# LoadError: InitError: could not load library "avcodec-58.dll" (Windows 10)

**URL:** <https://discourse.julialang.org/t/loaderror-initerror-could-not-load-library-avcodec-58-dll-windows-10/48091>\
**Category:** Visualization\
**Tags:** plotting, error\
**Created:** [October 10, 2020, 7:33am UTC](https://discourse.julialang.org/t/loaderror-initerror-could-not-load-library-avcodec-58-dll-windows-10/48091 "2020-10-10T07:33:58Z")\
**Posts on this page:** 15\
**Page:** 1

<div class="post-metadata">

**Author:** ![afishy](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/afishy/32/18870_2.png) [@afishy](https://discourse.julialang.org/u/afishy)\
**Post date:** [October 10, 2020, 7:33am UTC](https://discourse.julialang.org/t/loaderror-initerror-could-not-load-library-avcodec-58-dll-windows-10/48091/1 "2020-10-10T07:33:58Z")

</div>

As of today I haven’t been able to precompile any package that requires FFMPEG.jl, getting this error:

```julia
ERROR: LoadError: InitError: could not load library "C:\Users\aresf\.julia\artifacts\7350a6401f1c0d38cc3518193083bc4f83adfe99\bin/avcodec-58.dll"
The specified procedure could not be found.
Stacktrace:
 [1] dlopen(::String, ::UInt32; throw_error::Bool) at D:\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.5\Libdl\src\Libdl.jl:109
 [2] dlopen(::String, ::UInt32) at D:\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.5\Libdl\src\Libdl.jl:109
 [3] macro expansion at C:\Users\aresf\.julia\packages\JLLWrappers\m1BKg\src\products\library_generators.jl:61 [inlined]
 [4] __init__ () at C:\Users\aresf\.julia\packages\FFMPEG_jll\7oXwC\src\wrappers\x86_64-w64-mingw32.jl:41
 [5] _include_from_serialized(::String, ::Array{Any,1}) at .\loading.jl:697
 [6] _require_search_from_serialized(::Base.PkgId, ::String) at .\loading.jl:782
 [7] _require(::Base.PkgId) at .\loading.jl:1007
 [8] require(::Base.PkgId) at .\loading.jl:928
 [9] require(::Module, ::Symbol) at .\loading.jl:923
 [10] include(::Function, ::Module, ::String) at .\Base.jl:380
 [11] include(::Module, ::String) at .\Base.jl:368
 [12] top-level scope at none:2
 [13] eval at .\boot.jl:331 [inlined]
 [14] eval(::Expr) at .\client.jl:467
 [15] top-level scope at .\none:3
during initialization of module FFMPEG_jll
in expression starting at C:\Users\aresf\.julia\packages\FFMPEG\aazvf\src\FFMPEG.jl:3
ERROR: LoadError: Failed to precompile FFMPEG [c87230d0-a227-11e9-1b43-d7ebe4e7570a] to C:\Users\aresf\.julia\compiled\v1.5\FFMPEG\TGvga_7S4Og.ji.
Stacktrace:
 [1] error(::String) at .\error.jl:33
 [2] compilecache(::Base.PkgId, ::String) at .\loading.jl:1305
 [3] _require(::Base.PkgId) at .\loading.jl:1030
 [4] require(::Base.PkgId) at .\loading.jl:928
 [5] require(::Module, ::Symbol) at .\loading.jl:923
 [6] include(::Function, ::Module, ::String) at .\Base.jl:380
 [7] include(::Module, ::String) at .\Base.jl:368
 [8] top-level scope at none:2
 [9] eval at .\boot.jl:331 [inlined]
 [10] eval(::Expr) at .\client.jl:467
 [11] top-level scope at .\none:3
in expression starting at C:\Users\aresf\.julia\packages\Plots\D7Ica\src\Plots.jl:15
ERROR: Failed to precompile Plots [91a5bcdd-55d7-5caf-9e0b-520d859cae80] to C:\Users\aresf\.julia\compiled\v1.5\Plots\ld3vC_7S4Og.ji.
Stacktrace:
 [1] error(::String) at .\error.jl:33
 [2] compilecache(::Base.PkgId, ::String) at .\loading.jl:1305
 [3] _require(::Base.PkgId) at .\loading.jl:1030
 [4] require(::Base.PkgId) at .\loading.jl:928
 [5] require(::Module, ::Symbol) at .\loading.jl:923

```

FFMPEG is installed and pointed to in the PATH variable. Any clues?

