ISO/IEC 14496-12:2005
(Main)Information technology — Coding of audio-visual objects — Part 12: ISO base media file format
Information technology — Coding of audio-visual objects — Part 12: ISO base media file format
ISO/IEC 14496-12:2005 specifies the structure and uses of the ISO base media file format. The identical text is published as ISO/IEC 15444-12:2005. This file format is used to contain time-based media such as video and audio. The storage of particular coding schemes is defined in specifications that derive from and reference ISO/IEC 14496-12:2005 and ISO/IEC 15444-12:2005, such as the MPEG-4 file format specified in ISO/IEC 14496-14, or the Motion JPEG file format specified in ISO/IEC 15444-3. This file format is designed to contain timed media information for a presentation in a flexible, extensible format that facilitates interchange, management, editing and presentation of the media. This presentation may be "local" to the system containing the presentation, or may be via a network or other stream delivery mechanism. The file format is designed to be independent of any particular network protocol while enabling efficient support for them in general. The file structure is object-oriented; a file can be decomposed into constituent objects very simply, and the structure of the objects inferred directly from their type. This technically identical text is published as ISO/IEC 14496-12:2005 for MPEG-4, and as ISO/IEC 15444-12:2005 for JPEG 2000, and reference to this specification should be made accordingly. The recommendation is to reference one, for example ISO/IEC 14496-12:2005, and append to the reference a parenthetical comment identifying the other, for example "(technically identical to ISO/IEC 15444-12:2005)". This version adds various new tools, including those for content protection, better support of metadata, and better support for advanced coding.
Technologies de l'information — Codage des objets audiovisuels — Partie 12: Format ISO de base pour les fichiers médias
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Standards Content (Sample)
INTERNATIONAL ISO/IEC
STANDARD 14496-12
Second edition
2005-04-01
Corrected version
2005-10-01
Information technology — Coding of
audio-visual objects —
Part 12:
ISO base media file format
Technologies de l'information — Codage des objets audiovisuels —
Partie 12: Format ISO de base pour les fichiers médias
Reference number
ISO/IEC 14496-12:2005(E)
©
ISO/IEC 2005
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ISO/IEC 14496-12:2005(E)
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ISO/IEC 14496-12:2005(E)
Contents Page
Foreword. vi
Introduction . viii
1 Scope .1
2 Normative references .1
3 Definitions .1
4 Object-structured File Organization .3
4.1 File Structure.3
4.2 Object Structure.3
4.3 File Type Box.4
4.3.1 Definition .4
4.3.2 Syntax.5
4.3.3 Semantics.5
5 Design Considerations.5
5.1 Usage .5
5.1.1 Introduction.5
5.1.2 Interchange.5
5.1.3 Content Creation.6
5.1.4 Preparation for streaming.6
5.1.5 Local presentation.7
5.1.6 Streamed presentation.7
5.2 Design principles.7
6 ISO Base Media File organization .8
6.1 Presentation structure .8
6.1.1 File Structure.8
6.1.2 Object Structure.8
6.1.3 Meta Data and Media Data .8
6.1.4 Track Identifiers .8
6.2 Metadata Structure (Objects).9
6.2.1 Box .9
6.2.2 Data Types and fields.9
6.2.3 Box Order .10
7 Streaming Support.13
7.1 Handling of Streaming Protocols.13
7.2 Protocol ‘hint’ tracks .13
7.3 Hint Track Format .14
8 Box Definitions.14
8.1 Movie Box.14
8.2 Media Data Box .15
8.3 Movie Header Box.15
8.4 Track Box.16
8.5 Track Header Box .17
8.6 Track Reference Box .18
8.7 Media Box.19
8.8 Media Header Box.19
8.9 Handler Reference Box .20
8.10 Media Information Box .21
8.11 Media Information Header Boxes.21
8.11.2 Video Media Header Box.21
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ISO/IEC 14496-12:2005(E)
8.11.3 Sound Media Header Box. 22
8.11.4 Hint Media Header Box . 22
8.11.5 Null Media Header Box . 22
8.12 Data Information Box. 23
8.13 Data Reference Box . 23
8.14 Sample Table Box . 24
8.15 Time to Sample Boxes. 24
8.15.2 Decoding Time to Sample Box . 25
8.15.3 Composition Time to Sample Box. 26
8.16 Sample Description Box. 27
8.17 Sample Size Boxes . 29
8.17.2 Sample Size Box . 30
8.17.3 Compact Sample Size Box. 30
8.18 Sample To Chunk Box . 30
8.19 Chunk Offset Box. 31
8.20 Sync Sample Box . 32
8.21 Shadow Sync Sample Box . 32
8.22 Degradation Priority Box. 33
8.23 Padding Bits Box . 34
8.24 Free Space Box . 34
8.25 Edit Box. 35
8.26 Edit List Box . 35
8.27 User Data Box. 36
8.28 Copyright Box. 37
8.29 Movie Extends Box . 37
8.30 Movie Extends Header Box. 37
8.31 Track Extends Box. 38
8.32 Movie Fragment Box. 39
8.33 Movie Fragment Header Box. 39
