The QMediaPlayer object does not have a valid service

[SGaist]

Start your application with QT_DEBUG_PLUGINS environment set to 1, you'll have more information about what is failing.

[Marc_Van_Daele]

I see (parts of log omitted). I guess at the end is the relevant error

QFactoryLoader::QFactoryLoader() looking at "/home/seppe/Qt/5.11.1/gcc_64/plugins/platforms/libqeglfs.so.debug"
"The shared library was not found." 

QFactoryLoader::QFactoryLoader() looking at "/home/seppe/Qt/5.11.1/gcc_64/plugins/platforms/libqlinuxfb.so.debug"
"The shared library was not found." 

QFactoryLoader::QFactoryLoader() looking at "/home/seppe/Qt/5.11.1/gcc_64/plugins/platforms/libqminimal.so.debug"
"The shared library was not found." 

QFactoryLoader::QFactoryLoader() looking at "/home/seppe/Qt/5.11.1/gcc_64/plugins/mediaservice/libgstaudiodecoder.so.debug"
"The shared library was not found." 

QFactoryLoader::QFactoryLoader() looking at "/home/seppe/Qt/5.11.1/gcc_64/plugins/mediaservice/libgstcamerabin.so.debug"
"The shared library was not found." 
         not a plugin

QFactoryLoader::QFactoryLoader() looking at "/home/seppe/Qt/5.11.1/gcc_64/plugins/mediaservice/libgstmediaplayer.so.debug"
"The shared library was not found." 

QLibraryPrivate::loadPlugin failed on "/home/seppe/Qt/5.11.1/gcc_64/plugins/mediaservice/libgstmediaplayer.so" : "Cannot load library /home/seppe/Qt/5.11.1/gcc_64/plugins/mediaservice/libgstmediaplayer.so: (/home/seppe/Qt/5.11.1/gcc_64/lib/libQt5MultimediaGstTools.so.5: undefined symbol: _gst_value_list_type)"
defaultServiceProvider::requestService(): no service found for - "org.qt-project.qt.mediaplayer"

[SGaist]

@Marc_Van_Daele said in The QMediaPlayer object does not have a valid service:

/home/seppe/Qt/5.11.1/gcc_64/lib/libQt5MultimediaGstTools.so.5

Can you run ldd on that file ?

[Marc_Van_Daele]

Here is the output of ldd /home/seppe/Qt/5.11.1/gcc_64/lib/libQt5MultimediaGstTools.so.5
I hope you can spot something suspicious in this

