I first tried replacing libmpv-2.dll with the one provided in
Releases · mitzsch/mpv-winbuild
That caused Plex to hang after replacing libmpv-2.dll with a newer version. The fix for me was to just install
Download Dolby AC-3/AC-4 Installer - MajorGeeks
And reboot.
I fixed it with those solutions too at first but there were these ugly programs in my applications so I fixed it with WinUtil Documentation instead as well as the tool can do a great other many things to boost performance and privacy. I used the config tab to install legacy media features
Thank you, this solved my issue!
This is the only solution that worked for me. TY.
Plex you should fire you dev team and crap support as well.
Keep raising your price and do nothing to fix the mobile app and other issues.
So, downloading the AC3 Codec worked for me, but now when opening the plex app it will either cut all other audio playing if I open it with other things playing (ex, Youtube via Firefox) or if it is the first app I open, all other apps will then not have audio working as well.
Exactly what needed to be done. A little disappointing that plex could not resolve the issue themselves. Thank you to the person who posted the link to the fix, and truly thanks to the peeps that created the fix.
This did it for me. Built a new PC and ran into the same issue, installed the “DolbyLaboratories.DolbyDigitalPlusDecoderOEM_1.1.285.0_neutral_~_rz1tebttyb220 (1).AppxBundle” Windows app from the MajorGeeks download you linked. After installing I closed/re-open the Plex Desktop app and I have audio again on the videos that previously had no audio!
This is a Windows 11 issue and not exactly a Plex issue, but I can understand people’s frustrations.
Thanks, this was the fix for me.
BEST SOLUTION BELOW! Legit from Dolby Laboratories. Easy install through MS Store.
this worked for me, thx
replacing the .dll worked for me today.
How on earth is this not getting addressed at this point - we are looking at at least 6 months of this - does PLEX have no plans to included the missing codecs in their installer?
December 2025….. still not fixed 
.Must be a one-person team.
Just install the E-AC3 codec. It’s a windows issue which takes very little effort to research and solve.
It’s not about solving the issue after the fact. It’s about providing a product that works out of the box. For us tech-savvy individuals, it’s not a problem, but imagine someone who isn’t and is just a viewer of our hosted server.
What is missing should be included within the installation, or should be automatically acquired during the installation. Hands-off automation is key; there should never be a scenario where we are told, “Oh, and you need this as well“.
For anyone still dealing with this issue but does not want to download from MajorGeeks, it can be installed directly from the Microsoft Store.
This is the only non-sketchy fix. thanks.
Getting it from the Microsoft Store would require linking your PC to a Microsoft Account, something many people have been working to avoid since Windows 8.
Different form of “sketchy” if you ask me…
