Re: Conversion of 608/708 captions to WebVTT - how to map the colour green

On Tue, Feb 24, 2015 at 9:36 PM, Philip Jägenstedt <philipj@opera.com>
wrote:

> On Sat, Feb 21, 2015 at 7:10 AM, Michael Borthwick
> <mb@michaelborthwick.com.au> wrote:
> > On 08/04/2014, at 1:08 PM, Silvia Pfeiffer wrote:
> >
> >> Note: I've made the change to "lime" and updated the related text, see
> >> https://dvcs.w3.org/hg/text-tracks/rev/07a843b7f31d
> >>
> >> Please let me know if there are more changes necessary.
> >>
> >> Regards,
> >> Silvia.
> >
> >
> > Dear list members,
> >
> > For those who are interested I have made the 22 minute video of my SMPTE
> > Australia 2013 talk regarding this issue available online with
> appropriate
> > amendments to reflect the changes kindly made by Silvia last year to the
> > mapping of green into CSS lime.
> >
> >
> http://michaelborthwick.com.au/closed_captioning_online_streaming_video_dfxp_webvtt.html
>
> Thanks Michael, this was a great talk! I'm not sure why, but I found
> the trouble with green and conflicting standards very amusing, a very
> familiar kind of problem.
>
> Since WebVTT doesn't have any dedicated syntax for colors it really
> comes down to the CSS that goes along with the captions, and of course
> any mapping specs. Unfortunately, I suspect you will not be the last
> to spend time looking for a suitable green color.
>

Haven't had a chance to watch yet, but from TTML:

<named-color>
  : ...
  | "green"                                 // #008000ff
  | "lime"                                  // #00ff00ff
  | "olive"                                 // #808000ff



>
> Did you ever hear back from the BBC about which the ultimate colors
> are? I doubt that #00FF00 is actually used on the Web, it's so bright!
>

Y = 0.299R + 0.587G + 0.114B


>
> Somewhat on topic, if you're making new captions, you might consider
> using WebVTT's voice tag, with which you can annotate the speaker and
> then style the speaker more explicitly. This is the second example in
> http://dev.w3.org/html5/webvtt/#other-features
>
> Philip
>
>

Received on Wednesday, 25 February 2015 05:17:08 UTC