Problems with javafx-unixoid plugin (used by MicrosoftStreetside plugin)

[mdk]

What steps will reproduce the problem?

1. Start JOSM from a shell
2. Install MicrosoftStreetside plugin -> also installs javafx-unixoid plugin
3. restart JOSM

What is the expected result?

A working MicrosoftStreetside plugin.

What happens instead?

Several call stacks like

2021-04-27 21:13:12.809 INFO: loading plugin 'javafx-unixoid' (version 35655)
2021-04-27 21:13:13.345 SEVERE: java.lang.UnsatisfiedLinkError: /home/michael/.josm/plugins/javafx/libavplugin-ffmpeg-57.so: libgstreamer-lite.so: Kann die Shared-Object-Datei nicht öffnen: Datei oder Verzeichnis nicht gefunden
java.lang.UnsatisfiedLinkError: /home/michael/.josm/plugins/javafx/libavplugin-ffmpeg-57.so: libgstreamer-lite.so: Kann die Shared-Object-Datei nicht öffnen: Datei oder Verzeichnis nicht gefunden
	at java.base/jdk.internal.loader.NativeLibraries.load(Native Method)
	at java.base/jdk.internal.loader.NativeLibraries$NativeLibraryImpl.open(NativeLibraries.java:383)
	at java.base/jdk.internal.loader.NativeLibraries.loadLibrary(NativeLibraries.java:227)
	at java.base/jdk.internal.loader.NativeLibraries.loadLibrary(NativeLibraries.java:169)
	at java.base/java.lang.ClassLoader.loadLibrary(ClassLoader.java:2407)
	at java.base/java.lang.Runtime.load0(Runtime.java:747)
	at java.base/java.lang.System.load(System.java:1857)
	at org.openstreetmap.josm.plugins.javafx.JavaFxPlugin.loadNativeLib(JavaFxPlugin.java:134)
	at org.openstreetmap.josm.plugins.javafx.JavaFxPlugin.access$000(JavaFxPlugin.java:40)
	at org.openstreetmap.josm.plugins.javafx.JavaFxPlugin$LibVisitor.visitFile(JavaFxPlugin.java:118)
	at org.openstreetmap.josm.plugins.javafx.JavaFxPlugin$LibVisitor.visitFile(JavaFxPlugin.java:103)
	at java.base/java.nio.file.Files.walkFileTree(Files.java:2804)
	at java.base/java.nio.file.Files.walkFileTree(Files.java:2876)
	at org.openstreetmap.josm.plugins.javafx.JavaFxPlugin.loadNativeLibs(JavaFxPlugin.java:143)
	at org.openstreetmap.josm.plugins.javafx.JavaFxPlugin.<init>(JavaFxPlugin.java:53)
	at org.openstreetmap.josm.plugins.javafx.JavaFxPluginUnixoid.<init>(JavaFxPluginUnixoid.java:18)
	at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:64)
	at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	at java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:500)
	at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:481)
	at org.openstreetmap.josm.plugins.PluginInformation.load(PluginInformation.java:374)
	at org.openstreetmap.josm.plugins.PluginHandler.loadPlugin(PluginHandler.java:808)
	at org.openstreetmap.josm.plugins.PluginHandler.loadPlugins(PluginHandler.java:893)
	at org.openstreetmap.josm.plugins.PluginHandler.loadEarlyPlugins(PluginHandler.java:931)
	at org.openstreetmap.josm.gui.MainApplication.updateAndLoadEarlyPlugins(MainApplication.java:1194)
	at org.openstreetmap.josm.gui.MainApplication.mainJOSM(MainApplication.java:937)
	at org.openstreetmap.josm.gui.MainApplication$3.processArguments(MainApplication.java:280)
	at org.openstreetmap.josm.gui.MainApplication.main(MainApplication.java:737)

Please provide any additional information below. Attach a screenshot if possible.

