[ttml2] Pull Request: Deprecate pixels without specified extent (#330).

skynavga has just submitted a new pull request for https://github.com/w3c/ttml2:

== Deprecate pixels without specified extent (#330). ==
Closes #330.

See https://github.com/w3c/ttml2/pull/556

Received on Monday, 15 January 2018 07:07:16 UTC