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Update list of other item properties
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leo-barnes committed Sep 12, 2024
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Original file line number Diff line number Diff line change
Expand Up @@ -77,6 +77,17 @@ url: https://www.iso.org/standard/66067.html; spec: HEIF; type: property;
text: pixi
text: ispe
text: lsel
text: irot
text: imir
text: clap
text: cclv
text: clli
text: mdcv
text: reve
text: amve
text: ndwt
text: cmin
text: cmex
text: layer_id
text: image_width
text: image_height
Expand All @@ -88,10 +99,6 @@ url: https://www.iso.org/standard/68960.html; spec: ISOBMFF; type: dfn;

url: https://www.iso.org/standard/68960.html; spec: ISOBMFF; type: property;
text: sync
text: cclv
text: clli
text: mdcv
text: clap
text: iloc
text: mdat
text: idat
Expand Down Expand Up @@ -209,7 +216,20 @@ NOTE: The values of [=render_width_minus1=] and [=render_height_minus1=] possibl

<h4 id="other-item-property">Other Item Properties</h4>

In addition to the Image Properties defined in [[!HEIF]], such as 'colr', 'pixi' or 'pasp', [=AV1 image items=] MAY also be associated with 'clli', 'cclv' and 'mdcv' introduced in [[!MIAF]].
In addition to the Image Properties defined in this document, [=AV1 image items=] MAY also be associated with item properties defined in other specifications such as [[!HEIF]] and [[!MIAF]]. Examples of commonly used item properties are:
- 'colr'
- 'pixi'
- 'pasp'
- 'irot'
- 'imir'
- 'clli'
- 'cclv'
- 'mdcv'
- 'amve'
- 'reve'
- 'ndwt'
- 'cmin'
- 'cmex'

In general, it is recommended to use properties instead of [=Metadata OBUs=] in the [=AV1ItemConfigurationProperty=].

Expand Down Expand Up @@ -803,3 +823,4 @@ Other versions of the boxes shall not be used. "-" means that the box does not h
- <a href="https://github.com/AOMediaCodec/av1-avif/pull/227">Relax constraint on transformative properties in derivation chains to only apply to grid items</a>
- <a href="https://github.com/AOMediaCodec/av1-avif/pull/238">Change ispe width to correspond to UpscaledWidth</a>
- <a href="https://github.com/AOMediaCodec/av1-avif/pull/234">Clarify relationship between av1C, metadata OBUs and item properties</a>
- EDITORIAL: <a href="https://github.com/AOMediaCodec/av1-avif/pull/233">Update list of other item properties</a>

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