most/all smart tvs do not support direct play of truehd. (and some don’t support dts)
plex will transcode audio to a compatible audio stream, most often eac3.
if subtitles are enabled, and audio is being transcoded, then plex will normally transcode the video, so that the audio, video, and subtitles can stay in sync.
in that case, you have 2 options:
- change the audio stream so it can direct play (as you have shown above)
- disable the subtitles, plex should transcode only the audio, the video should continue to direct play
direct stream, as you have pictured above, is plex simply remuxing the video, while transcoding the audio.
direct stream is generally much less processor intensive than transcoding.
more in depth info @ Plex, 4k, transcoding, and you
as far as dolby vision,
- its still a work in progress
- there are multiple DV profiles, and not all devices/tv’s support all the profiles
- some early rips, created before DV support was finalized in MKV spec, may need re-ripped, or re-processed, in order to play back properly
