Reference numbe
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ISO/IEC 14496-14:2003(E)
©
ISO/IEC 2003
INTERNATIONAL
STANDARD
ISO/IEC
14496-14
First edition
2003-11-15
Information technology — Coding of
audio-visual objects —
Part 14:
MP4 file format
Technologies de l'information — Codage des objets audiovisuels —
Partie 14: Format de fichier MP4
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ISO/IEC 14496-14:2003(E)
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ISO/IEC 14496-14:2003(E)
© ISO/IEC 2003 — All rights reserved iii
Contents Page
Foreword ............................................................................................................................................................ iv
Introduction ........................................................................................................................................................ v
0.1 Derivation............................................................................................................................................... v
0.2 Interchange ............................................................................................................................................ v
0.3 Content Creation ................................................................................................................................... v
0.4 Streamed presentation ........................................................................................................................ vi
1 Scope...................................................................................................................................................... 1
2 Normative references ........................................................................................................................... 1
3 Storage of MPEG-4................................................................................................................................ 1
3.1 Elementary Stream Tracks ................................................................................................................... 1
3.2 Track Identifiers .................................................................................................................................... 3
3.3 Synchronization of streams ................................................................................................................. 4
3.4 Composition .......................................................................................................................................... 5
3.5 Handling of FlexMux ............................................................................................................................. 5
4 File Identification................................................................................................................................... 6
5 Additions to the Base Media Format................................................................................................... 6
5.1 Object Descriptor Box .......................................................................................................................... 7
5.2 Track Reference Types......................................................................................................................... 7
5.3 Track Header Box.................................................................................................................................. 8
5.4 Handler Reference Types ..................................................................................................................... 8
5.5 MPEG-4 Media Header Boxes .............................................................................................................. 8
5.6 Sample Description Boxes................................................................................................................... 8
5.7 Degradation Priority Values ............................................................................................................... 10
6 Template fields used........................................................................................................................... 10
Annex A (informative) Patent statements ...................................................................................................... 11
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ISO/IEC 14496-14:2003(E)
iv © ISO/IEC 2003 — All rights reserved
Foreword
ISO (the International Organization for Standardization) and IEC (the International Electrotechnical
Commission) form the specialized system for worldwide standardization. National bodies that are members of
ISO or IEC participate in the development of International Standards through technical committees
established by the respective organization to deal with particular fields of technical activity. ISO and IEC
technical committees collaborate in fields of mutual interest. Other international organizations, governmental
and non-governmental, in liaison with ISO and IEC, also take part in the work. In the field of information
technology, ISO and IEC have established a joint technical committee, ISO/IEC JTC 1.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of the joint technical committee is to prepare International Standards. Draft International
Standards adopted by the joint technical committee are circulated to national bodies for voting. Publication as
an International Standard requires approval by at least 75 % of the national bodies casting a vote.
ISO/IEC 14496-14 was prepared by Joint Technical Committee ISO/IEC JTC 1, Information technology,
Subcommittee SC 29, Coding of audio, picture, multimedia and hypermedia information.
ISO/IEC 14496 consists of the following parts, under the general title Information technology — Coding of
audio-visual objects:
Part 1: Systems
Part 2: Visual
Part 3: Audio
Part 4: Conformance testing
Part 5: Reference software
Part 6: Delivery Multimedia Integration Framework (DMIF)
Part 7: Optimized reference software for coding of audio-visual objects
Part 8: Carriage of ISO/IEC 14496 contents over IP networks
Part 9: Reference hardware description
Part 10: Advanced Video Coding (AVC)
Part 11: Scene description and application engine
Part 12: ISO base media file format
Part 13: Intellectual Property Management and Protection (IPMP) extensions
Part 14: MP4 file format
Part 15: Advanced Video Coding (AVC) file format
Part 16: Animation Framework eXtension (AFX)
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ISO/IEC 14496-14:2003(E)
© ISO/IEC 2003 — All rights reserved v
Introduction
0.1 Derivation
This specification defines MP4 as an instance of the ISO Media File format [ISO/IEC 14496-12 and ISO/IEC
15444-12].
The general nature of the ISO Media File format is fully exercised by MP4. MPEG-4 presentations can be
highly dynamic, and there is an infrastructure — the Object Descriptor Framework —, which serves to manage
the objects and streams in a presentation. An Initial Object Descriptor serves as the starting point for this
framework. In the usage modes documented in the ISO Media File, an Initial Object Descriptor would normally
be present, as shown in the following diagrams.
0.2 Interchange
The following diagram gives an example of a simple interchange file, containing two streams.
IOD
moov
mp4 file
mdat
trak (BIFS)
trak (OD)
trak (video)
trak (audio)
…other boxes
Interleaved, time-ordered,
BIFS, OD, video, and audio
access units
Figure 1 — Simple interchange file
0.3 Content Creation
In the following diagram, a set of files being used in the process of content creation is shown.
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