https://blog.wongcw.com/2022/05/14/ffmpeg%e5%90%88%e4%bd%b5%e5%9f%ba%e6%96%bcav1%e5%9c%96%e5%83%8f%e6%a0%bc%e5%bc%8f%e7%9a%84avif%e5%a4%9a%e8%b7%af%e5%be%a9%e7%94%a8%e5%99%a8/