8.34 Track Fragment Box . 40
8.35 Track Fragment Header Box . 40
8.36 Track Fragment Run Box . 41
8.37 Movie Fragment Random Access Box. 42
8.38 Track Fragment Random Access Box . 43
8.39 Movie Fragment Random Access Offset Box . 44
8.40 AVC Extensions . 44
8.40.2 Independent and Disposable Samples Box . 44
8.40.3 Sample Groups. 45
8.40.4 Random Access Recovery Points. 48
8.41 Sample Scale Box . 49
8.42 Sub-Sample Information Box. 50
8.43 Progressive Download Information Box. 51
8.44 Metadata Support. 52
8.44.1 The Metadata Box . 52
8.44.2 XML Boxes. 53
8.44.3 The Item Location Box. 53
8.44.4 Primary Item Box. 55
8.44.5 Item Protection Box . 55
8.44.6 Item Information Box . 56
8.44.7 URL Forms for meta boxes . 56
8.44.8 Static Metadata. 57
8.45 Support for Protected Streams. 58
8.45.1 Protection Scheme Information Box. 59
8.45.2 Original Format Box. 59
8.45.3 IPMPInfoBox . 60
8.45.4 IPMP Control Box. 60
8.45.5 Scheme Type Box . 61
8.45.6 Scheme Information Box. 62
9 Extensibility . 62
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ISO/IEC 14496-12:2005(E)
9.1 Objects.62
9.2 Storage formats .63
9.3 Derived File formats .63
10 RTP and SRTP Hint Track Format.63
10.1 Introduction.63
10.2 Sample Description Format.64
10.2.1 SRTP Process box ‘srpp‘:.65
10.3 Sample Format.66
10.3.1 Packet Entry format.66
10.3.2 Constructor format .67
10.4 SDP Information.68
10.4.1 Movie SDP information .68
10.4.2 Track SDP Information .68
10.5 Statistical Information .69
Annex A (informative) Overview and Introduction.70
A.1 Section Overview.70
A.2 Core Concepts .70
A.3 Physical structure of the media .70
A.4 Temporal structure of the media.71
A.5 Interleave .71
A.6 Composition.71
A.7 Random access.72
A.8 Fragmented movie files.72
Annex B (informative) Patent Statements.74
Annex C (informative) Guidelines on deriving from this specification.75
C.1 Introduction.75
C.2 General Principles .75
C.3 Brand Identifiers .75
C.3.1 Introduction.75
C.3.2 Usage of the Brand.75
C.3.3 Introduction of a new brand .76
C.3.4 Player Guideline.76
C.3.5 Example .76
C.4 Box layout and order.77
C.5 Storage of new media types .77
C.6 Use of Template fields.77
C.7 Construction of fragmented movies.77
Annex D (informative) Registration Authority .79
D.1 Code points to be registered .79
D.2 Procedure for the request of an MPEG-4 registered identifier value .79
D.3 Responsibilities of the Registration Authority .80
D.4 Contact information for the Registration Authority .80
D.5 Responsibilities of Parties Requesting a RID.80
D.6 Appeal Procedure for Denied Applications .81
D.7 Registration Application Form .81
D.7.1 Contact Information of organization requesting a RID.81
D.7.2 Request for a specific RID .81
D.7.3 Short description of RID that is in use and date system was implemented.82
D.7.4 Statement of an intention to apply the assigned RID .82
D.7.5 Date of intended implementation of the RID.82
D.7.6 Authorized representative .82
D.7.7 For official use of the Registration Authority .83
Bibliography .84
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ISO/IEC 14496-12:2005(E)
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.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO and IEC shall not be held responsible for identifying any or all such patent rights.
ISO/IEC 14496-12 was prepared by Joint Technical Committee ISO/IEC JTC 1, Information technology,
Subcommittee SC 29, Coding of audio, picture, multimedia and hypermedia information.
This second edition cancels and replaces the first edition (ISO/IEC 14496-12:2004) which has been
technically revised.
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
⎯ Part 11: Scene description and application engine
⎯ Part 12: ISO base media file format
⎯ Part 13: Intellectual Property Management and Protection (IPMP) extensions
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ISO/IEC 14496-12:2005(E)
⎯ Part 14: MP4 file format
⎯ Part 15: Advanced Video Coding (AVC) file format
⎯ Part 16: Animation Framework eXtension (AFX)
⎯ Part 17: Streaming text format
⎯ Part 18: Font compression and streaming
⎯ Part 19: Synthesized texture stream
⎯ Part 20: Lightweight Application Scene Representation (LASeR) and Simple Aggregation Format (SAF)
The following parts are under preparation:
⎯ Part 21: MPEG-J extensions for rendering
This corrected version of ISO/IEC 14496-12:2005 (E) incorporates the following correction:
⎯ In 8.16.2, 8.17.2.1, 8.17.3.1, 8.18.2 and 8.19.2, “•” has been replaced with “u”.
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ISO/IEC 14496-12:2005(E)
Introduction
The ISO Base Media File Format is designed to contain timed media information for a presentation in a
flexible, extensible format that facilitates in
...
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