That’s the thread I found along with this feature request: Support for streaming opus format?.
I also saw that ARC converts to Opus too which I found rather amusing. It seems like there are few users who actually have files in Opus. There are a few sites that provide them as an option which is why I have a few files but I finally got around to adding them to Roon. I was curious to see if the community used them much.
ffmpeg, as per usual, looks like the way to go. I’ll try it out later this weekend and see report back how it goes. Thanks for the input everyone.