(Btw I noticed that the path `\bin/avcodec-58.dll"` is written wrong for Windows. In case that’s the problem, where could I find the file that may be hardcoding the " / "?)

Thanks!!

---

<div class="post-metadata">

**Author:** ![Arthur\_Kalb](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/arthur_kalb/32/18542_2.png) [@Arthur\_Kalb](https://discourse.julialang.org/u/Arthur_Kalb)\
**Post date:** [October 10, 2020, 8:29am UTC](https://discourse.julialang.org/t/loaderror-initerror-could-not-load-library-avcodec-58-dll-windows-10/48091/2 "2020-10-10T08:29:30Z")

</div>

I’m getting a similar error.

---

<div class="post-metadata">

**Author:** ![giordano](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/giordano/32/2166_2.png) [@giordano](https://discourse.julialang.org/u/giordano)\
**Post date:** [October 10, 2020, 9:03am UTC](https://discourse.julialang.org/t/loaderror-initerror-could-not-load-library-avcodec-58-dll-windows-10/48091/3 "2020-10-10T09:03:36Z")

</div>

I’m aware of the issue, a fix will hopefully come soon™

---

<div class="post-metadata">

**Author:** ![giordano](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/giordano/32/2166_2.png) [@giordano](https://discourse.julialang.org/u/giordano)\
**Post date:** [October 10, 2020, 9:30am UTC](https://discourse.julialang.org/t/loaderror-initerror-could-not-load-library-avcodec-58-dll-windows-10/48091/4 "2020-10-10T09:30:14Z")

</div>

@afishy However it would be great if you could run these commands right _after_ you get the error above and post here the output

```julia
]add DependencyWalker
using DependencyWalker
Library(raw"C:\Users\aresf\.julia\artifacts\7350a6401f1c0d38cc3518193083bc4f83adfe99\bin/avcodec-58.dll")

```

---

<div class="post-metadata">

**Author:** ![oheil](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/oheil/32/220745_2.png) [@oheil](https://discourse.julialang.org/u/oheil)\
**Post date:** [October 10, 2020, 9:49am UTC](https://discourse.julialang.org/t/loaderror-initerror-could-not-load-library-avcodec-58-dll-windows-10/48091/5 "2020-10-10T09:49:04Z")

