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.