When running Plex Media Server on a Windows computer (and particularly if you’ve upgraded from a much older version of the server), it’s possible you might encounter transcoder-related issues. This might manifest in multiple ways, but some common symptoms include:
- Content can Direct Play, but fails when any type of transcoding is needed
- Media analysis fails and you don’t see media format information on item details/preplay screens
Verifying the Issue
You can verify whether this particular error is causing your issue by examining your Plex Media Server logs. Affected users will have a log line similar to the following:
Jul 23, 2016 03:41:35.686  ERROR - Unexpected error configuring transcoder: boost::filesystem::unique_path: Key not valid for use in specified state
After reproducing the issue, look inside your
Plex Media Server.log or
Plex Media Scanner Analysis.log files and then search for “
Key not valid for use in specified state“. If you see a log line similar to above with that text, then you’re affected by this issue.
If you’re not sure what to look for or where, post details in our support forums and be sure to attach your full set of Plex Media Server logs.
Resolving the Issue
The following steps will resolve the issue for the vast majority users.
- Stop/exit your Plex Media Server so it isn’t running
- In Windows Explorer, rename or move the following directory:
- Reboot the Windows computer
- Start Plex Media Server
That should cause the cryptographic cache information to be re-built automatically.