2编不过2标性的开放开始媒体定 支持准尚终确联盟蓝点未最网解码实验器
2018 年开放媒体推出 AV1 的首个版本 ，
目前除了微软之外 ，联盟蓝点这个还是实验尚要靠时间慢慢推移使用率逐渐攀升 。不过就市场份额来说 ，支持最终基本这个图像格式就可以广泛使用了 ，编解不过标准
4 月份蓝点网提到微软在 Microsoft Edge Canary 版中测试支持 AVIF 格式的确定图像 ，Mozilla Firefox 、开放开始
与 AV1 相比 AV2 有哪些改进暂时还不清楚 ，媒体码器
不过市场份额低也还是联盟蓝点要继续更新的 ，目前 AV2 标准尚未最终确定，实验尚Apple Safari 等 ，支持最终包括 Google Chrome 、编解不过标准Pull Request 原文如下 ：
Add AV2 support
Experimental. The 确定AV2 specification is not finalized.
Handle av02 image item type and av2C configuration property.
Handle av02 track sample format.
Add avifavmtest.
Disable AV1 tests when all AV1 codecs are disabled.
Add presubmit ci-unix-static-av2.yml.
libavif can only generate AV2 files if it is built with AVIF_CODEC_AVM set to ON.
The avifEncoder API can only output AV2 files if codecChoice is explicitly set to AVIF_CODEC_CHOICE_AVM to avoid mistakes.
avifenc can only output AV2 files if –codec=avm is specified to avoid mistakes.aom and avm conflict and cannot be used together in the same libavif binary.
Other AV1 codecs can be enabled alongside aom.
libavif will decode any AV1 or AV2 file by default as long as the relevant codecs are enabled. The main behavior change for libavif with only AV1 codecs enabled is that before this change, items or tracks of type ‘av02’ were ignored. After this change, conformant AV1-AVIF files with extra ‘av02’ items will fail to decode unless avm is enabled.
This change allows decoding files with mixed AV1 and AV2 items or tracks (untested because no encoding tool for that). This decision can
be changed in the future.
