Plex losing subtitle while playing

Would like a clip - perhaps a 10 minute clip and steps to reproduce this
Information that would help

  • does it happen with sidecar subtitles or subtitles within mkv or both
  • is it on local connections or remote wan connections or both
  • does it happen when not seeking forward / back or resuming paused playback?
  • any specific Plex Web browser ?
  • is it happening with both bundled plex web (accessible through http://127.0.0.1:32400/web or http://ip-of-server:32400/web) and hosted plex web (accessible through https://app.plex.tv/desktop ) ?

I have already seen the post that says it is happening even without automatic quality adjustments

For reproducing the problem - i would need all the settings that are in use for Quality / Debug / Player
and please try to get logs captured soon after the loss of the subtitles - and note down the time please as close as possible to when it happened

For server logs - ensure debug logging enabled beforehand
see https://support.plex.tv/articles/201643703-reporting-issues-with-plex-media-server/

For Plex Web logs, please enable verbose logging beforehand
See https://support.plex.tv/articles/201611836-plex-web-app-logs/

If it is XBox see https://support.plex.tv/articles/206239048-xbox-one-logs/

and to capture the logs when the problem arises
For Plex Web/XBox One see the articles referenced above
For the server see https://support.plex.tv/articles/200250417-plex-media-server-log-files/

For providing the clip - if it is an mkv you can use tools such as mkvtoolnix to get the first 10 minutes of the video
See https://support.plex.tv/articles/201035968-generating-sample-files-from-media/

Hello,
This happens to me too from some months and is very annoying i must disable/enable subtitles or change resolution so they can start again.
I am watching avi with local subttitles in the same folder. Quality is automatic. I am accessing the server via plex.tv page.

Hello here

My Czech subs stop playing after 2 sentences in my serial.

Plex devs are on holiday ???

Version 1.15.6.1079

No, please provide sa2000 with the intel they need to investigate this further.
I don’t have the right players and content to reproduce the error at the moment.

So please guys, if any of you have the means, please provide some information that can help the devs.

Hope it helps

Console error repeating infinitely:

Tried switching automatic quality(Beta) on and off, without luck.
Tried also to hardcode subs into movie or serial…same bad luck.

Nothig more in log for now, try please to fix this and I will see if that helped or not, otheriwse I will continue logging.

Thanks

Switching “Burn Subtitles” to “Always” solved it for me.
Settings->Player->Show Advanced->Burn Subtitles

Yes but this will always trigger a transcode even if it’s not necessary.

That didnt help, also it is just a temporary fix…why should I use more CPU than necessary, Plex devs should solve this. :thinking:
On Emby, dev has fixed my Czech subtitles in one patch in about 2 days.
Here subtitles even doesn’t work and I am betting that half a year they wont work because here we have a much more time am I right ? :smiley: :beach_umbrella: :cocktail:

1 Like

Hello everybody.
Updated plex to ver. 1.15.8.1198

BUT

Still catching errors in console, its same as before. Somebody started to work on this ?
Czech people are really beated on this because subs in our language are not displaying…

