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Re: Interaction between <set> elements and content elements in seq containers

From: Pierre-Anthony Lemieux <pal@sandflow.com>
Date: Fri, 29 Dec 2017 11:50:08 -0800
Message-ID: <CAF_7JxDmzWUBvXmbprPd9DJV8GpZQ9jetHMPYwruzTa3jVOkPQ@mail.gmail.com>
To: TTWG <public-tt@w3.org>
Hi all,

See proposed algorithm at https://github.com/w3c/ttml1/issues/311

Best,

-- Pierre

On Sat, Dec 23, 2017 at 2:35 PM, Pierre-Anthony Lemieux
<pal@sandflow.com> wrote:
> Hi all,
>
> Further delving into the semantics of "seq" containers, the following
> example explores the interaction between <set> elements and content
> elements:
>
> <p tts:color="yellow" timeContainer="seq" tts:color="black">
>    <set dur="1s" tts:color="red"/>
>    <set dur="1s" tts:color="green"/>
>    <set dur="1s" tts:color="blue"/>
>    <span dur="2s">Black text</span>
> </p>
>
> I would think that:
>
> - "Black text" appears 3 seconds after the beginning of the <p>
> - "Black text" appears for 2 seconds
> - "Black text" is drawn black
> - the implicit and effective duration of the <p> is 5 seconds
>
> In contrast, in the following example the <p> appears for only 1 second
>
> <p tts:color="yellow" timeContainer="seq" tts:color="black" dur="4s">
>    <set dur="1s" tts:color="red"/>
>    <set dur="1s" tts:color="green"/>
>    <set dur="1s" tts:color="blue"/>
>    <span dur="2s">Black text</span>
> </p>
>
> Looking forward to your thoughts.
>
> Best,
>
> -- Pierre
Received on Friday, 29 December 2017 19:50:55 UTC

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