So two weeks ago, everything was playing great. Now, no content will play (only on my WebOS TV) as long as subtitles are ON and are using server-side burn-in. I’m not sure if the SmartTV (WebOS) client was updated. I’ve tried rolling back the PMS server a few versions, with no effect. All other dev…

I think the missing first character ET ... is a red herring. I’ve seen a few other posts on here about it. Apparently it’s not important enough for plex to fix. But I promise that it isn’t the problem. It’s been that way for a long time. I did finally give up and I factory reset the LG TV… I had al…

Good idea. I tried that and no improvement. At this point, I’m fairly certain it’s Plex for WebOS (LG) that is broken. It seems like everything else can play and burn subtitles. But for some reason the WebOS client cannot properly inform the server that subtitles need to be burned during content neg…

alllllmost. The WebOS client is (in fact) incapable of playing PGS and ASS subtitles. That’s never been a problem. It’s always used server-side burn-in to play them. What is new is the error screen (with the same settings). I tried your suggestion of disabling both DirectStream and DirectPlay in th…

LG TV - Using Subtitles on a Connected USB Device | LG USA Support LG TV - Using Subtitles on a Connected USB Device. Learn how to use, update, maintain and troubleshoot your LG devices and appliances.

@SE56 Even files that used to play without issue are now unable to play. The problem has started with either an update to WebOS or Plex for WebOS or both, but there’s no way to roll back to an older version, so I’m unable to test.

What if you disable transcoding to HEVC? Settings → Transcoder → Enable HEVC video Encoding (experimental) = Never

Yes. Tried that too. Even tried to turn off hardware-accelerated encoding entirely. Had no effect. So I left the settings enabled since they work for other clients just fine. At this point the problem seems to be entirely on the client side.

i’ve been getting similar issues. i can play anything i want on any device except my LG tv, and its apparent it’s only affecting shows that have subtitles that require transcoding. diving into the logs shows the following: Error parsing HTTP request: ET /video/:/transcode/universal/session/kdiafkcv…

I also factory reset, but no luck. Whenever Plex server decides to burn subtitles I get a playback error. Disabling Subtitle burn on the player fixes it for some media but makes other media unplayable. Disabling subtitles completely circumvents this issue but that’s no good if you want to watch fore…

Thank-you! A lot of my media uses the “ass” codec for subtitles and it was always erroring on my C2 OLED when trying to play with them enabled for a while now, but rolling back to 1.41.6.9685 has fixed the problem for me as well.

Plex for WebOS cannot play burned-in subtitles

Plex Players

pkasprz August 17, 2025, 1:00pm 15

Hello, I confirm the problem with burn-in subtitles on Plex client for WebOS. It’s related to recent plexmediaserver upgrade. I’ve upgraded to 1.42.1.10060 on Debian and can’t watch any movies with burn-in subtitles (like PGS). Rollback to my previous version 1.41.6.9685 resolves the problem. Transcoding itself works fine. Only burning-in subtitles doesn’t work.

Error - Previously working, playback now gives an error 'An unexpected playback problem occurred'

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Plex for WebOS cannot play burned-in subtitles

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