[ttml2] Add #opacity-image feature

spoeschel has just created a new issue for https://github.com/w3c/ttml2:

== Add #opacity-image feature ==
The TTML2 features related to the `tts:opacity` attribute currently don't cover the case that this attribute can also apply to an `image` element. So a respective feature has to be added, e.g. `#opacity-image`.

Please view or discuss this issue at https://github.com/w3c/ttml2/issues/883 using your GitHub account

Received on Thursday, 5 July 2018 13:35:47 UTC