wiki:WiMAX/WiMAX-Tutorial/Dash/02

Version 1 (modified by cbn228@nyu.edu, 6 years ago) (diff)

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MDP

Media Presentation Description, as mentioned before is a XML file. It is located in the server along with the media content it describes. Below is part of the file as presented at http://www-itec.uni-klu.ac.at/ftp/datasets/mmsys12/BigBuckBunny/bunny_2s_480p_only/bunny_Desktop.mpd Universität Klagenfurt

This file defines:

  • base URL - The URL/folder where the chunks are stored
  • Segment URL - Where each segment in particular can be found. This is relative to the Base URL
  • Representation - Presentation Parameters such as codecs, type, width, hight etc.
  • Duration and also Bitrate
<MPD xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="urn:mpeg:DASH:schema:MPD:2011" xsi:schemaLocation="urn:mpeg:DASH:schema:MPD:2011" profiles="urn:mpeg:dash:profile:isoff-main:2011" type="static" mediaPresentationDuration="PT0H9M56.46S" minBufferTime="PT15.0S">
<BaseURL>
http://www-itec.uni-klu.ac.at/ftp/datasets/mmsys12/BigBuckBunny/bunny_2s_480p_only/
</BaseURL>
<Period start="PT0S">
<AdaptationSet bitstreamSwitching="true">
<Representation id="0" codecs="avc1" mimeType="video/mp4" width="480" height="360" startWithSAP="1" bandwidth="101492">
<SegmentBase>
<Initialization sourceURL="bunny_2s_100kbit/bunny_480_100kbit_dash.mp4"/>
</SegmentBase>
<SegmentList duration="2">
<SegmentURL media="bunny_2s_100kbit/bunny_2s1.m4s"/>
<SegmentURL media="bunny_2s_100kbit/bunny_2s2.m4s"/>
<SegmentURL media="bunny_2s_100kbit/bunny_2s3.m4s"/>
<SegmentURL media="bunny_2s_100kbit/bunny_2s4.m4s"/>
<SegmentURL media="bunny_2s_100kbit/bunny_2s5.m4s"/>
<SegmentURL media="bunny_2s_100kbit/bunny_2s6.m4s"/>
<SegmentURL media="bunny_2s_100kbit/bunny_2s7.m4s"/>
<SegmentURL media="bunny_2s_100kbit/bunny_2s8.m4s"/>
<SegmentURL media="bunny_2s_100kbit/bunny_2s9.m4s"/>
<SegmentURL media="bunny_2s_100kbit/bunny_2s10.m4s"/>
<SegmentURL media="bunny_2s_100kbit/bunny_2s11.m4s"/>
<SegmentURL media="bunny_2s_100kbit/bunny_2s12.m4s"/>
<SegmentURL media="bunny_2s_100kbit/bunny_2s13.m4s"/>
<SegmentURL media="bunny_2s_100kbit/bunny_2s14.m4s"/>
<SegmentURL media="bunny_2s_100kbit/bunny_2s15.m4s"/>
<SegmentURL media="bunny_2s_100kbit/bunny_2s16.m4s"/>

........

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