Unable to build MTPlayer docker container

[cc13com]

Hello,

I'm using your JDownloader docker container a while and I'm happy. Now I tried to implement my own container based on your baseimage to run MTPlayer, Java-File.

The dockerfile loads jlesage/baseimage-gui:alpine-3.9-glibc-v3.5.2, install openjdk11, download MTPlayer and try to start MTPlayer:

`
FROM jlesage/baseimage-gui:alpine-3.9-glibc-v3.5.2

ARG DOCKER_IMAGE_VERSION=unknown

ARG MTPLAYER_URL=https://www.p2tools.de/extra/download/MTPlayer-9.zip

WORKDIR /tmp

RUN \
    add-pkg --virtual build-dependencies curl p7zip && \
    curl -# -L -o MTPlayer-9.zip ${MTPLAYER_URL} && \
    7za x MTPlayer-9.zip && \
    del-pkg build-dependencies

RUN \
    apk --no-cache add openjdk11 --repository=http://dl-cdn.alpinelinux.org/alpine/edge/community
    
COPY rootfs/ /

WORKDIR /tmp/MTPlayer

ENV APP_NAME="MTPlayer" \
    S6_KILL_GRACETIME=8000

VOLUME ["/config"]
VOLUME ["/output"]`

I know there is a lot of optimization (e.g. volumes), but I tried first to run the app and after I will make it nice.

In rootfs there is a file called startapp.sh with the following lines:

#!/bin/sh
java -Djava.awt.headless=false -jar ./MTPlayer.jar "$@"

I build the image with docker build -t mtplayer . and the build-process-output looks fine. When I try to start the container with

docker run -it -p 5800:5800 mtplayer

I get the following error:

[12:59:59] INFO:         Proxy Authentication: not configured
Exception in thread "main" java.lang.UnsupportedOperationException: Unable to open DISPLAY
        at com.sun.glass.ui.gtk.GtkApplication.lambda$new$6(GtkApplication.java:173)
        at java.base/java.security.AccessController.doPrivileged(Native Method)
        at com.sun.glass.ui.gtk.GtkApplication.<init>(GtkApplication.java:171)
        at com.sun.glass.ui.gtk.GtkPlatformFactory.createApplication(GtkPlatformFactory.java:41)
        at com.sun.glass.ui.Application.run(Application.java:144)
        at com.sun.javafx.tk.quantum.QuantumToolkit.startup(QuantumToolkit.java:258)
        at com.sun.javafx.application.PlatformImpl.startup(PlatformImpl.java:269)
        at com.sun.javafx.application.PlatformImpl.startup(PlatformImpl.java:158)
        at com.sun.javafx.application.LauncherImpl.startToolkit(LauncherImpl.java:658)
        at com.sun.javafx.application.LauncherImpl.launchApplication1(LauncherImpl.java:678)
        at com.sun.javafx.application.LauncherImpl.lambda$launchApplication$2(LauncherImpl.java:195)
        at java.base/java.lang.Thread.run(Thread.java:834)

Any idea how I can solve this please?

Carsten