http://bugs.winehq.org/show_bug.cgi?id=58647
--- Comment #4 from mazuz.eyal@gmail.com --- (In reply to Rafał Mużyło from comment #2)
(In reply to Nikolay Sivov from comment #1)
The function itself is not missing. I suspect something is broken regarding delayload.
Not so much *broken*...
Unhandled exception: unimplemented function mfplat.dll.MFCreateVideoMediaType called in wow64 *32-bit* code (0x7b5e82e7).
A stab in the dark, but... I recall having an 'unimplemented function' error with an implemented function, when the program either ran oom or out of vm space. I'm not 100%sure, but I seem to recall it was a delayload too...
OP, attach full console output and check if you aren't running out of either of those while running the game.
I added the console output when running:
LC_ALL=ja_JP.UTF-8 TZ=Asia/Tokyo wine SiglusEngine.exe