dude, this is awe­some! i have exact­ly the same prob­lem, i want to stream direct­ly from my NAS..!

how i can enter your MIME types in a way my NAS + Bravia understands?

default (syn­ol­o­gy) Nas mime types are:
avi=video/x‑ms-video,wav=audio/x‑wav

and the NAS uses ffm­peg for transcod­ing and streaming