ISSUE-287: Generic ability to tunnel BASE64 encoded binary files for legacy support

Binary Tunnelling

Generic ability to tunnel BASE64 encoded binary files for legacy support

State:
CLOSED
Product:
TTML2
Raised by:
Nigel Megitt
Opened on:
2013-10-23
Description:
The EBU has sent a liaison which requests Binary tunnelling, to match the functionality supported in EBU-TT Part 1 [1] via the ebuttm:binaryData element.

[1] http://tech.ebu.ch/docs/tech/tech3350.pdf section 3.1.1.2

The ability to tunnel BASE64 encoded binary files within a TTML document for the purpose of maintaining compatibility with legacy infrastructures, for example EBU Tech 3264 (“STL”) files.

This functionality is broadly similar to the background image tunnelling mechanism in SMPTE-TT however it is intended to carry a different payload.

It is also desired that the binary data be carried not only within metadata in the <head>, which has the effect of requiring any parser to skip to the end of it before being able to start processing the <body>, but also at the end of the document. Some way to implement a "end of the document" section would be useful for this purpose - a <tail> element?

Note that there are also associated metadata elements in EBU-TT Part 1 for carrying the equivalent metadata fields from STL documents.
Related Actions Items:
No related actions
Related emails:
  1. Re: {agenda} TTWG Meeting 2014-12-11 (from nigel.megitt@bbc.co.uk on 2014-12-11)
  2. {agenda} TTWG Meeting 2014-12-11 (from nigel.megitt@bbc.co.uk on 2014-12-10)
  3. {minutes} TTWG Meeting 27/11/2014 (from nigel.megitt@bbc.co.uk on 2014-11-27)
  4. Re: {minutes} TTWG Meeting 13/2/2014 (from tmichel@w3.org on 2014-02-13)
  5. {minutes} TTWG Meeting 13/2/2014 (from nigel.megitt@bbc.co.uk on 2014-02-13)
  6. {minutes} TTML Meeting of 24/10/13 (from glenn@skynav.com on 2013-10-24)
  7. RE: TTML Agenda for 24/10/13 (from mdolan@newtbt.com on 2013-10-23)
  8. TTML Agenda for 24/10/13 (from nigel.megitt@bbc.co.uk on 2013-10-23)
  9. ISSUE-287 (Binary Tunnelling): Generic ability to tunnel BASE64 encoded binary files for legacy support [TTML2] (from sysbot+tracker@w3.org on 2013-10-23)

Related notes:

Related to ISSUE-241 https://www.w3.org/AudioVideo/TT/tracker/issues/241

Nigel Megitt, 23 Oct 2013, 14:25:55

Nigel: P1

Philippe Le Hégaret, 24 Oct 2013, 15:53:42

Owner is Andreas + Nigel (i.e. EBU)

Nigel Megitt, 28 Oct 2013, 11:58:32

Add support for author supplied embedded data resources and external data resources.

https://dvcs.w3.org/hg/ttml/rev/d16d284100b9

Glenn Adams, 22 Nov 2014, 13:34:55

Display change log ATOM feed


David Singer <singer@apple.com>, Nigel Megitt <nigel.megitt@bbc.co.uk>, Chairs, Thierry Michel <tmichel@w3.org>, Philippe Le Hégaret <plh@w3.org>, Atsushi Shimono <atsushi@w3.org>, Staff Contacts
Tracker: documentation, (configuration for this group), originally developed by Dean Jackson, is developed and maintained by the Systems Team <w3t-sys@w3.org>.
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