</div>

Just ran into the same. Here is what DependencyWalker gives:

```julia
julia> using DependencyWalker

julia> Library(raw"C:\Users\Oli\.julia\artifacts\7350a6401f1c0d38cc3518193083bc4f83adfe99\bin/avcodec-58.dll")
◼ C:\Users\Oli\.julia\artifacts\7350a6401f1c0d38cc3518193083bc4f83adfe99\bin/avcodec-58.dll
  ◼ C:\WINDOWS\System32\ole32.dll
    ◼ C:\WINDOWS\System32\RPCRT4.dll
      ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)
      ◼ C:\WINDOWS\System32\KERNELBASE.dll
        ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)
    ◼ C:\WINDOWS\System32\KERNEL32.DLL
      ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)
      ◼ C:\WINDOWS\System32\KERNELBASE.dll
        ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)
    ◼ C:\WINDOWS\System32\USER32.dll
      ❓ C:\WINDOWS\System32\win32u.dll (COULD NOT READ METADATA)
      ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)
      ◼ C:\WINDOWS\System32\KERNELBASE.dll
        ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)
      ◼ C:\WINDOWS\System32\GDI32.dll
        ❓ C:\WINDOWS\System32\win32u.dll (COULD NOT READ METADATA)
        ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)
    ◼ C:\WINDOWS\System32\combase.dll
      ◼ C:\WINDOWS\System32\RPCRT4.dll
        ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)
        ◼ C:\WINDOWS\System32\KERNELBASE.dll
          ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)
      ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)
      ◼ C:\WINDOWS\System32\KERNELBASE.dll
        ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)
    ◼ C:\WINDOWS\System32\GDI32.dll
      ❓ C:\WINDOWS\System32\win32u.dll (COULD NOT READ METADATA)
      ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)
    ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)
    ◼ C:\WINDOWS\System32\KERNELBASE.dll
      ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)
  ◼ C:\Users\Oli\AppData\Local\Programs\Julia 1.5.0\bin\libwinpthread-1.dll
    ◼ C:\WINDOWS\System32\msvcrt.dll
      ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)
      ◼ C:\WINDOWS\System32\KERNELBASE.dll
        ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)
    ◼ C:\WINDOWS\System32\KERNEL32.DLL
      ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)
      ◼ C:\WINDOWS\System32\KERNELBASE.dll
        ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)
  ✗ libvorbisenc-2.dll (NOT FOUND)
  ◼ C:\WINDOWS\System32\KERNEL32.DLL
    ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)
    ◼ C:\WINDOWS\System32\KERNELBASE.dll
      ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)
  ✗ libmp3lame-0.dll (NOT FOUND)
  ✗ libopus-0.dll (NOT FOUND)
  ✗ libz.dll (NOT FOUND)
  ✗ libx265.dll (NOT FOUND)
  ◼ C:\WINDOWS\System32\USER32.dll
    ❓ C:\WINDOWS\System32\win32u.dll (COULD NOT READ METADATA)
    ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)
    ◼ C:\WINDOWS\System32\KERNELBASE.dll
      ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)
    ◼ C:\WINDOWS\System32\GDI32.dll
      ❓ C:\WINDOWS\System32\win32u.dll (COULD NOT READ METADATA)
      ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)
  ◼ C:\WINDOWS\System32\msvcrt.dll
    ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)
    ◼ C:\WINDOWS\System32\KERNELBASE.dll
      ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)
  ✗ libvorbis-0.dll (NOT FOUND)
  ✗ libfdk-aac-1.dll (NOT FOUND)
  ✗ swresample-3.dll (NOT FOUND)
  ✗ libx264-161.dll (NOT FOUND)
  ✗ MFPlat.DLL (NOT FOUND)
  ✗ avutil-56.dll (NOT FOUND)

```

It is exactly this right after error.

---

<div class="post-metadata">

**Author:** ![giordano](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/giordano/32/2166_2.png) [@giordano](https://discourse.julialang.org/u/giordano)\
**Post date:** [October 10, 2020, 10:43am UTC](https://discourse.julialang.org/t/loaderror-initerror-could-not-load-library-avcodec-58-dll-windows-10/48091/6 "2020-10-10T10:43:16Z")

</div>

> [@Plots broken on Windows bc FFMPEG broken bc avcodec-58.dll cant be loaded](https://discourse.julialang.org/t/plots-broken-on-windows-bc-ffmpeg-broken-bc-avcodec-58-dll-cant-be-loaded/48092/16):
>
> Just updating the registry should now automatically bring you a working version of FFMPEG\_jll (v4.3.1+2), but the root problem is still unclear.

---

<div class="post-metadata">

**Author:** ![VivMendes](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/vivmendes/32/16477_2.png) [@VivMendes](https://discourse.julialang.org/u/VivMendes)\
**Post date:** [October 10, 2020, 3:07pm UTC](https://discourse.julialang.org/t/loaderror-initerror-could-not-load-library-avcodec-58-dll-windows-10/48091/7 "2020-10-10T15:07:27Z")

</div>

In my case, apparently, all packages are working OK in Atom. However, the Julia kernel in the Jupyter environment is not working properly. Despite having and (seeing) the kernel for Julia 1.5.2 installed, I get a funny message:

![image](https://global.discourse-cdn.com/julialang/original/3X/9/a/9a383b68ed433720f7df6870d06c527075fb906d.png)

In the end, I can have work done with Julia in Jupyter; the problem is that LaTeX markdown loses its formatting and the kernel works extremely slow.

