AVIF（AV1 图像文件格式）
AVIF 是一种基于开源 AV1 视频编解码器的下一代图像格式。它提供卓越的压缩效率，在同等质量下通常比 JPEG 小 50%，比 WebP 小 20%。AVIF 支持 HDR、宽色域、透明度和动画。
MIME 类型
image/avif
类型
二进制
压缩
有损
优点
- + Best-in-class compression efficiency
- + Royalty-free and open-source codec
- + HDR and wide color gamut support
- + Growing browser support
缺点
- − Slower encoding than JPEG or WebP
- − Not yet universally supported
- − Limited tooling compared to established formats
何时使用 .AVIF
建议将 AVIF 作为网站的渐进增强方案，向支持的浏览器提供 AVIF，同时为其他浏览器回退到 WebP 或 JPEG。
技术细节
AVIF 采用 AV1 帧内编码，使用高级变换和预测模式。它支持 8、10 和 12 位色深、4:4:4 色度采样、HDR10 以及 PQ/HLG 传输函数。
历史
AVIF 由开放媒体联盟于 2019 年 2 月最终确定。Chrome 于 2020 年添加支持，Safari 于 2023 年跟进，完成了主流浏览器的全面覆盖。
从 .AVIF 转换
转换为 .AVIF
相关格式
相关术语
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