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MPEG Dynamic Adaptive Streaming over HTTP (DASH) is a new streaming standard that has been recently ratified as an international standard (IS). In comparison to other streaming systems, e.g., HTTP progressive download, DASH is able to handle varying bandwidth conditions providing smooth streaming. Furthermore, it enables NAT and Firewall traversal, flexible and scalable deployment as well as reduced infrastructure costs due to the reuse of existing Internet infrastructure components, e.g., proxies, caches, and Content Distribution Networks (CDN). Recently, the Hypertext Transfer Protocol Bis (httpbis) working group of the IETF has officially started the development of HTTP 2.0. Initially three major proposals have been submitted to the IETF i.e., Googles' SPDY, Microsofts' HTTP Speed+Mobility and Network-Friendly HTTP Upgrade, but SPDY has been chosen as working draft for HTTP 2.0. In this paper we implemented MPEG-DASH over HTTP 2.0 (i.e., SPDY), demonstrating its potential benefits and drawbacks. Moreover, several experimental evaluations have been performed that compare HTTP 2.0 with HTTP 1.1 and HTTP 1.0 in the context of DASH. In particular, the protocol overhead, the performance for different round trip times, and DASH with HTTP 2.0 in a lab test scenario has been evaluated in detail.

Dynamic Adaptive Streaming over HTTP/2.0

Christopher Mueller

Smau Milano 2016 - Claudio Carli, Assintel

SMAU

libdash is a library that provides an object orient (OO) interface to the MPEG-DASH standard. Features - Cross platform build system based on cmake that includes Windows, Linux and Mac. - Open source available and licensed under the LGPL. - Implements the full MPEG-DASH standard according to ISO/IEC 23009-1, Information Technology Dynamic Adaptive Streaming over HTTP (DASH) Part 1: Media Presentation Description and Segment Formats - Handles the download and xml parsing of the MPD. Based on that it provides an OO based interface to the MPD. Media elements, e.g., SegmentURL, SegmentTemplate, etc., are downloadable in that OO based structure and can be downloaded through libdash, which internally uses libcurl. - Therefore basically all protocols that libcurl supports, e.g., HTTP, FTP, etc. are supported by libdash. - However it also provides a configurable download interface, which enables the use of external connections that can be implemented by the user of the library for the download of media segments. - The use of such external connections will be shown in the libdash_networkpart_test project which is part of libdash solution and also part of the cross platform cmake system and therefore usable on Windows, Linux and Mac. - The project contains a sample multimedia player that is based on ffmpeg which uses libdash for the playback of one of our dataset MPDs. - The development is based on Windows, therefore the code contains a VS10 solution with additional tests and the sample multimedia player.

libdash 2.0