Re: Scrolling as overlap avoidance (Re: Alternative approach to scrolling, with demos)

The captions-follow-speaker use case is more complex than just simple
left-right alignment. One example that occurs fairly frequently is having a
group of multiple speakers all on-screen and they all respond to one
particular question or statement with one or two words. Digging up actual
video is harder, because one of the examples I remember most clearly I
rented, but do not own.

For this kind of use case, when we take possible font scaling into account,
a horizontal center anchor , and a top vertical anchor almost always makes
the most sense - i.e. when you scale the entire caption, you want it still
to be centered below the speaker, and you want it to extend below the top
margin, so that it does not obscure anything in the speaker itself.

If I've been following you correctly, for the pop-on use case that is
already handled for the cue box, and can be done irrespective of what
happens with regions. Your question is only about regions themselves?

Christian

Sent from my mobile phone.  Please excuse any touchscreen-induced weirdness.
On May 8, 2014 9:19 AM, "Philip Jägenstedt" <philipj@opera.com> wrote:

> [I accidentally sent this reply off-list two days ago.]
>
> In the CPC demo, simple left and right alignment is used to follow the
> speaker:
> http://www.youtube.com/watch?v=BbqPe-IceP4
>
> Do you have an example where something more fancy than this is used?
> Note that just by using the position, size and align setting you can
> do fancier things, but an example would help determine if that's
> enough or not.
>
> On Mon, May 5, 2014 at 6:31 PM, Christian Vogler
> <christian.vogler@gallaudet.edu> wrote:
> > To me, positioning for speaker identification makes the most sense in
> terms
> > of the anchor point - this point is the target for each speaker.
> >
> > Christian
> >
> >
> > On Mon, May 5, 2014 at 12:27 PM, David Singer <singer@apple.com> wrote:
> >>
> >>
> >> On May 5, 2014, at 5:00 , Philip Jägenstedt <philipj@opera.com> wrote:
> >>
> >> >> (2) the background color on the width and height of the rollup area
> >> >> needs to be changeable
> >> >
> >> > Why? As I noted in the "background box tweaking" thread that's still
> >> > possible with the sum of my suggestions, but I don't understand what
> >> > the use case is.
> >>
> >> >> (4) move all the cues in the region as a group to another location
> >> >
> >> > This is also not handled by the current spec. I don't think it makes
> >> > sense either, why not just end the cues and repeat them in a new
> >> > position?
> >> >
> >>
> >> I agree for these that if you want something ‘similar’ to appear as
> what’s
> >> already there, the clean thing to do is to re-draw it.  Same content
> but in
> >> a different region (with different position or colors), and so on.
> >>
> >> >
> >> >> (3) font size changes on the region need to make the region go bigger
> >> >> centered out from the anchor point
> >> >
> >> > That's not handled by the current spec. We've talked about using
> >> > font-relative units but that hasn't happened. I'd love to understand
> >> > the use case for this though. Do you have an example video frame where
> >> > scaling around an anchor point is necessary as opposed to mode of
> >> > scaling that happens with classical WebVTT?
> >> >
> >> >
> >>
> >> I also am curious
> >>
> >> David Singer
> >> Manager, Software Standards, Apple Inc.
> >>
> >>
> >
> >
> >
> > --
> > Christian Vogler, PhD
> > Director, Technology Access Program
> > Department of Communication Studies
> > SLCC 1116
> > Gallaudet University
> > http://tap.gallaudet.edu/
> > VP: 202-250-2795
>
>