        linux-vdso.so.1 =>  (0x00007ffcf81e0000)
	libQt5MultimediaWidgets.so.5 => /home/seppe/Qt/5.11.1/gcc_64/lib/libQt5MultimediaWidgets.so.5 (0x00007f7fe98d4000)
	libQt5Multimedia.so.5 => /home/seppe/Qt/5.11.1/gcc_64/lib/libQt5Multimedia.so.5 (0x00007f7fe95c7000)
	libQt5Widgets.so.5 => /home/seppe/Qt/5.11.1/gcc_64/lib/libQt5Widgets.so.5 (0x00007f7fe8d83000)
	libQt5Gui.so.5 => /home/seppe/Qt/5.11.1/gcc_64/lib/libQt5Gui.so.5 (0x00007f7fe8587000)
	libQt5Network.so.5 => /home/seppe/Qt/5.11.1/gcc_64/lib/libQt5Network.so.5 (0x00007f7fe81f2000)
	libQt5Core.so.5 => /home/seppe/Qt/5.11.1/gcc_64/lib/libQt5Core.so.5 (0x00007f7fe7a98000)
	libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007f7fe787a000)
	libasound.so.2 => /usr/lib/x86_64-linux-gnu/libasound.so.2 (0x00007f7fe758a000)
	libgstaudio-1.0.so.0 => /usr/lib/x86_64-linux-gnu/libgstaudio-1.0.so.0 (0x00007f7fe7340000)
	libgstvideo-1.0.so.0 => /usr/lib/x86_64-linux-gnu/libgstvideo-1.0.so.0 (0x00007f7fe70fa000)
	libgstpbutils-1.0.so.0 => /usr/lib/x86_64-linux-gnu/libgstpbutils-1.0.so.0 (0x00007f7fe6ed4000)
	libgstapp-1.0.so.0 => /usr/lib/x86_64-linux-gnu/libgstapp-1.0.so.0 (0x00007f7fe6cc7000)
	libgstbase-1.0.so.0 => /usr/lib/x86_64-linux-gnu/libgstbase-1.0.so.0 (0x00007f7fe6a6f000)
	libgstreamer-1.0.so.0 => /usr/lib/x86_64-linux-gnu/libgstreamer-1.0.so.0 (0x00007f7fe676b000)
	libgobject-2.0.so.0 => /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0 (0x00007f7fe651a000)
	libpulse-mainloop-glib.so.0 => /usr/lib/x86_64-linux-gnu/libpulse-mainloop-glib.so.0 (0x00007f7fe6315000)
	libpulse.so.0 => /usr/lib/x86_64-linux-gnu/libpulse.so.0 (0x00007f7fe60cc000)
	libglib-2.0.so.0 => /lib/x86_64-linux-gnu/libglib-2.0.so.0 (0x00007f7fe5dc4000)
	libGL.so.1 => /usr/lib/nvidia-384/libGL.so.1 (0x00007f7fe5b20000)
	libstdc++.so.6 => /usr/lib/x86_64-linux-gnu/libstdc++.so.6 (0x00007f7fe580a000)
	libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007f7fe5504000)
	libgcc_s.so.1 => /lib/x86_64-linux-gnu/libgcc_s.so.1 (0x00007f7fe52ec000)
	libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f7fe4f23000)
	libQt5OpenGL.so.5 => /home/seppe/Qt/5.11.1/gcc_64/lib/libQt5OpenGL.so.5 (0x00007f7fe4ccc000)
	libz.so.1 => /lib/x86_64-linux-gnu/libz.so.1 (0x00007f7fe4ab3000)
	libicui18n.so.56 => /home/seppe/Qt/5.11.1/gcc_64/lib/libicui18n.so.56 (0x00007f7fe461a000)
	libicuuc.so.56 => /home/seppe/Qt/5.11.1/gcc_64/lib/libicuuc.so.56 (0x00007f7fe4262000)
	libicudata.so.56 => /home/seppe/Qt/5.11.1/gcc_64/lib/libicudata.so.56 (0x00007f7fe287f000)
	libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007f7fe267b000)
	libgthread-2.0.so.0 => /usr/lib/x86_64-linux-gnu/libgthread-2.0.so.0 (0x00007f7fe2479000)
	/lib64/ld-linux-x86-64.so.2 (0x00007f7fe9d2a000)
	librt.so.1 => /lib/x86_64-linux-gnu/librt.so.1 (0x00007f7fe2271000)
	libgsttag-1.0.so.0 => /usr/lib/x86_64-linux-gnu/libgsttag-1.0.so.0 (0x00007f7fe2039000)
	liborc-0.4.so.0 => /usr/lib/x86_64-linux-gnu/liborc-0.4.so.0 (0x00007f7fe1db7000)
	libgmodule-2.0.so.0 => /usr/lib/x86_64-linux-gnu/libgmodule-2.0.so.0 (0x00007f7fe1bb3000)
	libffi.so.6 => /usr/lib/x86_64-linux-gnu/libffi.so.6 (0x00007f7fe19ab000)
	libpulsecommon-4.0.so => /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-4.0.so (0x00007f7fe1744000)
	libjson-c.so.2 => /lib/x86_64-linux-gnu/libjson-c.so.2 (0x00007f7fe1539000)
	libdbus-1.so.3 => /lib/x86_64-linux-gnu/libdbus-1.so.3 (0x00007f7fe12f4000)
	libpcre.so.3 => /lib/x86_64-linux-gnu/libpcre.so.3 (0x00007f7fe10b6000)
	libGLX.so.0 => /usr/lib/nvidia-384/libGLX.so.0 (0x00007f7fe0e86000)
	libGLdispatch.so.0 => /usr/lib/nvidia-384/libGLdispatch.so.0 (0x00007f7fe0bb8000)
	libxcb.so.1 => /usr/lib/x86_64-linux-gnu/libxcb.so.1 (0x00007f7fe0999000)
	libwrap.so.0 => /lib/x86_64-linux-gnu/libwrap.so.0 (0x00007f7fe078f000)
	libsndfile.so.1 => /usr/lib/x86_64-linux-gnu/libsndfile.so.1 (0x00007f7fe0527000)
	libasyncns.so.0 => /usr/lib/x86_64-linux-gnu/libasyncns.so.0 (0x00007f7fe0321000)
	libX11.so.6 => /usr/lib/x86_64-linux-gnu/libX11.so.6 (0x00007f7fdffec000)
	libXext.so.6 => /usr/lib/x86_64-linux-gnu/libXext.so.6 (0x00007f7fdfdda000)
	libXau.so.6 => /usr/lib/x86_64-linux-gnu/libXau.so.6 (0x00007f7fdfbd6000)
	libXdmcp.so.6 => /usr/lib/x86_64-linux-gnu/libXdmcp.so.6 (0x00007f7fdf9d0000)
	libnsl.so.1 => /lib/x86_64-linux-gnu/libnsl.so.1 (0x00007f7fdf7b6000)
	libFLAC.so.8 => /usr/lib/x86_64-linux-gnu/libFLAC.so.8 (0x00007f7fdf585000)
	libvorbisenc.so.2 => /usr/lib/x86_64-linux-gnu/libvorbisenc.so.2 (0x00007f7fdf0b6000)
	libvorbis.so.0 => /usr/lib/x86_64-linux-gnu/libvorbis.so.0 (0x00007f7fdee89000)
	libogg.so.0 => /usr/lib/x86_64-linux-gnu/libogg.so.0 (0x00007f7fdec80000)
	libresolv.so.2 => /lib/x86_64-linux-gnu/libresolv.so.2 (0x00007f7fdea65000)

