Sync my Windows app to see some offline mp4 on my vacation. Ended up with this error. Found the folder where the synced mp4 files were and played them with VLC. Nothing wrong with the files but the player didn't work?
I have the same situation and have not yet found an answer.
Is the full error you are getting... "MF_MEDIA_ENGINE_ERR_SRC_NOT_SUPPORTED: HRESULT - 0xC00D36B2." if so, take a look at -> https://forums.plex.tv/discussion/276597/plex-app-windows-10-mf-media-engine-err-src-not-spported#latest