I updated the registry, and definitely, the .dll file is not found:

```julia
Library(raw"C:\Users\manue\.julia\artifacts\7350a6401f1c0d38cc3518193083bc4f83

       adfe99\bin/avcodec-58.dll")
✗ C:\Users\manue\.julia\artifacts\7350a6401f1c0d38cc3518193083bc4f83     

adfe99\bin/avcodec-58.dll (NOT FOUND)

```

Thanks

---

<div class="post-metadata">

**Author:** ![giordano](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/giordano/32/2166_2.png) [@giordano](https://discourse.julialang.org/u/giordano)\
**Post date:** [October 10, 2020, 3:13pm UTC](https://discourse.julialang.org/t/loaderror-initerror-could-not-load-library-avcodec-58-dll-windows-10/48091/8 "2020-10-10T15:13:16Z")

</div>

> [@VivMendes](#):
>
> ```julia
> Library(raw"C:\Users\manue\.julia\artifacts\7350a6401f1c0d38cc3518193083bc4f83
> 
> adfe99\bin/avcodec-58.dll")
> ✗ C:\Users\manue\.julia\artifacts\7350a6401f1c0d38cc3518193083bc4f83     
> 
> adfe99\bin/avcodec-58.dll (NOT FOUND)
> 
> ```

There is a newline break in your call, you should do

```julia
Library(raw"C:\Users\manue\.julia\artifacts\7350a6401f1c0d38cc3518193083bc4f83adfe99\bin/avcodec-58.dll")

```

but anyway this function will not solve any issue, it’s only a debugging tool.

Are you sure you have update the registry? However your issue appears totally unrelated to the one discussed above in this thread, I’d recommend you opening a new topic.

---

<div class="post-metadata">

**Author:** ![VivMendes](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/vivmendes/32/16477_2.png) [@VivMendes](https://discourse.julialang.org/u/VivMendes)\
**Post date:** [October 10, 2020, 3:40pm UTC](https://discourse.julialang.org/t/loaderror-initerror-could-not-load-library-avcodec-58-dll-windows-10/48091/9 "2020-10-10T15:40:16Z")

</div>

Thanks a lot for the speedy reply. Sorry for the line break; it’s the copy+past thing…

Yes I updated the registry

```julia
((@v1.5) pkg> up
   Updating registry at `C:\Users\manue\.julia\registries\General`       
No Changes to `C:\Users\manue\.julia\environments\v1.5\Project.toml`     
No Changes to `C:\Users\manue\.julia\environments\v1.5\Manifest.toml`  

```

And I also did as you suggested:

```julia
(@v1.5) pkg> add DependencyWalker
  Resolving package versions...
No Changes to `C:\Users\manue\.julia\environments\v1.5\Project.toml`
No Changes to `C:\Users\manue\.julia\environments\v1.5\Manifest.toml`

