/usr/share/kservices5/ is in libk3b7-extracodecs 17.12.3-0ubuntu3.
This file is owned by root:root, with mode 0o755.
..
/usr/share/kservices5/k3bexternalencoder.desktop
/usr/share/kservices5/k3bffmpegdecoder.desktop
/usr/share/kservices5/k3bflacdecoder.desktop
/usr/share/kservices5/k3blameencoder.desktop
/usr/share/kservices5/k3blibsndfiledecoder.desktop
/usr/share/kservices5/k3bmaddecoder.desktop
/usr/share/kservices5/k3bmpcdecoder.desktop
/usr/share/kservices5/k3boggvorbisdecoder.desktop
/usr/share/kservices5/k3boggvorbisencoder.desktop
/usr/share/kservices5/k3bsoxencoder.desktop
/usr/share/kservices5/k3bwavedecoder.desktop
/usr/share/kservices5/kcm_k3bexternalencoder.desktop
/usr/share/kservices5/kcm_k3blameencoder.desktop
/usr/share/kservices5/kcm_k3boggvorbisencoder.desktop
/usr/share/kservices5/kcm_k3bsoxencoder.desktop
/usr/share/kservices5/videodvd.protocol