This document describes how to use ISO-BMFF structures to generate a HEIF/MIAF compatible file that contains one or more still images encoded using AV1.

The specification is written using a special syntax (mixing markup and markdown) to enable generation of cross-references, syntax highlighting, ... The file using this syntax is index.bs.

index.bs is processed to produce an HTML version (index.html) by a tool called Bikeshed (https://github.com/tabatkins/bikeshed), which is run when content is pushed onto the master branch or when Pull Requests are made.