```

and I got this:

```julia
julia> Library(raw"C:\Users\manue\.julia\artifacts\7350a6401f1c0d38cc3518193083bc4f83adfe99\bin/avcodec-58.dll")
◼ C:\Users\manue\.julia\artifacts\7350a6401f1c0d38cc3518193083bc4f83adfe99\bin/avcodec-58.dll
  ◼ C:\WINDOWS\System32\ole32.dll
    ◼ C:\WINDOWS\System32\RPCRT4.dll
      ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)
      ◼ C:\WINDOWS\System32\KERNELBASE.dll
        ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)        
    ◼ C:\WINDOWS\System32\KERNEL32.DLL
      ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)
      ◼ C:\WINDOWS\System32\KERNELBASE.dll
        ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)        
    ◼ C:\WINDOWS\System32\USER32.dll
      ❓ C:\WINDOWS\System32\win32u.dll (COULD NOT READ METADATA)
      ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)
      ◼ C:\WINDOWS\System32\KERNELBASE.dll
        ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)
      ◼ C:\WINDOWS\System32\GDI32.dll
        ❓ C:\WINDOWS\System32\win32u.dll (COULD NOT READ METADATA)       
        ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)        
    ◼ C:\WINDOWS\System32\combase.dll
      ◼ C:\WINDOWS\System32\RPCRT4.dll
        ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)        
        ◼ C:\WINDOWS\System32\KERNELBASE.dll
          ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)      
      ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)
      ◼ C:\WINDOWS\System32\KERNELBASE.dll
        ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)        
    ◼ C:\WINDOWS\System32\GDI32.dll
      ❓ C:\WINDOWS\System32\win32u.dll (COULD NOT READ METADATA)
      ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)
    ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)
    ◼ C:\WINDOWS\System32\KERNELBASE.dll
      ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)
  ◼ C:\Users\manue\AppData\Local\Programs\Julia 1.5.2\bin\libwinpthread-1.dll
    ◼ C:\WINDOWS\System32\msvcrt.dll
      ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)
      ◼ C:\WINDOWS\System32\KERNELBASE.dll
        ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)        
    ◼ C:\WINDOWS\System32\KERNEL32.DLL
      ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)
      ◼ C:\WINDOWS\System32\KERNELBASE.dll
        ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)
  ◼ C:\Users\manue\.julia\artifacts\a934706fd183ead565854bf73513431fb834f7b2\bin\libvorbisenc-2.dll
    ◼ C:\WINDOWS\System32\msvcrt.dll
      ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)
      ◼ C:\WINDOWS\System32\KERNELBASE.dll
        ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)        
    ◼ C:\Users\manue\.julia\artifacts\a934706fd183ead565854bf73513431fb834f7b2\bin\libvorbis-0.dll
      ◼ C:\Users\manue\.julia\artifacts\0df981fb7ab2cbb70313545402c29e8c841650a6\bin\libogg-0.dll
        ◼ C:\WINDOWS\System32\msvcrt.dll
          ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)      
          ◼ C:\WINDOWS\System32\KERNELBASE.dll
            ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)    
        ◼ C:\WINDOWS\System32\KERNEL32.DLL
          ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)      
          ◼ C:\WINDOWS\System32\KERNELBASE.dll
            ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)    
      ◼ C:\WINDOWS\System32\msvcrt.dll
        ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)        
        ◼ C:\WINDOWS\System32\KERNELBASE.dll
          ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)      
      ◼ C:\WINDOWS\System32\KERNEL32.DLL
        ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)        
        ◼ C:\WINDOWS\System32\KERNELBASE.dll
          ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)      
    ◼ C:\WINDOWS\System32\KERNEL32.DLL
      ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)
      ◼ C:\WINDOWS\System32\KERNELBASE.dll
        ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)        
  ◼ C:\WINDOWS\System32\KERNEL32.DLL
    ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)
    ◼ C:\WINDOWS\System32\KERNELBASE.dll
      ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)
  ◼ C:\Users\manue\.julia\artifacts\0fb011c1c579038491935467b7fc6bfe7bd3abb9\bin\libmp3lame-0.dll
    ◼ C:\WINDOWS\System32\USER32.dll
      ❓ C:\WINDOWS\System32\win32u.dll (COULD NOT READ METADATA)
      ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)
      ◼ C:\WINDOWS\System32\KERNELBASE.dll
        ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)        
      ◼ C:\WINDOWS\System32\GDI32.dll
        ❓ C:\WINDOWS\System32\win32u.dll (COULD NOT READ METADATA)       
        ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)        
    ◼ C:\WINDOWS\System32\msvcrt.dll
      ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)
      ◼ C:\WINDOWS\System32\KERNELBASE.dll
        ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)        
    ◼ C:\WINDOWS\System32\KERNEL32.DLL
      ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)
      ◼ C:\WINDOWS\System32\KERNELBASE.dll
        ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)        
