ISSUE-440: Add support for ittp:aspecRatio

Add support for ittp:aspecRatio

TTML WebVTT mapping note
Raised by:
Pierre-Anthony Lemieux
Opened on:
The addition of ittp:aspectRatio [1] to IMSC1 was specifically requested to support display of the same caption over multiple aspect ratio versions of the same content.

Can't this be supported in WebVTT?


Related Actions Items:
No related actions
Related emails:
  1. {minutes} TTWG Meeting 2015-10-29 (from on 2015-10-29)
  2. {agenda} TTWG Meeting 2015-09-24 (from on 2015-09-23)
  3. ISSUE-440: Add support for ittp:aspecRatio [TTML WebVTT mapping note] (from on 2015-09-23)

Related notes:

The mapping take only the existing TTML 1 and the WebVTT snapshot as a base. I do not know any way to specify this information in WebVTT.

If the TTWG finds room for improvement in WebVTT because of the mapping activity the best way to raise it would be on the Text Track list.

Andreas Tai, 27 Oct 2015, 21:56:34

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David Singer <>, Nigel Megitt <>, Chairs, Thierry Michel <>, Philippe Le H├ęgaret <>, Atsushi Shimono <>, Staff Contacts
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