found some interrsting detailed inforamtion about the hardware transcoding on intel based synology boxes   "... DS214play and DS415play with Intel Evansport SoC are the only models supported. Serviio uses the multimedia tool FFmpeg for manipulating media files, and I am only able to build a hardware-assisted FFmpeg for DS214play and DS215play. Subsequent to those products, Synology has marketed a number of other systems with hardware transcoding features but these are not supported by Serviio