  ◼ C:\Users\manue\.julia\artifacts\193e0922576124c49718ffe018db52c84a06b9de\bin\libopus-0.dll
    ◼ C:\WINDOWS\System32\msvcrt.dll
      ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)
      ◼ C:\WINDOWS\System32\KERNELBASE.dll
        ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)        
    ◼ C:\WINDOWS\System32\KERNEL32.DLL
      ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)
      ◼ C:\WINDOWS\System32\KERNELBASE.dll
        ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)        
  ◼ C:\Users\manue\.julia\artifacts\5ea43503c7796016c3a937d84b6bcf91b1bb608f\bin\libz.dll
    ◼ C:\WINDOWS\System32\msvcrt.dll
      ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)
      ◼ C:\WINDOWS\System32\KERNELBASE.dll
        ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)        
    ◼ C:\WINDOWS\System32\KERNEL32.DLL
      ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)
      ◼ C:\WINDOWS\System32\KERNELBASE.dll
        ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)        
  ◼ C:\Users\manue\.julia\artifacts\ca98225bdc5540d1079383ab4c02dd3c2d328edc\bin\libx265.dll
    ◼ C:\Users\manue\AppData\Local\Programs\Julia 1.5.2\bin\libstdc++-6.dll
      ◼ C:\Users\manue\AppData\Local\Programs\Julia 1.5.2\bin\libwinpthread-1.dll
        ◼ C:\WINDOWS\System32\msvcrt.dll
          ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)      
          ◼ C:\WINDOWS\System32\KERNELBASE.dll
            ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)    
        ◼ C:\WINDOWS\System32\KERNEL32.DLL
          ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)
          ◼ C:\WINDOWS\System32\KERNELBASE.dll
            ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)    
      ◼ C:\Users\manue\AppData\Local\Programs\Julia 1.5.2\bin\libgcc_s_seh-1.dll
        ◼ C:\Users\manue\AppData\Local\Programs\Julia 1.5.2\bin\libwinpthread-1.dll
          ◼ C:\WINDOWS\System32\msvcrt.dll
            ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)    
            ◼ C:\WINDOWS\System32\KERNELBASE.dll
              ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)  
          ◼ C:\WINDOWS\System32\KERNEL32.DLL
            ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)    
            ◼ C:\WINDOWS\System32\KERNELBASE.dll
              ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)  
        ◼ C:\WINDOWS\System32\msvcrt.dll
          ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)      
          ◼ C:\WINDOWS\System32\KERNELBASE.dll
            ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)    
        ◼ C:\WINDOWS\System32\KERNEL32.DLL
          ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)      
          ◼ C:\WINDOWS\System32\KERNELBASE.dll
            ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)    
      ◼ C:\WINDOWS\System32\msvcrt.dll
        ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)        
        ◼ C:\WINDOWS\System32\KERNELBASE.dll
          ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)      
      ◼ C:\WINDOWS\System32\KERNEL32.DLL
        ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)
        ◼ C:\WINDOWS\System32\KERNELBASE.dll
          ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)      
    ◼ C:\WINDOWS\System32\msvcrt.dll
      ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)
      ◼ C:\WINDOWS\System32\KERNELBASE.dll
        ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)        
    ◼ C:\WINDOWS\System32\KERNEL32.DLL
      ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)
      ◼ C:\WINDOWS\System32\KERNELBASE.dll
        ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)        
  ◼ C:\WINDOWS\System32\USER32.dll
    ❓ C:\WINDOWS\System32\win32u.dll (COULD NOT READ METADATA)
    ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)
    ◼ C:\WINDOWS\System32\KERNELBASE.dll
      ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)
    ◼ C:\WINDOWS\System32\GDI32.dll
      ❓ C:\WINDOWS\System32\win32u.dll (COULD NOT READ METADATA)
      ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)
  ◼ C:\WINDOWS\System32\msvcrt.dll
    ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)
    ◼ C:\WINDOWS\System32\KERNELBASE.dll
      ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)
  ◼ C:\Users\manue\.julia\artifacts\a934706fd183ead565854bf73513431fb834f7b2\bin\libvorbis-0.dll
    ◼ C:\Users\manue\.julia\artifacts\0df981fb7ab2cbb70313545402c29e8c841650a6\bin\libogg-0.dll
      ◼ C:\WINDOWS\System32\msvcrt.dll
        ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)        
        ◼ C:\WINDOWS\System32\KERNELBASE.dll
          ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)      
      ◼ C:\WINDOWS\System32\KERNEL32.DLL
        ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)        
        ◼ C:\WINDOWS\System32\KERNELBASE.dll
          ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)      
    ◼ C:\WINDOWS\System32\msvcrt.dll
      ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)
      ◼ C:\WINDOWS\System32\KERNELBASE.dll
        ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)        
