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RE: [Questions] multiple begin/end lists in par element

From: Kari Pihkala <kpihkala@cc.hut.fi>
Date: Thu, 13 Jun 2002 14:30:10 +0300 (EET DST)
To: www-smil@w3.org
Message-ID: <Pine.OSF.4.10.10206131427080.30026-100000@alpha.hut.fi>


Hi,

about X-Smiles, it only implements the SMIL 2.0 Basic profile, thus
MultiArcTiming module and examples below won't work.

 - Kari

On Thu, 13 Jun 2002, Patrick Schmitz wrote:

> Hello -
> 
> Sorry for the delay in answering, but I have been a bit busy.
> 
> My answers are inline.  Note that you can also post these types of questions
> to the public SMIL list at www-smil@w3.org. I have copied them on my
> response, in case anyone takes issue with my comments.
>   -----Original Message-----
>   From: D.K Bay [mailto:pango@samsung.com]
>   Sent: Wednesday, June 05, 2002 4:06 AM
>   To: cogit@ludicrum.org
>   Subject: [Questions] multiple begin/end lists in par element
> 
> 
>   While reading SMIL 2.0 document, i was confused how to handle some cases.
>   Please clarify the following questions.
> 
>   Q1. With below example, two intervals can be generated([0s, 3s] and [8s,
> 11s])
>   I think Active Duration of audio is 11s, so par element will finish at
> 11s.
>   But, X-smiles and Real One player don't play like my thought.
>   Please, tell me exact Active Duration of audio and par.
> 
>   <example1>
>   ...
>       <par>
>         <audio id="audio1" src="geminidecho.wav" begin="0s; 8s" end="3s;
> 11s" />
>       </par>
>   ...
> 
>   [Patrick] In this example, the implicit simple duration of the par is
> determined by the default value for endsync, "last". As noted in the
> section:
> http://www.w3.org/TR/smil20/smil-timing.html#Timing-endsyncAttribute, this
> is defined to be the last active end time of any child with a resolved begin
> time. In the example, all times are clearly resolved, and so the par should
> have simple (and thus active) duration equal to 11 seconds, as you note.
> 
>   [Patrick] Perhaps one of the folks from Real can comment on the player
> behavior. If Kari is watching, he may be able to comment on the X-Smiles
> behavior.
> 
>   Q2. In the below example2, the interval must be changed because of dur
> attribute: [0,2], [8,10]
>   Is this right?
> 
>   <example2>
>   ...
>       <par>
>         <audio id="audio1" src="geminidecho.wav" dur = "2s" begin="0s; 8s"
> end="3s; 11s" />
>       </par>
>   ...
> 
>   [Patrick] Yes, as formally defined in
> http://www.w3.org/TR/smil20/smil-timing.html#Timing-ComputingActiveDur.
> 
>   Q3. If the above par's endSync = "first", then when the par element
> finishs?
>         There are two valid intervals. Should audio element play for two
> intervals or only the first interval in this case?
> 
>   [Patrick] With endsync="first", it will end with the earliest active end.
> This is 3s for Q1, and 2s for Q2.
> 
>         How about if endSync = "last"? Can audio element play two intervals?
> 
>   [Patrick] This is the same as the default behavior, and so my answers to
> Q1 and Q2 apply here as well.
> 
>   Q4. if the audio element has min, max attribute, these two attributes
> affects the two valid current interval([0,3],[8,11]) or entire
> interval[0~10]?
> 
>   [Patrick] min and max affect each active interval ([0,3],[8,11])
> individually.
> 
>   [Patrick] Hope this helps - Patrick
> 
Received on Thursday, 13 June 2002 07:30:12 GMT

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