MPEG DASH video #streaming spec ratified as an ISO standard
The Motion Pictures Experts Group (MPEG) DASH specification has been approved by 24 national bodies and ratified as an ISO standard (ISO/IEC 23009-1), and is expected to be published in March 2012.
The specification, a new method of dynamically adaptive streaming over the HTTP protocol, will comprise two types of stream segments – multiplexed streams using MPEG-2 Transport Stream (TS) or elementary streams using fragmented MP4 files (fMP4) – using a Common File Format (CFF) that allows a choice of codecs and digital rights management (DRM) schemes. DASH is expected to eventually supercede all current methods except Apple’s HLS, the differentiating factor being the use of a proprietary manifest file in Apple HLS (known as an .m3u8 file) and a standards-based XML-based manifest file in DASH (known as an MPD or Media Presentation Description file).
Additional work is to be done on the CFF – Â with an emphasis on establishing a common DRM scenario – Â at the next MPEG meeting in San Jose, California, in February 2012, after which device vendors and content suppliers will commence interoperability tests.
[Source: Streaming Media News]
- Â MPEG-DASH Promoters’ Group
- Iraj Sodaga The MPEG-DASH Standard for Multimedia Streaming Over the Internet (IEEE Technical Paper)
- Thomas Stockhammer MPEG’s Dynamic Adaptive Streaming over HTTP (DASH) – (Slide presentation)
- Jan Ozer What is MPEG DASH?
- Tim Siglin CFF: One Format to Rule Them All?
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