Buffering with subtitles on LG Smart TV Plex app ONLY - works fine on other devices and via TV web browser

Plex Players Smart TVs
7

Is the audio transcoding? Check playback via Plex Dashboard.

With the Plex webOS app, if the audio is transcoding, enabling any form of subtitles results in a video transcode.

Plex Media Server will burn the subtitles into the video stream. On Linux based systems, subtitle burning occurs on the CPU, even when using hardware accelerated transcoding. Furthermore, the process is single threaded. Systems with low power CPUs, such as the Celeron in your NAS, struggle with the subtitle burning process, as they may not be able to burn subtitles in real time.

How the Plex webOS app handles subtitles:

  1. Enabling PGS or VOBSUB subtitles results in a video transcode.
  2. If the audio is transcoding, enabling any subtitle results in a video transcode.
  3. If the audio is direct playing, text subtitles, SRT & VTT, direct play.
    For SSA/ASS subtitles:
  4. If Burn Subtitles = Automatic, enabling SSA/ASS subtitles results in a video transcode.
  5. If Burn Subtitles = Image Formats Only, SSA/ASS subtitles direct play, but formatting information (location, color, etc) is lost.
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