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Specifying `ttp:profile="http://www.w3.org/ns/ttml/profile/imsc1/text"` on `tt` yields the following error message when using the `ttml2` or `ttml1` models:
`Invalid {http://www.w3.org/ns/ttml#para…
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### Description of the feature or enhancement you'd like to see in HandBrake
TTML subtitle files look quite similar to today's HTML, so I wonder whether supporting them to create "overlay subtitles" …
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The following snippet triggers _[E]:[9,64]:Invalid {http://www.w3.org/ns/ttml#parameter}profile value 'http://www.w3.org/ns/ttml/profile/imsc1/text'._ when validated against the IMSC 1.1 model.
```…
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IMSC1.1 [1] states that
>A `div` element that contains a child `image` element SHOULD contain a `metadata` element containing an `altText` named metadata item that is a Text Alternative of the imag…
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Currently if the ruby annotations are too long in comparison with the base text, additional space will be added around the base text.
Example IMSC1.1
![download1](https://user-images.githubusercon…
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Are there any plans on adding TTML based subtitles as allowed input format for DASH and HLS any time soon ? (DVB-TT, SMPTE-TT, EBU-TT, IMSC1 or raw TTML) ?
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Hello,
The TTCONV documentation references [IMSC1.1 Text Profile](https://www.w3.org/TR/ttml-imsc1.1/#text-profile) as one of the three supported output formats (the others being SRT and WebVTT). …
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https://github.com/w3c/imsc-tests/blob/e0213a2815dd4690c1458550adabc458f09a7d77/imsc1/ttml/linePadding/LinePadding006.ttml#L12
`sans-serif` should be `sansSerif`, presumably
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This API only supports video and audio. There is no support for text tracks such as TTML (IMSC1), WebVTT, etc. I posted a note to the W3C Timed Text WG so maybe that will get corrected.
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Should the guidelines include recommendations on signaling the TTML profiles to which the TTML document conform?
See for instance https://www.w3.org/TR/ttml-imsc1/#profile-signaling .