MPEG-DASH Conformance and Reference Software
Upcoming SlideShare
Loading in...5
×
 

MPEG-DASH Conformance and Reference Software

on

  • 9,925 views

 

Statistics

Views

Total Views
9,925
Views on SlideShare
2,714
Embed Views
7,211

Actions

Likes
6
Downloads
49
Comments
0

50 Embeds 7,211

http://multimediacommunication.blogspot.co.at 3240
http://www.scoop.it 2105
http://multimediacommunication.blogspot.com 589
http://multimediacommunication.blogspot.co.uk 171
http://multimediacommunication.blogspot.in 169
http://multimediacommunication.blogspot.de 135
http://multimediacommunication.blogspot.fr 130
http://multimediacommunication.blogspot.ca 72
http://multimediacommunication.blogspot.kr 65
http://multimediacommunication.blogspot.co.il 51
http://multimediacommunication.blogspot.com.es 51
http://multimediacommunication.blogspot.jp 47
http://multimediacommunication.blogspot.com.br 45
http://multimediacommunication.blogspot.fi 30
http://multimediacommunication.blogspot.se 29
http://multimediacommunication.blogspot.ch 27
http://multimediacommunication.blogspot.it 27
http://multimediacommunication.blogspot.gr 26
http://multimediacommunication.blogspot.tw 24
http://multimediacommunication.blogspot.no 21
http://multimediacommunication.blogspot.ru 18
http://multimediacommunication.blogspot.pt 18
http://multimediacommunication.blogspot.com.au 18
http://feeds.feedburner.com 17
http://www.directrss.co.il 11
http://translate.googleusercontent.com 9
http://multimediacommunication.blogspot.sg 7
http://multimediacommunication.blogspot.mx 7
http://multimediacommunication.blogspot.hk 6
http://multimediacommunication.blogspot.ie 6
http://multimediacommunication.blogspot.nl 5
http://131.253.14.66 4
http://multimediacommunication.blogspot.be 4
https://www.google.co.in 3
http://multimediacommunication.blogspot.ro 2
http://multimediacommunication.blogspot.hu 2
http://multimediacommunication.blogspot.com.ar 2
http://multimediacommunication.blogspot.com.tr 2
http://multimediacommunication.blogspot.dk 2
http://multimediacommunication.blogspot.ae 2
http://www.google.com 2
https://twitter.com 2
https://www.linkedin.com 1
http://multimediacommunication.blogspot.cz 1
http://63.249.66.211 1
https://www.google.es 1
http://www.feedspot.com 1
http://plus.url.google.com 1
http://prlog.ru 1
http://multimediacommunication.blogspot.sk 1
More...

Accessibility

Categories

Upload Details

Uploaded via as Microsoft PowerPoint

Usage Rights

© All Rights Reserved

Report content

Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
    Processing…
Post Comment
Edit your comment

MPEG-DASH Conformance and Reference Software MPEG-DASH Conformance and Reference Software Presentation Transcript

