Or it really named so!

https://github.com/mpeg5

Seems to be Samsung open-source project... (attempt at making alternative to vp9 / av1) 

includes  fork of ffmpeg with wrappers around two libs.. 

new patchwork series aiming at ffmpeg mainline

https://patchwork.ffmpeg.org/project/ffmpeg/list/?series=6454

doom9 discussion

https://forum.doom9.org/showthread.php?t=176055

oh, something to read.. 

PS: interesting for me reading on how this Dolby digital sound worked on real film 
https://everydaything.substack.com/p/35mm-cinema-film-and-digital-audio?s=r