[SGaist]

Looks good indeed. Can you get the exact version that was installed by the packages manager ?

[Marc_Van_Daele]

Not sure which packages you want and how to get the corresponding info. Note that I'm running Mint 17 Qiana.
I executed the following command
apt-cache policy libqt5multimedia5 libqt5multimedia5-plugins libqt5multimediawidgets5
and this outputs

libqt5multimedia5:
  Geïnstalleerd: 5.2.1-0ubuntu5
  Kandidaat:     5.2.1-0ubuntu5
  Versietabel:
 * 5.2.1-0ubuntu5 0
        500 http://archive.ubuntu.com/ubuntu/ trusty/main amd64 Packages
        100 /var/lib/dpkg/status
libqt5multimedia5-plugins:
  Geïnstalleerd: 5.2.1-0ubuntu5
  Kandidaat:     5.2.1-0ubuntu5
  Versietabel:
 * 5.2.1-0ubuntu5 0
        500 http://archive.ubuntu.com/ubuntu/ trusty/main amd64 Packages
        100 /var/lib/dpkg/status
libqt5multimediawidgets5:
  Geïnstalleerd: 5.2.1-0ubuntu5
  Kandidaat:     5.2.1-0ubuntu5
  Versietabel:
 * 5.2.1-0ubuntu5 0
        500 http://archive.ubuntu.com/ubuntu/ trusty/main amd64 Packages
        100 /var/lib/dpkg/status
W: Ignoring Provides line with DepCompareOp for package gdb-minimal
W: Ignoring Provides line with DepCompareOp for package gdb-minimal
W: U kunt misschien 'apt-get update' uitvoeren om deze problemen te verhelpen

[SGaist]

I meant the GStreamer version.

Note that since you are running a pretty old version of your Distribution. So it might just be that your GStreamer version is too old. So you either have to rebuild the plugin for your version of GStreamer or update your distribution.

[Marc_Van_Daele]

I hope to get this fixed without updating the distribution but if all else fails, I'll have to do that indeed.

apt-cache policy gstreamer1.0-x libgstreamer1.0-0 returns the following

gstreamer1.0-x:
Geïnstalleerd: 1.2.4-1~ubuntu2.1
Kandidaat: 1.2.4-1~ubuntu2.1
Versietabel:

• 1.2.4-1~ubuntu2.1 0
  500 http://archive.ubuntu.com/ubuntu/ trusty-updates/main amd64 Packages
  500 http://security.ubuntu.com/ubuntu/ trusty-security/main amd64 Packages
  100 /var/lib/dpkg/status
  1.2.3-1 0
  500 http://archive.ubuntu.com/ubuntu/ trusty/main amd64 Packages

libgstreamer1.0-0:
Geïnstalleerd: 1.2.4-0ubuntu1.1
Kandidaat: 1.2.4-0ubuntu1.1
Versietabel:

• 1.2.4-0ubuntu1.1 0
  500 http://archive.ubuntu.com/ubuntu/ trusty-updates/main amd64 Packages
  500 http://security.ubuntu.com/ubuntu/ trusty-security/main amd64 Packages
  100 /var/lib/dpkg/status
  1.2.3-1 0
  500 http://archive.ubuntu.com/ubuntu/ trusty/main amd64 Packages
  Index of /ubuntu
  archive.ubuntu.com

[SGaist]

What do you get if you run nm -D /usr/lib/x86_64-linux-gnu/libgstreamer-1.0.so.0 | grep _gst_value_list_type ?

