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Common Media Application Format (CMAF) [36] combines and constrains several MPEG specifications to define a multimedia format optimized for delivery of a single adaptive multimedia presentation to a variety of devices, using various adaptive streaming formats, broadcast, download, and storage methods. The device MUST support this standard.

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List of allowed AAC profiles [36], section 10.3 AAC audio CMAF tracks

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CMAF defines the following formats for carrying subtitles and captions [36], section 11.1 Subtitles and captions overview:

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AVC video CMAF media profile shall comply to one of the media profiles in table above [36], annex A.2:

Media profile

Profile

Level

Colour primaries

Max frame height

Max frame width

Max frame rate

CMAF File Brand

SD

High

3.1

BT.709 BT.601-7

576

864

60

‘cfsd’

HD

High

4.0

BT.709

1080

1920

60

‘cfhd’

HDHF

High

4.2

BT.709

1080

1920

60

‘chdf’

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HEVC video CMAF media profile shall comply to one of the media profiles in table above [36], annex B.5:

Media profile

Profile

Level

Colour primaries

Max frame height

Max frame width

Max frame rate

CMAF File Brand

HHD8

Main MainTier

4.1

BT.709

1080

1920

60

‘chhd’

HHD10

Main10 MainTier

4.1

BT.709

1080

1920

60

‘chh1’

UHD8

Main MainTier

5.0

BT.709

2160

3840

60

‘cud8’

UHD10

Main10 MainTier 10-bit

5.1

BT.709 BT.2020

2160

3840

60

‘cud1’

HDR10

Main10 MainTier 10-bit

5.1

BT-2020

2160

3840

60

‘chd1’

HLG10

Main10 MainTier 10-bit

5.1

BT-2020

2160

3840

60

‘clg1’

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[35] Accessible Rich Internet Applications (WAI-ARIA) 1.1 - https://www.w3.org/TR/wai-aria/

Anchor
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[36] ISO/IEC 23000-19:2018 Information technology — Multimedia application format (MPEG-A) — Part 19: Common media application format (CMAF) for segmented media https://www.iso.org/standard/71975.html

6. ANNEX


6. ANNEX A (informative). Media type strings for video and audio codecs

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