All call stacks claim that libgstreamer-lite.so could not be found, but it is in the same directory, in my case /home/michael/.josm/plugins/javafx/libgstreamer-lite.so

Relative:URL: ^/trunk
Repository:UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Last:Changed Date: 2021-04-25 09:16:28 +0200 (Sun, 25 Apr 2021)
Revision:17821
Build-Date:2021-04-26 01:31:00
URL:https://josm.openstreetmap.de/svn/trunk

Identification: JOSM/1.5 (17821 en) Linux Ubuntu 20.10
Memory Usage: 452 MB / 1980 MB (287 MB allocated, but free)
Java version: 15+36-Ubuntu-1, Private Build, OpenJDK 64-Bit Server VM
Look and Feel: javax.swing.plaf.metal.MetalLookAndFeel
Screen: :0.0 3840×2160 (scaling 2.00×2.00)
Maximum Screen Size: 3840×2160
Best cursor sizes: 16×16→16×16, 32×32→32×32
Environment variable LANG: de_CH.UTF-8
System property file.encoding: UTF-8
System property sun.jnu.encoding: UTF-8
Locale info: en_CH
Numbers with default locale: 1234567890 -> 1234567890
Desktop environment: ubuntu:GNOME
Java ATK Wrapper package: libatk-wrapper-java:all-0.38.0-1
libcommons-compress-java: libcommons-compress-java:all-1.20-1
libcommons-logging-java: libcommons-logging-java:all-1.2-2
fonts-noto: fonts-noto:all-20200323-1build1
VM arguments: [--add-modules=java.scripting,java.sql, -Djosm.restart=true, -Djosm.dir.name=JOSM-latest, -Djava.net.useSystemProxies=true]

Plugins:
+ FastDraw (35640)
+ HouseNumberTaggingTool (35640)
+ MicrosoftStreetside (35248)
+ OpeningHoursEditor (35640)
+ RoadSigns (35640)
+ SimplifyArea (35640)
+ apache-commons (35524)
+ apache-http (35589)
+ buildings_tools (35669)
+ contourmerge (v0.1.6)
+ imagery-xml-bounds (35723)
+ imagery_offset_db (35640)
+ javafx-unixoid (35655)
+ jna (35662)
+ pbf (35720)
+ poly (35640)
+ public_transport (35640)
+ reltoolbox (35640)
+ reverter (35732)
+ terracer (35640)
+ turnrestrictions (35640)
+ utilsplugin2 (35691)
+ wikipedia (1.1.4)

Tagging presets:
+ https://josm.openstreetmap.de/josmfile?page=Presets/OneClick&zip=1
+ https://josm.openstreetmap.de/josmfile?page=Presets/LaneAttributes&preset&zip=1

Map paint styles:
+ https://josm.openstreetmap.de/josmfile?page=Styles/Lane_and_Road_Attributes&zip=1
+ https://josm.openstreetmap.de/josmfile?page=Styles/Maxspeed&style&zip=1

Last errors/warnings:
- 00001.722 E: java.lang.UnsatisfiedLinkError: <josm.pref>/plugins/javafx/libavplugin-ffmpeg-57.so: libgstreamer-lite.so: Kann die Shared-Object-Datei nicht öffnen: Datei oder Verzeichnis nicht gefunden
- 00001.760 E: java.lang.UnsatisfiedLinkError: <josm.pref>/plugins/javafx/libavplugin-57.so: libgstreamer-lite.so: Kann die Shared-Object-Datei nicht öffnen: Datei oder Verzeichnis nicht gefunden
- 00001.762 E: java.lang.UnsatisfiedLinkError: <josm.pref>/plugins/javafx/libavplugin-54.so: libgstreamer-lite.so: Kann die Shared-Object-Datei nicht öffnen: Datei oder Verzeichnis nicht gefunden
- 00001.764 E: java.lang.UnsatisfiedLinkError: <josm.pref>/plugins/javafx/libavplugin-ffmpeg-56.so: libgstreamer-lite.so: Kann die Shared-Object-Datei nicht öffnen: Datei oder Verzeichnis nicht gefunden
- 00001.790 E: java.lang.UnsatisfiedLinkError: <josm.pref>/plugins/javafx/libavplugin-56.so: libavcodec.so.56: Kann die Shared-Object-Datei nicht öffnen: Datei oder Verzeichnis nicht gefunden

[skyper]

Closed as duplicate of #19305.