Are the movies not showing up in the Plex app or are they listed, but you cannot play them on the LG TV?
If the latter…
With the Plex app on LG TVs, enabling PGS subtitles forces a video transcode. If your Plex server is not powerful enough to transcode 4K HDR video, then playback will buffer continuously or possibly fail altogether.
This is how the Plex LG app behaves with subtitles:
- Enabling image based subtitles, PGS or VOBSUB, results in a video transcode.
- If audio is transcoding, enabling any subtitle results in a video transcode.
- If audio is direct playing, text subtitles, SRT & VTT, direct play.
- For ASS/SSA subtitles:
- If Burn Subtitles = Automatic in the Plex LG app, enabling ASS/SSA subtitles results in a video transcode.
- If Burn Subtitles = Only Image Formats, ASS/SSA subtitles, direct play, but formatting information (color, location, etc) may be lost.
Audio limits must also be taken into account:
- TrueHD audio will always transcode
- dts audio formats transcode on WebOS 5+ TVs
Bottom line is, if your Plex server is not powerful enough to transcode the video, a) never enable image subtitles, and b) do not enable any subtitle if the audio is transcoding.
You can monitor playback via Plex Dashboard → Now Playing to see if the video or audio is transcoding.
