If I'm being fair, audio encoders are more advanced than video encoders, and we can probably shave more off with psychoacoustics than we can with our current un

If I'm being fair, audio encoders are more advanced than video encoders, and we can probably shave more off with psychoacoustics than we can with our current understanding of psychovisuals. On the other end of the scale, video encoders have to process orders of magnitude more data, in more dimensions! For example, Opus's CELT encoder uses lapped transforms and keeps about the same level of constrained-energy. Combined with the (hybrid) voice codec in some very advanced ways, it makes for the most advanced audio codec around by quite some margin. You look at video, and nothing's that good yet, not even HEVC. The only thing that leaps to mind is Xiphophorus's Daala project - https://www.xiph.org/daala/ https://www.xiph.org/daala/ - which is hoping to do for video what Opus did for audio and develop a royalty-free, awesome video codec (rather than being donated a royalty-free, okay two or three) - and that's I'd say one or two generations ahead of HEVC, but of course, still very very early work.