Since LG OLED do not support DTS audio, why video is always transcoded, when only audio needed?

[FordGuy61]

With the Plex WebOS app:

• Enabling image based (PGS/VOBSUB) subtitles forces a video transcode.
• If the audio is transcoding, enabling any subtitle forces a video transcode.

If the audio is not transcoding:

• SRT/VTT subtitles direct play.
• ASS subtitles force a video transcode if Subtitles = Automatic in app settings.
• ASS subtitles direct play if Subtitles = Only Image Formats in app settings.

Additional details:

Subtitles even in text formats (SRT, ASS, etc.) causes transcode of HDR files

Plex Media Server has to transcode the video to keep the video, audio, and subtitles in sync with each other. I don’t know if it is a limitation of TV hardware, WebOS, transport protocols, etc. Someone from Plex will have to provide the details. Edit: It is a limitation of the HLS protocol. See the following thread. The main topic is unrelated (and resolved), but the post provides info regarding LG, transcoded audio, and subtitles.