[ttml2] Pull Request: Remove ttp:mediaOffset (#323).

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

== Remove ttp:mediaOffset (#323). ==
Closes #323.

See https://github.com/w3c/ttml2/pull/536

Received on Saturday, 6 January 2018 00:30:40 UTC