ISO/IEC 23000-19:2024
(Main)Information technology — Multimedia application format (MPEG-A) — Part 19: Common media application format (CMAF) for segmented media
Information technology — Multimedia application format (MPEG-A) — Part 19: Common media application format (CMAF) for segmented media
This document specifies the CMAF multimedia format, which contains segmented media objects optimized for streaming delivery and decoding on end user devices in adaptive multimedia presentations. CMAF specifies a track format derived from the ISO base media file format, then derives addressable media objects from CMAF tracks that can be used for storage and delivery. CMAF specifies sets of tracks that share encoding and packaging constraints that enable the selection of multiple tracks to form a multimedia presentation and allow seamless switching of alternative encodings of the same content at different bit rates, frame rates, resolution, etc. CMAF specifies a hypothetical application model that determines how tracks in a CMAF presentation are intended to be combined and synchronized to form a multimedia presentation. The model abstracts delivery to allow any delivery method. The hypothetical application model assumes a manifest and player, but CMAF does not specify a manifest, player, or delivery protocol, with the intent that any that support the hypothetical application model can be used. CMAF specifies media profiles and brands that constrain media encoding and packaging of CMAF tracks to enable seamless adaptive switching of tracks and allow devices to identify compatible content by its brand. CMAF specifies presentation profiles that conditionally require sets of CMAF tracks conforming to specified media profiles and allow content creators and devices to identify compatible multimedia presentations. CMAF enables extensibility by specifying how new media profiles and presentation profiles can be specified and identified and includes guidelines for those specifications.
Technologies de l'information — Format pour application multimédia (MPEG-A) — Partie 19: Format CMAF (Common Media Application Format) pour médias segmentés
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ISO/IEC 23000-19
Third edition
Information technology —
2024-02
Multimedia application format
(MPEG-A) —
Part 19:
Common media application format
(CMAF) for segmented media
Technologies de l'information — Format pour application
multimédia (MPEG-A) —
Partie 19: Format CMAF (Common Media Application Format)
pour médias segmentés
Reference number
ISO/IEC 23000-19:2024(en) © ISO/IEC 2024
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ISO/IEC 23000-19:2024(en)
COPYRIGHT PROTECTED DOCUMENT
© ISO/IEC 2024
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
© ISO/IEC 2024 – All rights reserved
ii
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ISO/IEC 23000-19:2024(en)
Contents Page
Foreword .vii
Introduction .viii
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 3
3.1 Media objects .3
3.2 Logical structure .3
3.3 Application model .5
4 Abbreviated terms . 6
5 Document organization . 9
6 CMAF hypothetical application model, media object model and profiles . 9
6.1 Overview of the hypothetical application model and media object model.9
6.2 CMAF content processing model .10
6.3 Late binding CMAF track synchronization .11
6.4 Adaptive switching of CMAF tracks in CMAF switching sets . 12
6.5 CMAF specified objects and profiles . 13
6.5.1 Object derivation and interoperability code points . 13
6.5.2 Encoded media objects . 13
6.5.3 Logical media object sets .
...
FINAL
INTERNATIONAL ISO/IEC
DRAFT
STANDARD FDIS
23000-19
ISO/IEC JTC 1/SC 29
Information technology — Multimedia
Secretariat: JISC
application format (MPEG-A) —
Voting begins on:
2023-11-29
Part 19:
Voting terminates on:
Common media application format
2024-01-24
(CMAF) for segmented media
Technologies de l'information — Format pour application multimédia
(MPEG-A) —
Partie 19: Format CMAF (Common Media Application Format) pour
médias segmentés
RECIPIENTS OF THIS DRAFT ARE INVITED TO
SUBMIT, WITH THEIR COMMENTS, NOTIFICATION
OF ANY RELEVANT PATENT RIGHTS OF WHICH
THEY ARE AWARE AND TO PROVIDE SUPPOR TING
DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
Reference number
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
ISO/IEC FDIS 23000-19:2023(E)
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
OCCASION HAVE TO BE CONSIDERED IN THE
LIGHT OF THEIR POTENTIAL TO BECOME STAN-
DARDS TO WHICH REFERENCE MAY BE MADE IN
NATIONAL REGULATIONS. © ISO/IEC 2023
---------------------- Page: 1 ----------------------
ISO/IEC FDIS 23000-19:2023(E)
FINAL
INTERNATIONAL ISO/IEC
DRAFT
STANDARD FDIS
23000-19
ISO/IEC JTC 1/SC 29
Information technology — Multimedia
Secretariat: JISC
application format (MPEG-A) —
Voting begins on:
Part 19:
Voting terminates on:
Common media application format
(CMAF) for segmented media
Technologies de l'information — Format pour application multimédia
(MPEG-A) —
Partie 19: Format CMAF (Common Media Application Format) pour
médias segmentés
COPYRIGHT PROTECTED DOCUMENT
© ISO/IEC 2023
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
RECIPIENTS OF THIS DRAFT ARE INVITED TO
ISO copyright office
SUBMIT, WITH THEIR COMMENTS, NOTIFICATION
OF ANY RELEVANT PATENT RIGHTS OF WHICH
CP 401 • Ch. de Blandonnet 8
THEY ARE AWARE AND TO PROVIDE SUPPOR TING
CH-1214 Vernier, Geneva
DOCUMENTATION.
