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List:       linux-video
Subject:    Re: [video4linux] Alex: channels
From:       Alan Cox <alan () cymru ! net>
Date:       1998-07-28 10:34:09
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> What about ordinary read() calls? This is the basic functionality. IMHO,
> anything that claims to be a video capture card should support this. The
> other modes are just icing (important for some applications, but not the
> *basic* functionality).

There are devices that can analog overlay but not capture. Othwerwise yes

> I haven't spec'ed pan-tilt-zoom in, but I hope it's at least be possible
> without violating the spec. Something for us to think about.

Adding the subfield you want to capture covers that

> My gut feeling is that channels like you describe isn't going to be
> practical. Video is one channel. VBI could be another channel, in fact
> multiple channels for different VBI lines. But find out what VBI drivers
> exist already.

Right now VBI is specced as 'how it comes off the the bt848' ;)
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