    ◼ C:\WINDOWS\System32\KERNEL32.DLL
      ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)
      ◼ C:\WINDOWS\System32\KERNELBASE.dll
        ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)        
  ◼ C:\Users\manue\.julia\artifacts\ff37fcc80050ffc25ef51f5fae04c0d02c55369d\bin\libfdk-aac-1.dll
    ◼ C:\WINDOWS\System32\USER32.dll
      ❓ C:\WINDOWS\System32\win32u.dll (COULD NOT READ METADATA)
      ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)
      ◼ C:\WINDOWS\System32\KERNELBASE.dll
        ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)        
      ◼ C:\WINDOWS\System32\GDI32.dll
        ❓ C:\WINDOWS\System32\win32u.dll (COULD NOT READ METADATA)       
        ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)        
    ◼ C:\WINDOWS\System32\msvcrt.dll
      ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)
      ◼ C:\WINDOWS\System32\KERNELBASE.dll
        ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)        
    ◼ C:\WINDOWS\System32\KERNEL32.DLL
      ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)
      ◼ C:\WINDOWS\System32\KERNELBASE.dll
        ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)        
  ◼ C:\Users\manue\.julia\artifacts\7350a6401f1c0d38cc3518193083bc4f83adfe99\bin\swresample-3.dll
    ◼ C:\WINDOWS\System32\msvcrt.dll
      ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)
      ◼ C:\WINDOWS\System32\KERNELBASE.dll
        ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)        
    ◼ C:\Users\manue\.julia\artifacts\7350a6401f1c0d38cc3518193083bc4f83adfe99\bin\avutil-56.dll
      ◼ C:\WINDOWS\System32\USER32.dll
        ❓ C:\WINDOWS\System32\win32u.dll (COULD NOT READ METADATA)       
        ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)
        ◼ C:\WINDOWS\System32\KERNELBASE.dll
          ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)      
        ◼ C:\WINDOWS\System32\GDI32.dll
          ❓ C:\WINDOWS\System32\win32u.dll (COULD NOT READ METADATA)     
          ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)      
      ◼ C:\WINDOWS\System32\msvcrt.dll
        ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)        
        ◼ C:\WINDOWS\System32\KERNELBASE.dll
          ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)      
      ◼ C:\WINDOWS\System32\bcrypt.dll
        ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)        
      ◼ C:\WINDOWS\System32\KERNEL32.DLL
        ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)        
        ◼ C:\WINDOWS\System32\KERNELBASE.dll
          ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)      
    ◼ C:\WINDOWS\System32\KERNEL32.DLL
      ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)
      ◼ C:\WINDOWS\System32\KERNELBASE.dll
        ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)        
  ◼ C:\Users\manue\.julia\artifacts\22972166ea03ebe73064e6dafa14f0400ab94c46\bin\libx264-161.dll
    ◼ C:\WINDOWS\System32\USER32.dll
      ❓ C:\WINDOWS\System32\win32u.dll (COULD NOT READ METADATA)
      ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)
      ◼ C:\WINDOWS\System32\KERNELBASE.dll
        ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)        
      ◼ C:\WINDOWS\System32\GDI32.dll
        ❓ C:\WINDOWS\System32\win32u.dll (COULD NOT READ METADATA)       
        ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)        
    ◼ C:\WINDOWS\System32\msvcrt.dll
      ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)
      ◼ C:\WINDOWS\System32\KERNELBASE.dll
        ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)        
    ◼ C:\WINDOWS\System32\KERNEL32.DLL
      ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)
      ◼ C:\WINDOWS\System32\KERNELBASE.dll
        ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)        
  ◼ C:\WINDOWS\SYSTEM32\MFPlat.DLL
    ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)
    ◼ C:\WINDOWS\System32\msvcrt.dll
      ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)
      ◼ C:\WINDOWS\System32\KERNELBASE.dll
        ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)        
  ◼ C:\Users\manue\.julia\artifacts\7350a6401f1c0d38cc3518193083bc4f83adfe99\bin\avutil-56.dll
    ◼ C:\WINDOWS\System32\USER32.dll
      ❓ C:\WINDOWS\System32\win32u.dll (COULD NOT READ METADATA)
      ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)
      ◼ C:\WINDOWS\System32\KERNELBASE.dll
        ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)        
      ◼ C:\WINDOWS\System32\GDI32.dll
        ❓ C:\WINDOWS\System32\win32u.dll (COULD NOT READ METADATA)       
        ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)
    ◼ C:\WINDOWS\System32\msvcrt.dll
      ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)
      ◼ C:\WINDOWS\System32\KERNELBASE.dll
        ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)        
    ◼ C:\WINDOWS\System32\bcrypt.dll
      ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)
    ◼ C:\WINDOWS\System32\KERNEL32.DLL
      ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)
      ◼ C:\WINDOWS\System32\KERNELBASE.dll
        ❓ C:\WINDOWS\SYSTEM32\ntdll.dll (COULD NOT READ METADATA)     

