Re: webtv-ACTION-261: draft a proposal for the IG to confirm a desire for HTML and CSS to support TTML playback

DASH-IF is also including TTML and IMSC as part of their guidelines http://dashif.org/guidelines/ <http://dashif.org/guidelines/>

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Priv.-Doz. DI Dr. Christian Timmerer
Assoc.-Prof | Multimedia Communication, Alpen-Adria-Universität Klagenfurt | blog.timmerer.com | dash.itec.aau.at
CIO | Head of Research and Standardization, Bitmovin Inc. | www.bitmovin.com
Geschäftsführer Förderverein Technische Fakultät | ftf.or.at
Lecturer | Carinthia University of Applied Sciences | www.fh-kaernten.at

> On 09.11.2017, at 05:20, Pierre-Anthony Lemieux <pal@sandflow.com> wrote:
> 
> Hi Nigel et al.,
> 
> Great. My input below.
> 
>> 1. The Media and Entertainment Interest Group recognises that playback of TTML subtitles and captions needs to be supported by the web platform as a whole.
> 
> I would list the formats and ecosystems that the IG has identified as
> having adopted profiles of TTML in general, and IMSC in particular.
> 
> I would also emphasize the web platform being a key authoring and
> playback for these formats and ecosystems.
> 
> Formats and ecosystem I can think of include:
> 
> HbbTV
> MPEG CMAF
> SMPTE IMF
> SMPTE-TT
> EBU-TT-D
> ARIB
> CTA WAVE
> DVB
> 
> Best,
> 
> -- Pierre
> 
> On Wed, Nov 8, 2017 at 6:54 PM, Nigel Megitt <nigel.megitt@bbc.co.uk> wrote:
>> All,
>> 
>> my proposed resolutions following Monday's meeting (designed to follow on from each other, i.e. we could accept all of them as resolutions):
>> 
>> 1. The Media and Entertainment Interest Group recognises that playback of TTML subtitles and captions needs to be supported by the web platform as a whole.
>> 
>> 2. The playback of TTML subtitles and captions on the web platform requires a CSS mapping for all the presentation features for which support is needed in the IMSC profiles of TTML, i.e. that for any given style attribute value permitted in IMSC there is an equivalent set of CSS property values that can be applied to equivalent HTML elements to achieve the same semantics.
>> 
>> 3. The playback of TTML subtitles and captions on the web platform is best supported by allowing Text Track Cues to be created that support the generic presentation semantics of HTML and CSS.
>> 
>> 4. The playback of TTML subtitles and captions on the web platform should include the ability to create appropriate Text Track Cues from data provided via Media Source Extensions.
>> 
>> Reading that back, it looks a bit like a manifesto. Anyway, comments or editing suggestions welcome, or indeed indications of support for making these proposals into resolutions.
>> 
>> kind regards,
>> 
>> Nigel
>> 
>> ________________________________________
>> From: Media and Entertainment Interest Group Issue Tracker [sysbot+tracker@w3.org]
>> Sent: 09 November 2017 02:37
>> To: public-web-and-tv@w3.org
>> Subject: webtv-ACTION-261: draft a proposal for the IG to confirm a desire for HTML and CSS to support TTML playback
>> 
>> webtv-ACTION-261: draft a proposal for the IG to confirm a desire for HTML and CSS to support TTML playback
>> 
>> http://www.w3.org/2011/webtv/track/actions/261
>> 
>> Assigned to: Nigel Megitt
>> 
>> 
>> On product: tt
>> 
>> draft a proposal for the IG to confirm a desire for HTML and CSS to support TTML playback
>> 
>> 
>> 
>> 
>> 
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