I think, I can confirm that both HW and SW transcoding are working on Asrock J5005 ITX.   Original Jun 1.04b loader (no custom extra.lzma) DSM 6.2-23739 (DS918+) Real SN from my Synology DS918+ & MAC (onboard flashed)       Need to check if Power Off / Reboot is working (as it did not at DSM 6.2.2-24922 Update 4)