Lets read FFMPEG source code together!
https://zap.stream/naddr1qqjxyvpexdsk2vfk956nwctr956xzcty94snjwtr95cxywphxcengwtxxcux2q3qeaz6dwsnvwkha5sn5puwwyxjgy26uusundrm684lg3vw4ma5c2jsxpqqqpmxwpa8l26