Error - MinimStreamer: transcode setting '*:L16' requires a converter

[RobA]

I have always updated QTS to the most recent version every time an update is released. As far as I'm aware there were no updates overnight though perhaps other changes were initiated when the NAS was turned on again in the morning ( I turn the NAS off automatically over night and it reboots each morning).
I'm not sure where MinimServer/Streamer was "seeing" the ffmpeg files previously. One of life's little inscrutable mysteries!

Anyway all working OK now.