Source of AVIF

TITLE:AV1 Still Image File Format (AVIF)
[[AOMedia]] > [[AV1]] > [[AVIF]]
#contents

* 公式 [#official]

- https://aomediacodec.github.io/av1-avif/
--  https://github.com/AOMediaCodec/av1-avif
--  https://github.com/AOMediaCodec/av1-avif/wiki

- https://github.com/AOMediaCodec/libavif

* 要素 [#element]

- [[AV1]] (動画エンコード。AVIF はこれの I フレームを用いる)
- [[ISOBMFF]]  (コンテナ形式。HEIF とほぼ殆ど同じ。av1C が異なる。HEIF は hvcC)
-- [[AV1/Config]] av1C

* 解説 [#commentary]

- AV1 Image File Format (AVIF)
--  https://people.xiph.org/~negge/AVIF2018.pdf

** 競合 [#rival]

*** HEIF [#heif]

- HEIFとAVIF：画像と写真のフォーマットと違い
-- https://itigic.com/ja/heif-and-avif-image-photography-formats-differences/

*** WebP [#webp]

- Comparing AVIF vs WebP file sizes at the same DSSIM
--  https://www.ctrl.blog/entry/webp-avif-comparison.html

* 表示 [#view]

- https://cconcolato.github.io/wasm-av1/

* テスト画像 [#testimage]

- AVIF test file collection 
--  https://github.com/AOMediaCodec/av1-avif/tree/master/testFiles
---   https://github.com/AOMediaCodec/av1-avif/tree/master/testFiles/Microsoft

-  Netflix - AV1 / Chimera / AVIF
--  http://download.opencontent.netflix.com/?prefix=AV1/Chimera/AVIF/

* ソフトウエア [#software]

** OS [#os]

*** Android [#android]

- Android 12 Will Support AVIF Photos
--  https://petapixel.com/2021/02/20/android-12-will-support-avif-photos/
---  https://android-developers.googleblog.com/2021/02/android-12-dp1.html

** ブラウザ [#browser]

- https://caniuse.com/avif

*** Chrome [#chrome]

- https://chromium-review.googlesource.com/c/chromium/src/+/2101317
>
Add support for decoding the AV1 image format (AVIF).

- https://developer.android.com/about/versions/12/features
>
Android 12 introduces support for images that use the AV1 Image File Format (AVIF).

*** Mozilla [#mozilla]

- https://bugzilla.mozilla.org/show_bug.cgi?id=1625363
>
AVIF (AV1 Image File Format): experimental support

*** Safari [#safari]

- https://trac.webkit.org/wiki/WebKitGoalsfor2020 (WebKit: no support for AV1 and AVIF seems planned any time soon)

**  ライブラリ [#library]

- [[libheif]]
- https://github.com/AOMediaCodec/libavif

- Port of the AV1 Video codec to WebAssembly
-- https://github.com/GoogleChromeLabs/wasm-av1

- https://www.microsoft.com/en-us/p/av1-video-extension-beta/9mvzqvxjbq9v?activetab=pivot:overviewtab

**  Rust [#rust]

- [[cavif]]

** JavaScript [#javascript]

-  AVIF polyfill for the browser 
--  https://github.com/Kagami/avif.js

** Golang [#golang]

- https://github.com/Kagami/go-avif

* その他  [#etc]

- AVIFを試す
--  https://wave.hatenablog.com/entry/2019/09/07/080800
>>
% ffmpeg -r 1 -i INFILE -c:v libaom-av1 -g 1 -frames 1 -crf CRFVALUE -b:v 0 -an -strict experimental -y OUTFILE.mp4
>>
% mp4box -add-image OUTFILE.mp4:time=0 -brand avif OUTFILE.avif

- Photo format from Google and Mozilla could leave JPEG in the dust
--  https://www.cnet.com/news/google-mozilla-av1-photo-format-could-outdo-aging-jpeg/

- 次世代動画コーデック「AV1」の圧縮技術を利用する次世代画像フォーマット「AVIF」
--  https://gigazine.net/news/20180411-avif-draft/

- AVIF for Next-Generation Image Coding
--  https://netflixtechblog.com/avif-for-next-generation-image-coding-b1d75675fe4

- http://www.dma.ufg.ac.at/assets/25279/vh1_S.pdf

- How to Use AVIF: The New Next-Gen Image Compression Format
--  https://reachlightspeed.com/blog/using-the-new-high-performance-avif-image-format-on-the-web-today/

- AVIF 入りの ImageMagick をビルドする
--  https://zenn.dev/tan_y/articles/a8891b9cd4ba0b

-  Cloudflare adding support for AVIF image format
-- https://www.reddit.com/r/AV1/comments/j4f2ea/cloudflare_adding_support_for_avif_image_format/

* 関連 [#rel]

- [[ISOBMFF]] - [[MiAF]]
- [[CMAF]]
- [[HEIF]]