[Marc_Van_Daele]

The command you gave returned nothing on the Mint setup. (On my working environment, Ubuntu 16.04, it returned 00000000003289c0 B _gst_value_list_type)

Below is the output (on Mint) of a slightly modified command

seppe@Seppe-desktop ~ $ nm -D /usr/lib/x86_64-linux-gnu/libgstreamer-1.0.so.0 | grep gst_value_list
00000000000a0790 T gst_value_list_append_and_take_value
00000000000a0840 T gst_value_list_append_value
00000000000a0a40 T gst_value_list_concat
000000000009f570 T gst_value_list_get_size
000000000009f4e0 T gst_value_list_get_type
000000000009f5c0 T gst_value_list_get_value
00000000000a1fd0 T gst_value_list_merge
00000000000a0940 T gst_value_list_prepend_value
seppe@Seppe-desktop ~ $

[SGaist]

So it looks like you have to different versions of gstreamer installed on these two systems. Can you compare that ?

[Marc_Van_Daele]

On Ubuntu 16.04 I have the following.
Should I be able to install this version on Linux Mint 17?

mvandaele@nb-mvandaele:~$ apt-cache policy libgstreamer1.0-0:amd64
libgstreamer1.0-0:
  Installed: 1.8.3-1~ubuntu0.1
  Candidate: 1.8.3-1~ubuntu0.1
  Version table:
 *** 1.8.3-1~ubuntu0.1 500
        500 http://be.archive.ubuntu.com/ubuntu xenial-updates/main amd64 Packages
        100 /var/lib/dpkg/status
     1.8.0-1 500
        500 http://be.archive.ubuntu.com/ubuntu xenial/main amd64 Packages
mvandaele@nb-mvandaele:~$ 

[SGaist]

Version 1.2.4 Vs 1.8.3. That's a pretty big gap.

Your Linux Mint is pretty old. You should consider updating it. Otherwise you may want to rebuild the Qt GStreamer backend for your Mint version.

[Marc_Van_Daele]

@SGaist Can you give me a pointer on how to rebuild the Qt GStreamer?

[SGaist]

Not Qt GStreamer, the QtMultimedia module GStreamer plugin.

Download the sources from the installer.

Then:

mkdir build_Qt_multimedia
cd build_Qt_multimedia
/path/to/your/Qt/qmake /path/to/qtmultimedia/src/plugins/
make
make install

[Marc_Van_Daele]

After a long delay (sorry for that), I could finally try this
I downloaded the sources from http://ftp2.nluug.nl/languages/qt/official_releases/qt/5.11/5.11.2/single/ (since downloading from the installer was extremely slow)

Next, I ran

/home/mvandaele/Qt/5.11.2/gcc_64/bin/qmake /home/mvandaele/temp/Qt5.11.2/src/qt-everywhere-src-5.11.2/qtmultimedia/src/plugins

but running make afterwards resulted in

mvandaele@nb-mvandaele:~/temp/Qt5.11.2/build$ make
cd m3u/ && ( test -e Makefile || /home/mvandaele/Qt/5.11.2/gcc_64/bin/qmake -o Makefile /home/mvandaele/temp/Qt5.11.2/src/qt-everywhere-src-5.11.2/qtmultimedia/src/plugins/m3u/m3u.pro ) && make -f Makefile 
/home/mvandaele/Qt/5.11.2/gcc_64/mkspecs/features/qt_plugin.prf:59: Cannot write file /mkspecs/modules-inst/qt_plugin_qtmultimedia_m3u.pri: Cannot create parent directory
Makefile:48: recipe for target 'sub-m3u-make_first' failed
make: *** [sub-m3u-make_first] Error 3

Any ideas?

[SGaist]

Can you try to run qmake on the whole QtMultimedia module ? You can always only build the plugin after.

[Marc_Van_Daele]

Running QMake in the whole Multimedia module worked fine. make and make install afterwards did fix my problem! Thanks a lot for your assistance and patience. It's appreciated (a lot)
Note: running make install in src/plugins did not seem to be sufficient