ISO/IEC 23008-12:2017

The formats defined in ISO/IEC 23008-12:2017 enable the interchange, editing, and display of images, as well as the carriage of metadata associated with those images.
The Image File Format builds on tools defined in ISO/IEC 14496-12 to define an interoperable storage format for a single image, a collection of images, and sequences of images.
ISO/IEC 23008-12:2017 specifies brands for the storage of images and image sequences conforming to High Efficiency Video Coding (HEVC).
NOTE       The storage of HEVC video sequences is out of scope and is handled by ISO/IEC 14496-15.
This format defines normative structures used to contain metadata, how to link that metadata to the images, and defines how metadata of certain forms is carried.