you are
> talking about already do this for you.
>
> The "alternating black and white space" is the VBI (vertical blanking
> interval), containing captions and other program data. Depending on  
> the
> source material it could also contain analog copy protection (DVDs,  
> satellite
> and cable premium/pay-per-view). This will also go away if you  
> configure
> overscan.
>
> Does anyone know if overscan is the responsibility of the playback  
> program or
> does ivtvctl have an option for this? I know MythTV has an overscan  
> option...
>

I'm pretty sure its always going to be a playback option.  The PVR is  
going to grab the whole signal.

While its nice that Windows MCE does this for you, I like being able  
to configure it myself.  In the end, I only overscan about 1%,  
instead of the standard 4%.  I don't see much extra stuff, and I get  
more content.

Keith C

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