Hey @Graham_Ball – just wanted to let you know we’re looking into this. The issue is related to how the newest version of Roon handles older versions of ffmpeg, and we are working on a fix that will address this problem.
For the moment, I don’t have a firm timeframe on when that fix will go live, but we’re working to ship it as soon as possible. In the meantime, I’d recommend trying to update ffmpeg on the QNAP if possible (any ideas @crieke?), or running your Core somewhere else temporarily.
Our apologies for the trouble here. @noris or I will be in touch soon.