[vlc-devel] JVLC - java.lang.UnsatisfiedLinkError: Unable to load library 'libvlc-control' under Windows

Geert Lorang geert.lorang at chello.be
Tue Apr 15 15:24:21 CEST 2008

Very small (but annoying) bugreport:

When using JVLC under Windows you always get this exception:
"Exception in thread "main" java.lang.UnsatisfiedLinkError: Unable to 
load library 'vlc-control': The specified module could not be found."
while it works fine under Linux. After some digging i found the cause of 
this behavior:

The DLL (under windows) is called "libvlc-control.dll" (under Linux it 
is "libvlc-control.so").
BUT the code (bindings/java/org/videolan/jvlc/internal/LibVlc.java) 
tries to load "vlc-control" instead of "libvlc-control".

The fact that it works under Linux and not under Windows is because of 
the appended prefixes in NativeLibrary.java (JNA)
Take a look at lines 89-108 at 
(looks like JNA's svn is password protected)

There are a couple of solutions to fix this bug:
* Rename  your dll under windows to  "vlc-control.dll"
* Change the code in LibVlc.java  to load "vlc-control" instead of 
"libvlc-control" (preferred solution?)
* Let VLC produce "vlc-control.dll/so" at compilation time

Build information:

Linux: Ubuntu 7.10 - vlc-snapshot-20080410.tar.bz2
Windows: Windows XP Pro SP2 - cygwin - git checked out yesterday

Anyway, keep up the good work!

Geert Lorang

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