Jun 16, 2019 12:57:54.208 [0x80f05f400] Chyba — [Transcoder] [subrip @ 0x80a3f3000] Invalid UTF-8 in decoded subtitles text; maybe missing -sub_charenc option
Jun 16, 2019 12:57:54.308 [0x80f05f400] Chyba — [Transcoder] Error while decoding stream #1:0: Invalid data found when processing input
Jun 16, 2019 12:57:54.408 [0x80e45af00] Chyba — [Transcoder] [subrip @ 0x80a3f3000] Invalid UTF-8 in decoded subtitles text; maybe missing -sub_charenc option
Jun 16, 2019 12:57:54.508 [0x80f05f400] Chyba — [Transcoder] Error while decoding stream #1:0: Invalid data found when processing input
Jun 16, 2019 12:57:54.708 [0x80f05f400] Chyba — [Transcoder] [subrip @ 0x80a3f3000] Invalid UTF-8 in decoded subtitles text; maybe missing -sub_charenc option
Jun 16, 2019 12:57:54.808 [0x80e45af00] Chyba — [Transcoder] Error while decoding stream #1:0: Invalid data found when processing input
Jun 16, 2019 12:57:54.819 [0x80c45de00] Ladění — Completed: [192.168.200.2:50649] 200 GET /video/:/transcode/universal/dash/esf74t7u4r9vyfdatoeyrol7/1/27.m4s (12 live) TLS GZIP 5746ms 195282 bytes (pipelined: 1)
Jun 16, 2019 12:57:54.908 [0x80f05f400] Chyba — [Transcoder] [subrip @ 0x80a3f3000] Invalid UTF-8 in decoded subtitles text; maybe missing -sub_charenc option
Jun 16, 2019 12:57:55.008 [0x80e45af00] Chyba — [Transcoder] Error while decoding stream #1:0: Invalid data found when processing input
Jun 16, 2019 12:57:55.108 [0x80f05f400] Chyba — [Transcoder] [subrip @ 0x80a3f3000] Invalid UTF-8 in decoded subtitles text; maybe missing -sub_charenc option
Jun 16, 2019 12:57:55.208 [0x80f266e00] Chyba — [Transcoder] Error while decoding stream #1:0: Invalid data found when processing input
Jun 16, 2019 12:57:55.408 [0x80f266e00] Chyba — [Transcoder] [subrip @ 0x80a3f3000] Invalid UTF-8 in decoded subtitles text; maybe missing -sub_charenc option
Jun 16, 2019 12:57:55.508 [0x80f266e00] Chyba — [Transcoder] Error while decoding stream #1:0: Invalid data found when processing input
Jun 16, 2019 12:57:55.608 [0x80f266e00] Chyba — [Transcoder] [subrip @ 0x80a3f3000] Invalid UTF-8 in decoded subtitles text; maybe missing -sub_charenc option
Jun 16, 2019 12:57:55.708 [0x80f05f400] Chyba — [Transcoder] Error while decoding stream #1:0: Invalid data found when processing input
Jun 16, 2019 12:57:55.808 [0x80f266e00] Chyba — [Transcoder] [subrip @ 0x80a3f3000] Invalid UTF-8 in decoded subtitles text; maybe missing -sub_charenc option
Jun 16, 2019 12:57:55.908 [0x80f05f400] Chyba — [Transcoder] Error while decoding stream #1:0: Invalid data found when processing input
Jun 16, 2019 12:57:56.108 [0x80f05f400] Chyba — [Transcoder] [subrip @ 0x80a3f3000] Invalid UTF-8 in decoded subtitles text; maybe missing -sub_charenc option
Jun 16, 2019 12:57:56.208 [0x80f05f400] Chyba — [Transcoder] Error while decoding stream #1:0: Invalid data found when processing input

For the web client at least, I was able to fix this by unchecking “Direct Play” in the settings under “Web Client” and “Debug”. I ran into this issue in the past and I remembered I had to disable Direct Play or Direct Stream, but I couldn’t remember which. It looks like it was Direct Play. I’ve managed to keep subtitles playing for 30 minutes now. Before they were dropping after a minute or two, if I re-selected the subtitles it would come back for another minute or two, but go away again. Now that I’ve unchecked Direct Play, it seems to have fixed the issue with the Web Player.

Your setting may be forcing a transcode and this is why the problem went away.

Thanks for the tip, I have tried to uncheck Direct Stream, but without luck.
Usually I watch plex on TV so this setting wont help me much.

Regarding these errors - would like a sample file to reproduce the problem and refer to the development team

Also please ensure debug logging is enabled and let me have full logs of the issue when reproduced with a sample file.

See these support articles
https://support.plex.tv/articles/201035968-generating-sample-files-from-media/

https://support.plex.tv/articles/201643703-reporting-issues-with-plex-media-server/
https://support.plex.tv/articles/200250417-plex-media-server-log-files/

For anyone else with subtitle issues please see my last post Plex losing subtitle while playing - #387 by sa2000

Here is the post. Surprisingly without answer :clap:

do we just assume this will always be a problem with plex then? it seems like people have been having this exact issue for literal years and it still hasn’t been fixed.

I can confirm the same issue on Plex for Samsung, latest version

I can confirm it on Samsung smart tv Plex app too. I’m having the same problem.

Same on my side (Samsung PLEX with MKV file)

this problem makes Plex literally useless for me. I have paid for it. Is there a way to get a refund?

3 Likes

Same …