@sLumpy Are you guys aware of this issue?
The only thing that works for now is setting the burn subtitles setting to Always.
Original poster here. It looks like the problem is solved on my end. Earlier it would show up within minutes. I have used Plex with Direct Play and .srt subtitles for a several hours today without any issues.
Not sure if itâs the updated server version or player version which fixed it (or a combination)
Server Version#: 1.29.1.6316
Player Version#: 5.48.1
Sane here isuue still happening with 48
Gonna test it later
Version : 5.49.1
Platforms : Samsung 2016 to 2022 Televisions (Tizen 2.4, 3.0, 4.0, 5.0, 5.5, 6.0, 6.5)
NEW:
- Change search history from stacked list to horizontal list
- Add letter jump list to library filter options
FIXED:
- Fixed an issue where playback can time out when ads are playing
- Fixed tabs not animating when scrolling
- Watch from these locations: Fixed titles with long words overflowing card
- Improved performance while loading pre-play screens
New findings:
- Issue only happens when transcoding audio and direct playing video.
- Direct Play of both audio and video works ok. No audio desync
- When transcoding audio the image randomly glitches and the audio gets out of sync (subs do too)
- Also transcoding both audio and video works ok.
If you have a Samsung TV that supports DTS you are in luck because you can switch to Direct Play and it will always have a compatible audio format available. With no transcoding works ok.
To all users having this issue please if you can corroborate this findings would be great.
How to check if you are in Direct Play:
- If a movie that you are playing starts glitching or desyncing:
â Press the âINFOâ button in your remote control
â It should pop up a screen with information. Check if you are transcoding audio or video.
Remember that even with Direct Play enabled, it doesnât mean your TV is Direct Playing the media file. It depends on the capabilities of your TV. If you are playing a DTS-HD MA movie with a Samsung TV that doesnât support DTS then Plex will send transcoded audio. So itâs important that you check on every movie that you are playing even if DP is enabled.
Thanks
@andersd @R08 @PedroAntunes
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I have a Samsung TV that supports DTS. Direct play of files with video and audio tracks enabled only is fine and is the norm for me, issue only occurs when thereâs a text subtitle stream being played (usually forced english subs for foreign dialogue in my case).
Forcing transcoding by setting burn subtitles to always or disabling both direct play and direct stream fixes the issue although will usually make playback stop a minute or two before the end of the file which is not ideal obviously.
Really thought this issue wouldâve been fixed by now and it must be super annoying for anyone who needs subtitles all the time.
While earlier I posted about 5.49.1, I opened Plex and the version is now 5.49.2, but thereâs no release notes for this new version.
Now Iâm watching Andor which has more than 30 subtitles and it seems to be working fine.
One super small thing, the seek bar is now orange and black, instead of orange and gray/white as before.
This is the behavior I see, issue is only when audio needs transcoding, but I never watch transcoded video.
If the problem is audio, then how come if we change the subtitle burn setting from auto to always it fixed the issue?
Still happening for me as of today with both latest server and client versionsâŠ
Server version: 1.29.2.6364 (Mac)
Tizen version: 2.4
Samsung app version: 5.49.2
Essentially glitching/OOS occurs any time video and text subtitles are direct played/streamed simultaneously. Best fix for me is to set Burn Subtitles to âAlwaysâ so video transcoding is forced and audio direct streamed at least.
Works well with my reasonably high powered server transcoding at 60mbps over gigabit LAN but obviously wonât be the case for those with NAS or other low powered servers or patchy WiFi connections to contend with.
Iâm a big, big Plex fan and have been a Plex pass holder since the very early days but this is truly ridiculous, months now and multiple versions of both app and server released with no attempt at a fix as far as I can tell and zero input from Plex here in this thread. Seems like the more the platform grows the less concerned Plex are with keeping their end users happy sadly. 
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Because setting it to always forces a full transcode (both audio and video) so that fixes the issue
Do you have DTS (DCA) enabled in Plex? Do you have to switch to DTS mode every time you play a video with DTS audio on it? If thatâs the case, then my conclusions are wrong. But since I discovered that I re-enabled direct play for audio streams and the issue has never occurred again, and Iâve watched around 5 movies since then. Before it was always happening.
Will do more testing just to check
I do have DTS enabled yes although most of my content is E-AC3. Also setting Burn Subtitles to Always for me results in either no transcoding when there is no subtitle stream to be shown or in transcoded video an direct played audio when there is, at least according to the Info pane on the TV app.
still an issue here. and its aggravatingâŠ
if ill disable direct play and direct stream than the tv wont play the file at all and say âmultimedia file not supportedâ
really. what a shame. im looking into refunding my plex passâŠthis is useless.
New Version : 5.50.1
Platforms : Samsung 2016 to 2022 Televisions (Tizen 2.4, 3.0, 4.0, 5.0, 5.5, 6.0, 6.5)
NEW:
- Add cast hub to episodes screen
- Add extras hub to episodes screen
- Add Season Extras hub to episodes screen
FIXED:
- Fix offline server icon color in More menu being incorrect in some cases
- Fixed inline video previews sometimes appearing when they shouldnât
- Fixed invalid user PIN leading to a black screen
- Reduce flashing on some platforms when inline preview video starts
Still broken @sLumpy
I have two users on Samsung Tizen that have been experiencing all the same issues as told previously. The only fix iâve been able to do is remux the mkv files with mkvtoolnix and remove ALL subtitle streams. The files will then stream fine no transcoding. Problem is I have 100s of tv shows and movies where there are 30+ subtitle streams embedded. Removing/remuxing all these would be a nightmare. They are on version 5.32.1. I will try updating to newest (if possible).
Updated to 5.50.1. Still stuttering video with mkv files with multiple sub streams. (this is even when subtitles are turned off). If files are remuxed removing sub streams, works fine.
Forcing subtitles to burn ALWAYS did fix the issue.(read it after posting). But now its transcoding all audio to AAC.
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Iâve built a python script to do this automatically for me.
In my case, I want to keep subtitles in Portuguese only (not PT-BR) but it can be adjusted for other languages.
It does the following:
- If there is a Portuguese subtitle, keep just this subtitle, else, if there are more than 10 subtitles, remove all of them.
- If there is a Portuguese subtitle, also extract the subtitle to an .srt file, and attempt to add a workaround for italic subs missing a line break (another known bug on Samsung), and remove the
{\an8}tags that are not supported on my Samsung TV.
It uses mkvmerge and mkvextract which are part of the mkvtoolnix package, and I used it on a linux machine.
With this most of these last issues Iâve seen are âhiddenâ, except if the audio needs transcode.
Iâm attaching the script below in case someone wants to play with it. Execute with the command:
./stripSubtitles.py <path to the folder with the videos to fix>
NOTES:
- The âfixedâ file will replace the original file, so make a backup of the original if case you want to test.
- Iâm not a programmer, but found an original script somewhere and adapted it for my needs.
- Use at your own risk.
stripSubtitles.zip (2.3 KB)
Just FYI I have one of my files direct playing now, did it by stripping out all the subtitle streams except the one I actually need.
Youâll need mkvtoolnix installed, then use mkvinfo to get the proper track number (replaced with # here) for your desired subtitle stream then use mkvmerge -o New.File.Name.mkv -s # Original.File.Name to create a new file with just the stream you wanted, or replace -s # with -S to strip out all the subs if you donât want any.
Thatâll work for Linux/OS-X, if youâre a windows person youâll have to figure out how to translate it for yourself. 
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@sLumpy if youâre not responsible for fixing this, who is? Its apparent their is a problem with mkv files that have multiple substreams. Itâs been going on well over a month and affecting numerous people.
