ISSUE-201: How to specify aspect ratio to understand positioning that may apply for display or video.
aspectRatio
How to specify aspect ratio to understand positioning that may apply for display or video.
- State:
- OPEN
- Product:
- TTML2
- Raised by:
- Glenn Adams
- Opened on:
- 2013-02-21
- Description:
- See TTWG Feb 14 Meeting minutes: http://www.w3.org/2013/02/14-tt-minutes.html,text.
How to specify aspect ratio to understand positioning that may apply for display or video. - Related Actions Items:
- No related actions
- Related emails:
- April F2F Meeting minutes (from nigel.megitt@bbc.co.uk on 2015-04-22)
- TTML Minutes for 15/11/13 (from nigel.megitt@bbc.co.uk on 2013-11-21)
- {minutes} TTML Meeting of 24/10/13 (from glenn@skynav.com on 2013-10-24)
- RE: TTML Agenda for 24/10/13 (from mdolan@newtbt.com on 2013-10-23)
- TTML Agenda for 24/10/13 (from nigel.megitt@bbc.co.uk on 2013-10-23)
- RE: TTWG Meeting Minutes March 7, 2013 (from momartin@microsoft.com on 2013-03-07)
- TTWG Meeting Minutes March 7, 2013 (from momartin@microsoft.com on 2013-03-07)
- [minutes] 2013-02-28 Timed Text (from plh@w3.org on 2013-03-07)
- RE: TTWG Meeting Minutes Feb 28, 2013 (from momartin@microsoft.com on 2013-03-07)
- TTWG Agenda March 7, 2013 (from momartin@microsoft.com on 2013-03-07)
- TTWG Meeting Minutes Feb 28, 2013 (from momartin@microsoft.com on 2013-03-07)
- Re: TTML Agenda for 28/2/13 (from glenn@skynav.com on 2013-02-28)
- RE: TTML Agenda for 28/2/13 (from mdolan@newtbt.com on 2013-02-28)
- TTML Agenda for 28/2/13 (from momartin@microsoft.com on 2013-02-28)
- TTWG Meeting Minutes Feb 28 (from momartin@microsoft.com on 2013-02-28)
- RE: ISSUE-201: How to specify aspect ratio to understand positioning that may apply for display or video. [TTML.next] (from momartin@microsoft.com on 2013-02-21)
- ISSUE-201: How to specify aspect ratio to understand positioning that may apply for display or video. [TTML.next] (from sysbot+tracker@w3.org on 2013-02-21)
Related notes:
See presentation from Netflix provided Feb 14: http://lists.w3.org/Archives/Public/public-tt/2013Feb/att-0041/TTML_AspectRatioProblem.pdf
Monica Martin, 21 Feb 2013, 14:52:33See threads Jan-Feb 2012, starting here: http://lists.w3.org/Archives/Public/public-tt/2013Jan/0027.html
Monica Martin, 21 Feb 2013, 14:53:33Proposed text:
If <code>ttp:aspectRatio</code> is "true", the root container SHALL be mapped to a rectangular area within the related video object such that:</p>
- the aspect ratio of the rectangular area is equal to <code>ttp:aspectRatio</code>
- the center of the rectangular area is colocated with the center of the related video object frame,
- the rectangular area is entirely contained within the related video object frame and
- the rectangular area has a height or width equal to that of the related video object frame.
Raised by David Ronca
Philippe Le Hégaret, 24 Oct 2013, 15:28:01Nigel: P1
Philippe Le Hégaret, 24 Oct 2013, 15:28:13Tweaked proposed text:
If <code>ttp:aspectRatio</code> is present, the root container SHALL be mapped to a rectangular area within the related video object such that:</p>
- the aspect ratio of the rectangular area is equal to <code>ttp:aspectRatio</code>
- the center of the rectangular area is colocated with the center of the related video object frame,
- the rectangular area is entirely contained within the related video object frame and
- the rectangular area has a height or width equal to that of the related video object frame.
[nigel]: Glenn to investigate SVG viewbox etc and see if something can be brought in from that space.
15 Nov 2013, 09:23:29Reassigning from pal to glenn.
Nigel Megitt, 15 Nov 2013, 09:24:04[nigel]: [TTWG meeting 2015-04-09] Agreed to remove ttp:storageAspectRatio, add a display aspect ratio parameter and deal with overconstrained inconsistent extent in pixels on root, DAR and PAR.
9 Apr 2015, 23:26:13Display change log
