There is a report in the doom9 forum that multiplexing HEVC with L-SMASH's muxer.exe fails since v2.7+14 to v2.7+17; there was a SEI clean-up in between. https://forum.doom9.org/showthread.php?p=1837506#post1837506 -- Fun and success! Mario *LigH* Rohkrämer mailto:contact at ligh.de