Timing and Synchronisation

7 Timing and Synchronisation At the Heart of SMIL

7.1 Role of Timing ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

7.2 Expressing Timing Values ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

7.3 Defining Timing for Clips ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

7.4 Element Timing Within Groups ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

7.5 Timing in Nested Element Groups ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

7.5.1 Example of Nested Timing ,[object Object],[object Object],[object Object],[object Object],<par>  <audio … /> <seq>  </seq> <par>  <img … /> … <excl …/>  </excl …/> </par>  <video … /> <audio … /> </par>

7.6 Timing Attributes    Time & Synch repeatCount    Time & Synch repeatDur     Time & Synch fill     Time & Synch endsync    Media clipBegin clipEnd      Time & Synch begin end dur QT IEv6 RealONE SMIL2 SMIL1 Module Attribute

7.7 begin end and dur attributes ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],<video src=“…” begin=“10”> <audio src=“audio-file” begin=“10” end=“20” … />  <audio src=“audio_file” begin=“10” dur=“10” … />

7.7.1 dur attribute continued ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],<video src=“video_file” … dur=“media” …/> <video src=“video_file” … dur=“indefinite” …/>

7.8 clipBegin and clipEnd ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object], <video src=“video_file” … clipBegin=“10” clipEnd=“25” …/>

7.9 Ending groups with endsync ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],<excl endsync=“vid2”> <video id=“vid1” …/> <video id=“vid2” …/> <video id=“vid3” …/> </excl>

7.9.1 endsync attribute values IEv6 only. Ends when the group ends ignoring the enclosed clips (elements) This is the same as the behaviour in RealONE when a group has a dur or end attribute value set which overrides the endsync value. none Ends the group when the clip (element) with this id has finished. Note in EIv6 this does not appear to work with time based media id This is the default. Ends the group once the last clip (element) has finished last Ends the group when the first clip (element) has finished first Ends a group once all clips (elements) have finished all

7.10 Using the fill attribute ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],<par> <img src=“ image_ file ” fill=“freeze” … /> <audio src=“ audio_file ” … /> </par>

7.11 repeatCount and repeatDur ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],<video src=“ video_file ” repeatCount=“ nn.n| indefinite” … /> … <video src=“video_file” repeatDur=“time|indefinite” …/>

7.12 Advanced Timing ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],<par> <image id=“image3” …/> <image id=“image4” begin=“image3.end” …/> <video src=“video_file” begin=“image3.end+3” end=“image4.begin-2” …/> … </par>

7.12.1 Timing and Events ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],<excl …> <video id=“vid1” src=“ video_file ” begin=“button1. some_event ” …/> … </excl>

7.13 Review ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Timing and Synchronisation

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