On this thread it states “If you can send h265 video with supported audio your player will happily (direct)play it, but if Plex has to transcode the audio, and the streaming container doesn’t support h265 video (like HLS), it can’t re-package the original h265 video with that ‘new’ audio, therefore even video needs to be transcoded.”
If you can confirm Direct play of the audio, I am at a loss. However, I suspect your shield is not hooked up to a device that can direct play/decode TrueHD, and what would be a simple computational act for your server of transcoding the audio is, due to a plex “bug” I suppose, making your server do something computationally complex it is not powerful enough to do: transcode 4K video. I don’t know of many TVs that can decode TrueHD so if your shield is hooked straight to your TV by HDMI (vs a TrueHD receiver) that could be your problem.
