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Media Fragments Working Group

Media Fragments Working Group. State of the Art. MPEG-7 TimedText HTML 5 video SVG. MPEG-7. Description standard only support for descriptions, no hyperlinking Divides video into “VideoSegments” Described by timestamp, spatial region or both Timestamp Begin: MediaTimePoint

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Media Fragments Working Group

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  1. Media Fragments Working Group State of the Art

  2. MPEG-7 • TimedText • HTML 5 video • SVG

  3. MPEG-7 • Description standard • only support for descriptions, no hyperlinking • Divides video into “VideoSegments” • Described by timestamp, spatial region or both • Timestamp • Begin: MediaTimePoint • YYYY-MM-DDThh:mm:ss:nnnFNNN • Duration: MediaDuration • PnDTnHnMnSnNnF (nD: number of days,..) • Spatial region • E.g. <Poly><Coords>40 300,105 210,…,320 240</Coords></Poly>

  4. TimedText • A standard to show text at a certain time • 3 timing attributes: begin, end, and duration • Semantics equal to SMIL 2.1 • Time can represent a clock-time(h:m:s:f) or an offset-time (count fraction? metric) • E.g. <div xml:lang="en“><p begin="03:01:33:14" dur="9.4s">text1</p> <p begin="5s" dur="4s">text2</p> </div>

  5. HTML 5 Video • HTML 5 adds a video element to HTML • No support for fragmentation or time reference • Example:<video id="v1" src=1066dgfql8a62.oggcontrols="true" autoplay=”true”><p>Sorry, your browser does not support the &lt;video&gt; element.</p></video> • HTML 5 has Time Datatypes: • Date: YYYY-MM-DD • Time: hh:mm(:ss) • Date and Time: YYYY-MM-DDThh:mm(:ss) • Time zones: • UTC: add a Z at the end • Others: Add time difference to UTC e.g. +7:30 or -6

  6. SVG • No support for temporal fragmentation • Start time and duration can be defined • Start time: • When will the video start to play • Can be onLoad or after a delay • Example: <svgxmlns=“..” width="320" height="240" viewBox="0 0 320 240"><desc>SVG 1.2 video example</desc>  <g>    <video xlink:href="test.avi“ type="video/x-msvideo“x="50" y="50" begin=”5s” dur=”20.0s” repeatCount="indefinite"/></g> </svg>

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