I had this working perfectly 2 weeks ago, after a fresh OS (Ubuntu 16.04) and Kodi (17b6 & 18b1) install.
I deliberately did not do any updates during that period, but the problem came back.
So I did another fresh 16.04 install using( http://forum.kodi.tv/showthread.php?tid=231955) and Kodi 17b7 install, added the 4K folder as a SMB share, placed a 2K video (Bad Santa) in with the 4K’s, and still have the same problem.
None of the 4K videos will play anymore, but the 2K plays fine.
I do not expect much help…but before I purge Kodi again, maybe someone will spot something in the logs.
mesa – http://paste.ubuntu.com/23665969/
kodi.log – http://paste.ubuntu.com/23665985/
dmesg – http://paste.ubuntu.com/23665986/
id – uid=1000(rrf) gid=1000(rrf) groups=1000(rrf),4(adm),24(cdrom),27(sudo),30(dip),46(plugdev),110(lxd),114(sambashare),119(lpadmin)
DISPLAY=:0 vainfo | pastebinit
libva info: VA-API version 0.39.2
libva info: va_getDriverName() returns -1
libva error: va_getDriverName() failed with unknown libva error,driver_name=(null)
vaInitialize failed with error code -1 (unknown libva error),exit