Thanks! Fraunhofer HHI has already released vvenc ages ago: https://github.com/fraunhoferhhi/vvenc and it's _really_ good on compression performance as well as speed. The difference is that we used our own HEVC encoder as the base whereas Fraunhofer (and most likely x265 team) use the reference encoder VTM: https://vcgit.hhi.fraunhofer.de/jvet/VVCSoftware_VTM giving them all the tools from the beginning. We are aware of the problems with HEVC and VVC, and it's sad to find out that the VVC licensing terms are even worse for open-source...