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w3c / ttml2

Timed Text Markup Language 2 (TTML2)
https://w3c.github.io/ttml2/
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Add #presentation-audio feature designation (#1068). #1097

Closed skynavga closed 5 years ago

skynavga commented 5 years ago

Closes #1068.

skynavga commented 5 years ago

I wasn't sure whether you @nigelmegitt wanted to include #audio as a subset of this new feature designator, but I put it in. just in case Let me know if you think it should come out, or if #audio-description or #audio-speech should be included.

nigelmegitt commented 5 years ago

@skynavga Interesting question about #audio - I think the best starting point is to include it, however it does mean that a processor that only supports #audio-speech and not #audio somehow does not count as supporting #presentation-audio. This is a reflection of the fact that at present there is no easy way to generate reusable audio resources from the text to speech processor, in implementations.

One way around this is to define yet another feature, #presentation-speech, which is probably the consistent thing to do. That would not require any layout processing or #audio but would require support for #audio-speech as well as the other features that the #presentation-XXX features require - #content, #core etc.

skynavga commented 4 years ago

Tests at w3c/ttml2-tests#249.