I solved this Problem by: Updating to the latest beta server version of Synology (i think 4.0.8.21). Then go to your User Settings (On Android,Web,Windows) Go to your User that you want to play on your LG Tv.  Look for the Playback Settings and unmark Video Transcoding. Now it will transcode the DTS, DTS-HD, TrueHD etc. And subtitles. But the Video is untouched (direct Play,) WITH HDR. This only works for your Home Network (lan) Otherwise it says no compatible
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