JPEG XL: How it started, how it’s going
Question: why do we see stable video and audio "container formats" like MKV that persist as encodings come and go (where you might not be able to play a new .mkv file on an old player, but the expected answer to that is to upgrade your player to a new version, with universal support for pretty much any encoding being an inevitability on at least all software players); but every new image encoding seemingly necessitates its own new container format and file extension, and a minor format war to decide who will support it?Is this because almost all AV decoders use libffmpeg or a fork thereof; where libffmpeg is basically an "uber-library" that supports all interesting AV formats and codecs; and therefore you can expect ~everything to get support for a new codec whenever libffmpeg includes it (rather than some programs just never ending up supporting the codec)?If so — is there a reason that there isn't a libffmpeg-like uber-library for image formats+codecs?