  • MPEG-DASH Conformance and Reference Software ISO/IEC 23009-2 Christian Timmerer Alpen-Adria-Universität Klagenfurt (AAU)  bitmovin GmbH research.timmerer.com  blog.timmerer.com  dash.itec.aau.at  bitmovin.net christian.timmerer@itec.aau.at, christian.timmerer@bitmovin.net 105th MPEG Meeting, Vienna, Austria July 2013
  • Outline • Introduction and overview • Media presentation conformance • DASH access client reference software: libdash • Sample software – Clients: sample player, GPAC – Segmenter: MP4Box • Summary July 2013 2Christian Timmerer (AAU/bitmovin)
  • Introduction • Conformance and reference software of MPEG-DASH serves three main purposes: – validation of the written specification; – clarification of the written specification; and – conformance testing for checking interoperability for the various applications against the reference software which aims to be compliant with ISO/IEC 23009 • ISO/IEC 23009-2: media presentation conformance, test vectors, DASH access engine reference software, sample software July 2013 3Christian Timmerer (AAU/bitmovin)
  • Overview • Media presentation conformance – MPD validator: xlink, schema validation, add’l validation rules – Segment conformance: check ISOBMFF, M2TS against DASH specification – Dynamic service validator: dynamic updates of the MPD • DASH conformance sequences • DASH access client reference software – libdash: access to information contained in the MPD + schedule download of segments • Sample software – Sample player: utilizes libdash, GUI, manual adaptation logic – GPAC player: integrated player or embeddable DASH engine – MP4Box segmenter: create segments + MPD based on encoded content July 2013 4Christian Timmerer (AAU/bitmovin)
  • MPD Conformance Free online MPD validation service accessible at http://dash.itec.aau.at July 2013 5Christian Timmerer (AAU/bitmovin) Resolves all W3C XLINK attributes as defined in MPEG-DASH Part 1 Performs the XML validation (i.e., well-formed and valid) against the MPD schema as defined in W3C XML and W3C XML SCHEMA Performs the Schematron validation as defined in ISO/IEC 19747-3 according to the rules defined in MPEG-DASH Part 2
  • libdash • MPEG-DASH Part 1 defines XML-based MPD and segment formats (M2TS, ISOBMFF) – MPD reflects the DASH data model providing HTTP URLs to downloadable segments • Adaptation logic is deliberately excluded from the specification and left open for industry competition • libdash provides the following features: – Object-oriented interface into the MPD – Access information within MPD and schedule download of segments – External interfaces: DASH streaming control (incl. adaptation logic), segment parser, media player – deliberately not implemented: may vary across use cases, deployments, and go beyond what is normatively specified • libdash has full standard support, well-defined interfaces, and enables integration within a media ecosystem ➜ libdash is an enabler! July 2013 7Christian Timmerer (AAU/bitmovin)
  • Sample Player • Qt-based cross-platform GUI + ffmpeg based on libdash • Works with conformance bitstreams, DASH-IF test vectors, and major DASH datasets July 2013 Christian Timmerer (AAU/bitmovin) 8 Select available MPDs Video content Download MPD, start/stop streaming Interactive seamless switching of AdaptationSets and Representations Segment, frame, audio, video buffer
  • GPAC Players for DASH • Open Source project http://gpac.sourceforge.net • Integrated player or embeddable DASH engine – Multi-platform: desktop, mobile – Playback of a very large subset of DASH conformant content • M2TS and ISOBMFF segments • "static" or "dynamic" presentations • Live, Main, OnDemand and Simple profiles – Support for quality changes • Interactively or automatically (bandwidth estimation and limitation) July 2013 9Christian Timmerer (AAU/bitmovin)
  • GPAC MP4Box for Segmenting • Conformant generation of – Media files (ISOBMFF, M2TS) – MPD (all profiles) • Support for several MPD syntax options – SegmentList, SegmentTemplate, SegmentTimeline • Automatic mapping of the inputs into adaptation sets, representations, groups, assignment of roles – Based on the content characteristics • Flexible generation of segments and subsegments with possible indexing, RAP alignment, and bitstream switching features • Generation of "dynamic" MPD and segments and updates from pre-recorded content July 2013 10Christian Timmerer (AAU/bitmovin)
  • Summary • MPEG-DASH conformance and reference software available and accessible via MPEG SVN repository – Includes conformance bitstreams for MPDs, segments, and combinations thereof – libdash + sample player: http://www.bitmovin.net/libdash/ – GPAC: http://gpac.sourceforge.net • Additional useful resources – DASH dataset (dash.itec.aau.at): full-length movies w/ different segment sizes, spatial resolutions, bitrates, and genre – Distributed DASH dataset (dash.itec.aau.at): one dataset distributed across seven sites (Klagenfurt, Paris, Prague, Torino, Crete, Delft, Taiwan), usage of multiple BaseURL elements – DASH Industry Forum (dashif.org): DASH-AVC/264 interoperability points, identifier repository, reference client (dash.js, https://github.com/Dash-Industry-Forum/dash.js/), sample players, clients July 2013 11Christian Timmerer (AAU/bitmovin)