```

Can this problem be, somehow, related to Windows 10? I installed yesterday Julia 1.5.2 in a NEW computer (Windows 10), and I got this problem. Funny, three of my students also installed last week Julia 1.5.2 on Windows 10 machines … and no problem. In their case, everything works perfectly well

Thanks

---

<div class="post-metadata">

**Author:** ![giordano](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/giordano/32/2166_2.png) [@giordano](https://discourse.julialang.org/u/giordano)\
**Post date:** [October 10, 2020, 3:47pm UTC](https://discourse.julialang.org/t/loaderror-initerror-could-not-load-library-avcodec-58-dll-windows-10/48091/10 "2020-10-10T15:47:22Z")

</div>

> [@giordano](#):
>
> However your issue appears totally unrelated to the one discussed above in this thread, I’d recommend you opening a new topic.

As I said above, I don’t see how your issue is related to the one discussed in this thread. Please open a new one and discuss it there.

---

<div class="post-metadata">

**Author:** ![VivMendes](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/vivmendes/32/16477_2.png) [@VivMendes](https://discourse.julialang.org/u/VivMendes)\
**Post date:** [October 10, 2020, 3:47pm UTC](https://discourse.julialang.org/t/loaderror-initerror-could-not-load-library-avcodec-58-dll-windows-10/48091/11 "2020-10-10T15:47:48Z")

</div>

I see a lot of `SYSTEM32` in that box, but my system is a Windows 10, 64-bits. Do not know if this is relevant or not.

---

<div class="post-metadata">

**Author:** ![VivMendes](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/vivmendes/32/16477_2.png) [@VivMendes](https://discourse.julialang.org/u/VivMendes)\
**Post date:** [October 10, 2020, 3:48pm UTC](https://discourse.julialang.org/t/loaderror-initerror-could-not-load-library-avcodec-58-dll-windows-10/48091/12 "2020-10-10T15:48:21Z")

</div>

OK, thanks.

---

<div class="post-metadata">

**Author:** ![touste](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/touste/32/10758_2.png) [@touste](https://discourse.julialang.org/u/touste)\
**Post date:** [October 29, 2020, 8:08am UTC](https://discourse.julialang.org/t/loaderror-initerror-could-not-load-library-avcodec-58-dll-windows-10/48091/13 "2020-10-29T08:08:38Z")

</div>

Hi, I also got the exact same error on a new install (Windows 10, Julia 1.5.2). Turned out my system was a Windows N version (without video codecs installed by default).  
Installing [the media feature pack](https://support.microsoft.com/en-us/help/3145500/media-feature-pack-list-for-windows-n-editions) solved the issue.  
It might be helpful to put a warning in the Readme if this can be reproduced.

---

<div class="post-metadata">

**Author:** ![steve1029](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/steve1029/32/34514_2.png) [@steve1029](https://discourse.julialang.org/u/steve1029)\
**Post date:** [March 13, 2022, 12:21pm UTC](https://discourse.julialang.org/t/loaderror-initerror-could-not-load-library-avcodec-58-dll-windows-10/48091/14 "2022-03-13T12:21:22Z")

</div>

Wow Thanks! I solved the exact same error thanks to you!

---

<div class="post-metadata">

**Author:** ![drandran12](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/drandran12/32/220647_2.png) [@drandran12](https://discourse.julialang.org/u/drandran12)\
**Post date:** [November 1, 2022, 8:39am UTC](https://discourse.julialang.org/t/loaderror-initerror-could-not-load-library-avcodec-58-dll-windows-10/48091/15 "2022-11-01T08:39:16Z")

</div>

Finally, this solved it for me!