Server Version#: 1.24.5.5173
Player Version#: Samsung TV
My mom and my sister have a Samsung smart TV and there using my plex server my mom’s was working till recently till we started getting a playback error…
my sisters TV gets the same error
|'m lost I don’t know what to do it works fine on my local network and works fine on my phone where every I am.
I went to Advanced → Allow Insecure Connections is set to Always and still nothing.
Is the content something that would need to be transcoded? If so then that’s the issue I have with a Samsung. Direct Play or Direct Stream is no problem but it will immediately fail if it needs to transcode.
it was never a problem before.
no fix in site for this? its happening on a lot of stuff
Hi
I also confirm the problem with PLEX operation on Samsung TV. The problem occurs during transcoding ONLY.
He receives two warning messages in the console:
“Caught exception trying to convert extra data attribute ‘originallyAvailableAt’ with type 1 and value ‘2021-11-05’ ~ bad lexical cast: source type value could not be interpreted as target”
and
“[Transcode] Got a request to stop a transcode session without a valid session GUID.”
And on the TV
“plex media file format unsupported”
I am asking for help in solving the problem
Following suggestions from:
I changed in app tv PLEX
settings - advanced - Allow incecure connections -
from “On same network as serwer” to “Alvays”
reset app
and at the moment transcoding on Samsung TV is working
I believe this is related to the expired cert problem with Samsung (and other TVs). I have managed to get remote working again by disabling secure connections altogether,
On the TV App
Settings>Advanced
Allow insecure connections: Always
Prefer insecure connections: Aways
On the Plex Server
Settings>Network
Secure Connections: Disabled
Unless Samsung (and others) update the cert then I suspect this will be the only way to play content from a remote server (barring VPNs etc).
I am not sure of the risk here but at least some of the traffic between your server and the remote client will be in clear-text. So there may be privacy concerns operating in this way. Plex themselves have recommended using a Chromecast or Roku as an alternative to the native TV app.
Search Samsung Expired Cert here should provide more details.
I tried doing the secure connection thing it was the first thing I tried and still nothing 
I am on the same boat with you, however I am running plex behind nginx reverse proxy.
Interestingly I am getting this issue on my new Samsung as well as a Roku 4. Not sure yet if they are both the same certificate issue. Any help to get this fixed would be great. My Apple TV on the same network is working without any issues.
I’ve found only playback from MKV format fails. MP4 works fine.
My guess was that Samsung dropped support for playing back open source files for some reason - maybe to address piracy obliquely - always hard to say why a large corporation changes something pretty fundamental but it usually creates problems for users when they do. Or it could just be a bug - who knows. What’s concerning is why I haven’t heard any official comments from Plex that would aim to address the situation. I find it hard to believe they don’t know about the issue. So far ALL of my Samsung users have complained to me about this and all I can recommend to them is to go buy a streaming box.
Does the cert issue only cause issues with some playback? I have a remote user with a 2018 Samsung TV and all of the sudden they are not able to play some files. It seems really hit and miss which ones play and which do not. I don’t want to troubleshoot if it is related to the cert issue but I thought that would be a problem with all playback.
I am having an issue with a remote user with a 2018 Samsung that, while possibly related to the certificate issue, is specific to transcodes. Any time my user tries a file that requires transcoding, it will show buffering on my side and then fail. I can see successful transcodes for this same user/device up through late September and I believe the certs expired on October 1st, so they do seem related in some way but always allowing insecure connections hasn’t helped. You may want to check if the files they’re having issues with are maybe 1080p or 4k and require transcodes, versus the others that are working.
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