Phone: +41 22 749 01 11
IN ADDITION TO THEIR EVALUATION AS
Reference number
Email: copyright@iso.org
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO
ISO/IEC FDIS 2300019:2023(E)
Website: www.iso.org
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
Published in Switzerland
OCCASION HAVE TO BE CONSIDERED IN THE
LIGHT OF THEIR POTENTIAL TO BECOME STAN
DARDS TO WHICH REFERENCE MAY BE MADE IN
ii
© ISO/IEC 2023 – All rights reserved
NATIONAL REGULATIONS. © ISO/IEC 2023
---------------------- Page: 2 ----------------------
ISO/IEC FDIS 23000-19:2023(E)
Contents Page
Foreword .vii
Introduction .viii
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 3
3.1 Media objects . 3
3.2 Logical structure . 4
3.3 Application model . 5
4 Abbreviated terms . 6
5 Document Organization .
...
ISO/IEC FDIS 23000-19:2023JTC 1/SC 29/WG 03 N1080
ISO/IEC JTC 1/SC 29/WG 03
MPEG Systems
Convenorship: KATS (Korea, Republic of)
Document type: Output Document
Title: Revised text of ISO/IEC FDIS 23000-19 3rd edition Common media
application format (CMAF) for segmented media
Status: Approved
Date of document: 2023-11-14
Source: ISO/IEC JTC 1/SC 29/WG 03
No. of pages: 195 (with cover page)
Email of Convenor: young.L @ samsung . com
Committee URL: https://isotc.iso.org/livelink/livelink/open/jtc1sc29wg3
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ISO/IEC 23000-19:2022(E)
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION
ORGANISATION INTERNATIONALE DE NORMALISATION
ISO/IEC JTC 1/SC 29/WG 03 MPEG SYSTEMS
ISO/IEC JTC 1/SC 29/WG 03 N1080
April 2022, Virtual
Title Revised text of ISO/IEC FDIS 23000-19 3rd edition Common media
application format (CMAF) for segmented media
Source WG 03, MPEG Systems
Status Approved
Serial Number 23260
© ISO/IEC 2022 – All rights reserved
ii
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ISO/IEC 23000-19:2022(E)
ISO/IEC JTC 1/SC 29/WG 11
Secretariat: JISC
Date: 2023-09-Draft: 20
Information technology — Multimedia application format (MPEG-A) — Part 19: Common
media application format (CMAF) for segmented media
Technologies de l'information — Codage des objets audiovisuels
© ISO/IEC 2022 – All rights reserved
iii
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ISO/IEC FDIS 23000-19:20232022(E)
© ISO 2023
All rights reserved. Unless otherwise specified, or required in the context of its
implementation, no part of this publication may be reproduced or utilized otherwise in any
form or by any means, electronic or mechanical, including photocopying, or posting on the
internet or an intranet, without prior written permission. Permission can be requested from
either ISO at the address below or ISO's member body in the country of the requester.
ISO Copyright Office
CP 401 • CH-1214 Vernier, Geneva
Phone: + 41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland.
© ISO/IEC 2023 2022 – All rights reserved
iviv
---------------------- Page: 4 ----------------------
ISO/IEC FDIS 23000-19:20232022(E)
Contents
3.1 Media objects . 3
3.2 Logical structure . 4
3.3 Application model. 6
6.1 Overview of the hypothetical application model and media object model . 10
6.2 CMAF content processing model . 13
6.3 Late binding CMAF track synchronization . 15
6.4 Adaptive switching of CMAF tracks in CMAF switching sets . 16
6.5 CMAF specified objects and profiles . 16
6.5.1 Object derivation and interoperability code points . 16
6.5.2 Encoded media objects . 17
6.5.3 Logical media object sets . 17
6.5.4 Addressable media objects . 17
6.5.5 CMAF profiles, brand and identifiers . 17
6.6 CMAF media object model . 19
6.6.1 CMAF fragments .19
6.6.2 CMAF tracks .20
6.6.3 CMAF track files .20
6.6.4 CMAF segments.2
...
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