I have my QNAP ts-251+ connected to my Nvidia Shield via ethernet which is then connected to my Samsung TV via hdmi. So far as transcoding is concerned, which of these two components performs the transcoding if needed? Does the Shield access the raw content on the NAS and then transcode or does the NAS transcode before supplying the Shield. My files are all 4k mkv or avi. Given the processing limitation of my NAS, is it better to have the Shield do the transcoding and if so how do I disable the NAS from doing this?