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Implicit duration of anonymous spans + error at MediaSeqTiming002.xml?

From: Pierre-Anthony Lemieux <pal@sandflow.com>
Date: Fri, 22 Dec 2017 23:26:27 -0800
Message-ID: <CAF_7JxDuut-jqukincLRdhmSH=xqjjBWZuuZb75J8sWKv5dZoQ@mail.gmail.com>
To: TTWG <public-tt@w3.org>
Hi all,

The discussion at [1] on the implicit duration of singleton spans has
prompted me to review the TTML1 and IMSC1 tests.

[1] https://github.com/w3c/ttml1/issues/193

I am wondering if MediaSeqTiming002.xml might have incorrect guidance.
As described at [2], it implies that "default duration for elements in
[a seq container] is 0" and that the following should not be rendered:

<div timeContainer="seq" dur="20s">
...
<p begin="00:00:05:00">This text must not appear.</p>
...
</div>

Is that correct? Isn't the implicit duration of the <p> indefinite
since its anonymous span has an indefinite duration per TTML1?

Best,

-- Pierre

[2] https://github.com/w3c/ttml1/issues/303
Received on Saturday, 23 December 2017 07:27:13 UTC

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