The document discusses MPEG-DASH reference software and conformance. It describes how the reference software serves to validate the specification, clarify ambiguities, and test for interoperability. Components include an MPD validator, segment conformance checker, dynamic service validator, DASH access client software, and sample players and encoding tools. The reference software provides a comprehensive toolset for conformance testing and verification of the DASH specification.

1. WE MAKE YOUR VIDEOS FLOW
Industry Leading Streaming Solutions
DASH Reference Software
and Conformance
2014 NAB Show
DASH Talks NAB 14
April 8, Las Vegas, NV, USA
Dipl.-Ing. Dr. Christian Timmerer
CIO | bitmovin GmbH & Alpen-Adria-Universität Klagenfurt
christian.timmerer@bitmovin.com
blog.timmerer.com

2. Scope of Reference Software
and Conformance
• 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
Scope
1

3. Components
• 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
• Computing Now theme
– Recent MPEG standards for future media ecosystems
– http://bit.ly/1h5tMgq
http://dashif.org/software/
Components
2

4. Cloud-based MPEG-DASH Transcoding
and Streaming for Broadcast Scenarios
• Using scalable & flexible cloud infrastructure
• MPEG-DASH representations for mobile devices (320p)
up to PC/TV (1080p)
• MPEG-DASH playback on multiple devices using HTML5
& Flash clients
• Live / Timeshift / OnDemand using the same MPEG-
DASH content
CLOUD-BASED
TRANSCODING &
STREAMING
MPEG-DASH
CLIENTS
CUSTOMER
PORTAL
SHOWCASE
 Live
 Timeshift
 Catchup using
EPG Data
Cloud-DASH
3

5. Conclusions
• MPEG-DASH Reference Software and
Conformance
– Comprehensive toolset for conformance
testing
– Verification and clarification of the written
specification
• Complementary DASH-IF software tools
– Reference client, sample players, sample
segmenters and packagers, libraries,
manifest and ISOBMFF validator
➪ http://dashif.org/software/
Conclusions
4

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Industry Leading Streaming Solutions
Bitmovin
We make your media flow
Bitdash/Libdash
bitmovin GmbH
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E office@bitmovin.net
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