DASH at the ACM Multimedia 2011
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This document discusses a VLC Media Player plugin that enables Dynamic Adaptive Streaming over HTTP (DASH). It introduces DASH and its data model. The plugin architecture has four major components and two controller classes. It provides a simple interface for researchers to integrate new adaptation logics and is flexible to allow improvements like persistent connections. A demo uses a virtual shaping network to demonstrate dynamic adaptation based on available bandwidth. The document concludes by encouraging involvement in further developing DASH capabilities.
DASH at the ACM Multimedia 2011
- 1. A VLC Media Player Plugin enabling Dynamic Adaptive Streaming over HTTP (DASH) Christopher Mueller and Christian Timmerer Alpen-Adria Universität Klagenfurt (AAU) Faculty of Technical Sciences (TEWI) Institute of Information Technology (ITEC) Multimedia Communication (MMC) Christopher Mueller
- 2. Outline • Introduction – Dynamic Adaptive Streaming over HTTP – DASH Data Model • DASH VLC Media Plugin – Plugin Architecture – Plugin Features – Demo • Conclusion and Further Work Christopher Mueller, Alpen-Adria-Universität 29/11/2011 2 Klagenfurt, Austria
- 3. Dynamic Adaptive Streaming over HTTP • Problems – Firewalls – NAT’s – Fluctuating bandwidth – Rebuffering – No reuse of the internet infrastructure e.g. caches, proxies, CDNs – Flexible and easy deployment (Netflix, Hulu etc.) Christopher Mueller, Alpen-Adria-Universität 29/11/2011 3 Klagenfurt, Austria
- 4. DASH System Architecture ISOBMFF … ISO Base Media File Format e.g. mp4) M2TS … MPEG-2 Transport Stream MF … Manifest Format e.g. MPD, FMF DF … Delivery Format e.g. mp4s, 3gs, chopped media content Christopher Mueller, Alpen-Adria-Universität 29/11/2011 4 Klagenfurt, Austria
- 5. DASH Data Model Christopher Mueller, Alpen-Adria-Universität 29/11/2011 5 Klagenfurt, Austria
- 6. DASH Data Model • MPD: Top level container with basic information e.g. EPG • Period: Separates the content for e.g. ad insertion or for camera angle changes • Group: Logical grouping of Representations by resolution, codec etc. • Subset: Restricts the combination of groups e.g. prohibit resolution switching • Segment: The chopped media content Christopher Mueller, Alpen-Adria-Universität 29/11/2011 6 Klagenfurt, Austria
- 7. DASH Plugin Architecture • Four major components and two controller classes • Easy Adaptation Logic Interface for Researchers and Developers • Flexible HTTP structure for further improvements e.g. persistent connections Christopher Mueller, Alpen-Adria-Universität 29/11/2011 7 Klagenfurt, Austria
- 8. DASH Plugin Features • Officially part of VLC • Provides a simple interface to integrate new Adaptation Logics • Dynamic adaptation to the available bandwidth • Flexible for further improvements e.g. profiles, persistent connections and pipelining • Source code is available through the VLC git repository and at: http://www-itec.aau.at/dash Christopher Mueller, Alpen-Adria-Universität 29/11/2011 8 Klagenfurt, Austria
- 9. Demo • Virtual Shaping Network Christopher Mueller, Alpen-Adria-Universität 29/11/2011 9 Klagenfurt, Austria
- 10. Conclusion and Further Work • VLC DASH Plugin – Officially part of VLC – Dynamic adaptation – Provides a simple interface to integrate new Adaptation Logics – Flexible for further improvements e.g. profiles, persistent connections and pipelining Christopher Mueller, Alpen-Adria-Universität 29/11/2011 10 Klagenfurt, Austria
- 11. Thank you for your attention DASH at the Alpen-Adria University of Klagenfurt http://www-itec.aau.at/dash Join this activity, everyone is invited – get involved in and exited about DASH! Christopher Mueller, Alpen-Adria-Universität 29/11/2011 11 Klagenfurt, Austria