Reference number
ISO/IEC 14496-12:2008(E)
©
ISO/IEC 2008
INTERNATIONAL
STANDARD
ISO/IEC
14496-12
Third edition
2008-10-15
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
ISO/IEC 14496-12:2008(E)
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© ISO/IEC 2008 – All rights reserved
ISO/IEC 14496-12:2008(E)
© ISO/IEC 2008 – All rights reserved iii
Contents Page
Foreword ...........................................................................................................................................................vii
Introduction........................................................................................................................................................ix
1 Scope ......................................................................................................................................................1
2 Normative references............................................................................................................................1
3 Definitions ..............................................................................................................................................2
3.1 Terms and definitions ...........................................................................................................................2
3.2 Abbreviated terms .................................................................................................................................3
4 Object-structured File Organization ....................................................................................................3
4.1 File Structure .........................................................................................................................................3
4.2 Object Structure ....................................................................................................................................3
4.3 File Type Box .........................................................................................................................................4
5 Design Considerations .........................................................................................................................5
5.1 Usage ......................................................................................................................................................5
5.1.1 Introduction............................................................................................................................................5
5.1.2 Interchange ............................................................................................................................................6
5.1.3 Content Creation ...................................................................................................................................6
5.1.4 Preparation for streaming ....................................................................................................................7
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
6.3 Brand Identification.............................................................................................................................12
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 Structures.....................................................................................................................................14
8.1 File Structure and general boxes.......................................................................................................14
8.1.1 Media Data Box....................................................................................................................................14
8.1.2 Free Space Box....................................................................................................................................15
8.1.3 Progressive Download Information Box ...........................................................................................15
8.2 Movie Structure ...................................................................................................................................16
8.2.1 Movie Box.............................................................................................................................................16
8.2.2 Movie Header Box ...............................................................................................................................16
8.3 Track Structure ....................................................................................................................................17
8.3.1 Track Box .............................................................................................................................................17
8.3.2 Track Header Box ................................................................................................................................18
8.3.3 Track Reference Box...........................................................................................................................20
8.4 Track Media Structure.........................................................................................................................20
8.4.1 Media Box.............................................................................................................................................20
8.4.2 Media Header Box ...............................................................................................................................21
ISO/IEC 14496-12:2008(E)
iv © ISO/IEC 2008 – All rights reserved
8.4.3
Handler Reference Box .......................................................................................................................22
8.4.4 Media Information Box ........................................................................................................................22
8.4.5 Media Information Header Boxes.......................................................................................................23
8.5 Sample Tables......................................................................................................................................24
8.5.1 Sample Table Box................................................................................................................................24
8.5.2 Sample Description Box .....................................................................................................................25
8.5.3 Degradation Priority Box ....................................................................................................................29
8.5.4 Sample Scale Box ................................................................................................................................30
8.6 Track Time Structures .........................................................................................................................31
8.6.1 Time to Sample Boxes ........................................................................................................................31
8.6.2 Sync Sample Box.................................................................................................................................34
8.6.3 Shadow Sync Sample Box..................................................................................................................34
8.6.4 Independent and Disposable Samples Box ......................................................................................35
8.6.5 Edit Box ................................................................................................................................................36
8.6.6 Edit List Box .........................................................................................................................................37
8.7 Track Data Layout Structures.............................................................................................................38
8.7.1 Data Information Box ..........................................................................................................................38
8.7.2 Data Reference Box .............................................................................................................................38
8.7.3 Sample Size Boxes ..............................................................................................................................39
8.7.4 Sample To Chunk Box.........................................................................................................................40
8.7.5 Chunk Offset Box.................................................................................................................................41
8.7.6 Padding Bits Box .................................................................................................................................42
8.7.7 Sub-Sample Information Box .............................................................................................................42
8.8 Movie Fragments .................................................................................................................................43
8.8.1 Movie Extends Box..............................................................................................................................43
8.8.2 Movie Extends Header Box.................................................................................................................44
8.8.3 Track Extends Box...............................................................................................................................44
8.8.4 Movie Fragment Box ...........................................................................................................................45
8.8.5 Movie Fragment Header Box ..............................................................................................................45
8.8.6 Track Fragment Box ............................................................................................................................46
8.8.7 Track Fragment Header Box...............................................................................................................46
8.8.8 Track Fragment Run Box ....................................................................................................................47
8.8.9 Movie Fragment Random Access Box ..............................................................................................48
8.8.10 Track Fragment Random Access Box ...............................................................................................49
8.8.11 Movie Fragment Random Access Offset Box...................................................................................50
8.9 Sample Group Structures ...................................................................................................................50
8.9.1 Introduction ..........................................................................................................................................50
8.9.2 Sample to Group Box ..........................................................................................................................50
8.9.3 Sample Group Description Box..........................................................................................................51
8.9.4 Representation of group structures in Movie Fragments ...............................................................53
