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At present, the image profile prohibits the use of smpte:image, forcing authors to always use external images. I believe this a bad long term strategy and unnecessarily restrictive.
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RFC6381 defines MIME type parameters "codecs" and "profiles" for ISO BMFF-wrapped content. We are defining "codecs" for "application/ttml+xml". We should clarify in the TTML IANA registration text so …
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1. Proposal
Working collaboratively with filmmakers in the production of subtitles, we have used fade in/outs, but only for open subtitles, burnt on the image, not for closed subtitles.
We would lik…
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I often play media which does not include audio tracks or subtitles in my preferred language. My solution is to acquire standalone subtitle files from external sources.
However, one omission from t…
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Some of the schema documents set ` xmlns:vc="http://www.w3.org/2007/XMLSchema-versioning" vc:minVersion="1.1"` . What is the reasoning to set this to 1.1 and not 1.0? What are the consequences? I quic…
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10.2.52 tts:writingMode
http://w3c.github.io/ttml2/spec/ttml2.html#style-attribute-writingMode
10.2.46 tts:textOrientation
http://w3c.github.io/ttml2/spec/ttml2.html#style-attribute-textOrientati…
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Hi, I was trying to understand better everything that concerns regions association in a document.
I'm following the [TTML CR Snapshot](https://w3c.github.io/ttml2/).
When building the ISD, first…
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**Have you read the [FAQ](https://bit.ly/ShakaFAQ) and checked for duplicate open issues?**
Yes
**What version of Shaka Player are you using?**
4.2.2, 4.3.4
**Can you reproduce the iss…
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First take at this:
* Add a `class` attribute to support CSS selectors;
* Add a "supports generic CSS properties" feature designator;
* Add an attribute (hopefully, rather than an element) that a…
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TTML2 specifies:
_When applied to a p element, the computed value of `tts:direction` explicitly establishes the paragraph level as specified by [UAX9], §4.3, Higher Level Protocol HL1._
It is un…