[ttml2] Pull Request: Add #opacity-image feature designation (#883).

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

== Add #opacity-image feature designation (#883). ==
Closes #883.

See https://github.com/w3c/ttml2/pull/1133

Received on Sunday, 14 July 2019 06:21:48 UTC