Surprised I didn't see any DLNA servers with transcoding capabilities. I'm well aware that MiniDLNA (not transcoding) is already available as a built-in (8.0.3) and I think it should remain that way, it just needs to be integrated into the GUI which I highly recommend vice making it a separate plug-in. If managing it would be easier as a plug-in them by all means make it a plug-in.
But MiniDLNA doesn't do transcoding and a few other servers out there do. I'm not favoring any of them as I don't know which is better or what issues each have but here the ones I know of... Serviio, MediaTomb, and Fuppies. I've never been a fan of Fuppies in the past but that was a long time ago.
These transcoding applications will of coarse take CPU power so it's not for everyone but for those who want a media serving machine, this is a key component.