From d606203eeb399b11958cb2467b2ce269e98974a5 Mon Sep 17 00:00:00 2001 From: Yannis Date: Mon, 5 Jan 2026 11:14:33 +0100 Subject: [PATCH] Begin new Working Group Draft version 1.2.1 --- index.bs | 48 ++++++------------------------------------------ 1 file changed, 6 insertions(+), 42 deletions(-) diff --git a/index.bs b/index.bs index ac69b28..b8b993a 100755 --- a/index.bs +++ b/index.bs @@ -1,9 +1,9 @@ 
 Group: AOM
-Status: FD
-Text Macro: SPECVERSION v1.2.0
+Status: WGD
+Text Macro: SPECVERSION v1.2.1
 Title: AV1 Image File Format (AVIF)
-URL: https://aomediacodec.github.io/av1-avif/v1.2.0.html
+URL: https://aomediacodec.github.io/av1-avif
 Shortname: av1-avif
 Editor: Yannis Guyon, Google, yguyon@google.com
 Editor: Leo Barnes, Apple, lbarnes@apple.com
@@ -12,12 +12,12 @@ Former Editor: Cyril Concolato, Netflix, cconcolato@netflix.com
 Former Editor: Paul Kerr, Netflix, pkerr@netflix.com
 Former Editor: Anders Klemets, Microsoft, Anders.Klemets@microsoft.com
 Abstract: This document specifies syntax and semantics for the storage of [[!AV1]] images in the generic image file format [[!HEIF]], which is based on [[!ISOBMFF]]. While [[!HEIF]] defines general requirements, this document also specifies additional constraints to ensure higher interoperability between writers and readers when [[!HEIF]] is used with [[!AV1]] images. These constraints are based on constraints defined in the Multi-Image Application Format [[!MIAF]] and are grouped into profiles inspired by the profiles defined in [[!MIAF]].
-Date: 2025-10-16
+Date: 2026-01-05
 Repository: AOMediaCodec/av1-avif
 Text Macro: ADDITIONALLOGO https://aomedia.org/assets/images/avif-logo-rgb.svg
 !Latest approved version: https://aomediacodec.github.io/av1-avif/latest-approved.html
 !Latest version (published or draft): https://aomediacodec.github.io/av1-avif/index.html
-!Previously approved version: https://aomediacodec.github.io/av1-avif/v1.1.0.html
+!Previously approved version: https://aomediacodec.github.io/av1-avif/v1.2.0.html
 Metadata Order: This version, !*, *
@@ -1295,43 +1295,7 @@ The "Version(s)" column in the following table lists the version(s) of the boxes

The media type "image/avif" is officially registered with IANA and available at: https://www.iana.org/assignments/media-types/image/avif.

-

Changes since v1.1.0 release

- - EDITORIAL: Stop using `dfn value` for definitions. - - EDITORIAL: Add assert-ids in the spec for conformance file testing and ComplianceWarden - - Add required list of boxes for AVIF files - - EDITORIAL: Add "per item" to item property definitions - - EDITORIAL: Fix broken link for latest-draft.html - - Relax constraint on transformative properties in derivation chains to only apply to grid items - - Change ispe width to correspond to UpscaledWidth - - Clarify relationship between av1C, metadata OBUs and item properties - - EDITORIAL: Update list of other item properties - - Further clarify relationship between av1C, metadata OBUs and item properties - - Add information on tmap, grpl and altr - - Replace recommendations regarding still picture flags in image items by a note - - Add section 4.2.2 "Sample Transform Derived Image Item" - - Add Appendix A "Sample Transform Derived Image Item Examples" - - Add restriction on usage of clap property - - Adopt MIAF shared constraints - - EDITORIAL: Clean up usage of dfn and linking - - Clarify required versions of non-essential item properties - - EDITORIAL: Add refs, fix wording and format in clauses 1,2 - - EDITORIAL: Add sato, alpha, depth, progressive in Scope - - Clean up linking to base specs and duplicated information - - EDITORIAL: Use Markdown syntax coloring for code snippets - - EDITORIAL: Consistently use dfn noexport for derived items - - EDITORIAL: Remove Sample Transform sections from TOC - - EDITORIAL: Add references in the Sample Transform sections - - EDITORIAL: Indent notes as the list items they refer to - - EDITORIAL: Remove inconsistent dots in 9.1.2 - - Change structure of optional table of boxes - - Add hidden image item recommendation - - Remove mentions of ftyp compatible_brands - - Remove avio brand recommendation - - EDITORIAL: Fix broken lines in Sample Transform examples - - EDITORIAL: Make assert IDs between profiles unique - - Update the HEIF, ISOBMFF, and MIAF references to the latest versions - - EDITORIAL: Merge asserts for avio brand - - EDITORIAL: Clarify sato item requirements +

Changes since v1.2.0 release

Appendix A: (informative) Sample Transform Derived Image Item Examples