ISSUE-227: <p> fade-up and –down

<p> fade-up/down

<p> fade-up and –down

Raised by:
Pierre-Anthony Lemieux
Opened on:
[The following is extracted from the liaison received from SMPTE at]

See Sections 6.1.4 and 6.1.5 at ST 428-7, and Section 8.2.13 at TTML.

It shall be possible to apply the tts:opacity style parameter to an individual <p> element. The parameter shall be animatable.

In order to avoid markup duplication when tts:opacity is used to create fade-up and -down effects, it shall be possible to either (a) define a given sequence of <set tts:opacity="…"> elements once and apply it to multiple <p> elements, or (b) allow that linear interpolation be applied between <set> values.
Related Actions Items:
No related actions
Related emails:
  1. {agenda} TTWG Meeting 17/7/2014 (from on 2014-07-16)
  2. out-of-line-animation (from on 2014-07-11)
  3. TTML Minutes for 15/11/13 (from on 2013-11-21)
  4. ISSUE-298 (reference-animate): Permit reuse of animation constructs by allowing multiple content elements to reference same out-of-line animation declaration [TTML2] (from on 2013-11-15)
  5. No Meeting today 12-09-13 (from on 2013-09-12)
  6. Minutes for 05/09/13 (from on 2013-09-05)
  7. Agenda for 05/09/13 (from on 2013-09-04)
  8. RE: TTML Agenda for 29/08/13 (from on 2013-08-28)
  9. TTML Agenda for 29/08/13 (from on 2013-08-28)
  10. ISSUE-227 (<p> fade-up/down): <p> fade-up and –down [] (from on 2013-05-30)

Related notes:

It is not clear from this proposal whether this is intended to operate like the proposed addition of extent/origin on <p/>, i.e., applying opacity to the generated anonymous region, or whether this is intended to apply to individual <p/>s selected into a region irrespective of the opacity assigned to the region. If the latter is the case, then I would expect opacity to also apply to body, div, and spans.

Glenn Adams, 30 May 2013, 19:48:01

Add support for continuous animation using animate element, which handles fade in/out.

Need to also change opacity to apply to content elements, so leaving open.

Glenn Adams, 27 Aug 2013, 01:16:02

Add application of opacity to content elements.

Glenn Adams, 27 Aug 2013, 01:32:17

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