8.10 User Data ..............................................................................................................................................53
8.10.1 User Data Box ......................................................................................................................................53
8.10.2 Copyright Box ......................................................................................................................................54
8.10.3 Track Selection Box ............................................................................................................................54
8.11 Metadata Support.................................................................................................................................56
8.11.1 The Meta box ........................................................................................................................................56
8.11.2 XML Boxes............................................................................................................................................57
8.11.3 The Item Location Box ........................................................................................................................57
8.11.4 Primary Item Box .................................................................................................................................58
8.11.5 Item Protection Box .............................................................................................................................59
8.11.6 Item Information Box ...........................................................................................................................59
8.11.7 Additional Metadata Container Box ...................................................................................................61
8.11.8 Metabox Relation Box .........................................................................................................................61
8.11.9 URL Forms for meta boxes.................................................................................................................62
8.11.10 Static Metadata.....................................................................................................................................63
8.12 Support for Protected Streams ..........................................................................................................63
8.12.1 Protection Scheme Information Box..................................................................................................64
8.12.2 Original Format Box ............................................................................................................................65
8.12.3 IPMPInfoBox.........................................................................................................................................65
8.12.4 IPMP Control Box.................................................................................................................................66
ISO/IEC 14496-12:2008(E)
© ISO/IEC 2008 – All rights reserved v
8.12.5
Scheme Type Box................................................................................................................................67
8.12.6 Scheme Information Box ....................................................................................................................67
8.13 File Delivery Format Support .............................................................................................................67
8.13.1 Introduction..........................................................................................................................................67
8.13.2 FD Item Information Box.....................................................................................................................68
8.13.3 File Partition Box .................................................................................................................................68
8.13.4 FEC Reservoir Box ..............................................................................................................................70
8.13.5 FD Session Group Box .......................................................................................................................70
8.13.6 Group ID to Name Box ........................................................................................................................71
9 Hint Track Formats..............................................................................................................................72
9.1 RTP and SRTP Hint Track Format .....................................................................................................72
9.1.1 Introduction..........................................................................................................................................72
9.1.2 Sample Description Format................................................................................................................72
9.1.3 Sample Format.....................................................................................................................................74
9.1.4 SDP Information ..................................................................................................................................77
9.1.5 Statistical Information.........................................................................................................................77
9.2 ALC/LCT and FLUTE Hint Track Format ...........................................................................................78
9.2.1 Introduction..........................................................................................................................................78
9.2.2 Design principles.................................................................................................................................79
9.2.3 Sample Description Format................................................................................................................80
9.2.4 Sample Format.....................................................................................................................................81
10 Sample Groups ....................................................................................................................................83
10.1 Random Access Recovery Points .....................................................................................................83
10.2 Rate Share Groups ..............................................................................................................................84
10.2.1 Introduction..........................................................................................................................................84
10.2.2 Rate Share Sample Group Entry........................................................................................................85
10.2.3 Relationship between tracks ..............................................................................................................86
10.2.4 Bitrate allocation .................................................................................................................................87
11 Extensibility .........................................................................................................................................87
11.1 Objects .................................................................................................................................................87
11.2 Storage formats ...................................................................................................................................88
11.3 Derived File formats ............................................................................................................................88
Annex A (informative) Overview and Introduction ........................................................................................89
A.1 Section Overview.................................................................................................................................89
A.2 Core Concepts .....................................................................................................................................89
A.3 Physical structure of the media .........................................................................................................89
A.4 Temporal structure of the media .......................................................................................................90
A.5 Interleave ..............................................................................................................................................90
A.6 Composition.........................................................................................................................................90
A.7 Random access ...................................................................................................................................91
A.8 Fragmented movie files ......................................................................................................................91
Annex B (informative) Patent Statements ......................................................................................................93
Annex C (informative) Guidelines on deriving from this specification .......................................................94
C.1 Introduction..........................................................................................................................................94
C.2 General Principles ...............................................................................................................................94
C.3 Brand Identifiers ..................................................................................................................................94
C.3.1 Introduction..........................................................................................................................................94
C.3.2 Usage of the Brand..............................................................................................................................94
C.3.3 Introduction of a new brand ...............................................................................................................95
C.3.4 Player Guideline ..................................................................................................................................95
C.3.5 Authoring Guideline ............................................................................................................................95
C.3.6 Example ................................................................................................................................................95
C.4 Box layout and order...........................................................................................................................96
C.5 Storage of new media types...............................................................................................................96
C.6 Use of Template fields ........................................................................................................................96
C.7 Construction of fragmented movies..................................................................................................97
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