Unable to execute the player example after a fresh install
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Dear all,
I've created a virtual machine with a fresh install of Ubuntu 14.04.5 LTS (Trusty Tahr), then I've installed Qt 5.8. My arch is x64.When I try to execute the /home/user/Qt/Examples/Qt-5.8/multimediawidgets/player example (simple audio/video player) I've got the following error:
defaultServiceProvider::requestService(): no service found for - "org.qt-project.qt.mediaplayer"I've launched the application with the variable QT_DEBUG_PLUGINS=1 and seen that:
Got keys from plugin meta data ("gstreamermediaplayer") QFactoryLoader::QFactoryLoader() checking directory path "/home/user/QtWorkspace/bin/mediaservice" ... Cannot load library /home/user/Qt/5.8/gcc_64/plugins/mediaservice/libgstmediaplayer.so: (/home/user/Qt/5.8/gcc_64/plugins/mediaservice/../../lib/libqgsttools_p.so.1: undefined symbol: _gst_value_list_type) QLibraryPrivate::loadPlugin failed on "/home/user/Qt/5.8/gcc_64/plugins/mediaservice/libgstmediaplayer.so" : "Cannot load library /home/user/Qt/5.8/gcc_64/plugins/mediaservice/libgstmediaplayer.so: (/home/user/Qt/5.8/gcc_64/plugins/mediaservice/../../lib/libqgsttools_p.so.1: undefined symbol: _gst_value_list_type)" defaultServiceProvider::requestService(): no service found for - "org.qt-project.qt.mediaplayer"What is the cause of the "libqgsttools_p.so.1: undefined symbol: _gst_value_list_type" error? Why this mismatch?
Is it possible that am I missing some GStreamer libraries?
Ubuntu 14.04.5 LTS (Trusty Tahr) comes with GStreamer 1.0 installed (1.2.4). Is it possible that QtMultimedia does not support it?
Do I need to install GStreamer 0.1?
How can I fix this problem and run the player example?
Thanks in advance for your time
Best regards,
Fabio -
It seems that all dependencies are satisfied:
user@user-VirtualBox:~/Qt/5.8/gcc_64/lib$ ldd /home/user/Qt/5.8/gcc_64/plugins/mediaservice/libgstmediaplayer.so linux-vdso.so.1 => (0x00007fffe09d1000) libqgsttools_p.so.1 => /home/user/Qt/5.8/gcc_64/plugins/mediaservice/../../lib/libqgsttools_p.so.1 (0x00007f49fb0fd000) libQt5MultimediaWidgets.so.5 => /home/user/Qt/5.8/gcc_64/plugins/mediaservice/../../lib/libQt5MultimediaWidgets.so.5 (0x00007f49faede000) libQt5Multimedia.so.5 => /home/user/Qt/5.8/gcc_64/plugins/mediaservice/../../lib/libQt5Multimedia.so.5 (0x00007f49fabd4000) libQt5Widgets.so.5 => /home/user/Qt/5.8/gcc_64/plugins/mediaservice/../../lib/libQt5Widgets.so.5 (0x00007f49fa3a3000) libQt5Gui.so.5 => /home/user/Qt/5.8/gcc_64/plugins/mediaservice/../../lib/libQt5Gui.so.5 (0x00007f49f9c07000) libQt5Network.so.5 => /home/user/Qt/5.8/gcc_64/plugins/mediaservice/../../lib/libQt5Network.so.5 (0x00007f49f9881000) libQt5Core.so.5 => /home/user/Qt/5.8/gcc_64/plugins/mediaservice/../../lib/libQt5Core.so.5 (0x00007f49f9161000) libGL.so.1 => /usr/lib/x86_64-linux-gnu/mesa/libGL.so.1 (0x00007f49f8ee0000) libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007f49f8cc1000) libgstaudio-1.0.so.0 => /usr/lib/x86_64-linux-gnu/libgstaudio-1.0.so.0 (0x00007f49f8a77000) libgstvideo-1.0.so.0 => /usr/lib/x86_64-linux-gnu/libgstvideo-1.0.so.0 (0x00007f49f8831000) libgstpbutils-1.0.so.0 => /usr/lib/x86_64-linux-gnu/libgstpbutils-1.0.so.0 (0x00007f49f860a000) libgstapp-1.0.so.0 => /usr/lib/x86_64-linux-gnu/libgstapp-1.0.so.0 (0x00007f49f83fd000) libgstbase-1.0.so.0 => /usr/lib/x86_64-linux-gnu/libgstbase-1.0.so.0 (0x00007f49f81a5000) libgstreamer-1.0.so.0 => /usr/lib/x86_64-linux-gnu/libgstreamer-1.0.so.0 (0x00007f49f7ea0000) libgobject-2.0.so.0 => /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0 (0x00007f49f7c4f000) libpulse-mainloop-glib.so.0 => /usr/lib/x86_64-linux-gnu/libpulse-mainloop-glib.so.0 (0x00007f49f7a4a000) libpulse.so.0 => /usr/lib/x86_64-linux-gnu/libpulse.so.0 (0x00007f49f7800000) libglib-2.0.so.0 => /lib/x86_64-linux-gnu/libglib-2.0.so.0 (0x00007f49f74f8000) libstdc++.so.6 => /usr/lib/x86_64-linux-gnu/libstdc++.so.6 (0x00007f49f71f4000) libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007f49f6eed000) libgcc_s.so.1 => /lib/x86_64-linux-gnu/libgcc_s.so.1 (0x00007f49f6cd7000) libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f49f6912000) libasound.so.2 => /usr/lib/x86_64-linux-gnu/libasound.so.2 (0x00007f49f6621000) libQt5OpenGL.so.5 => /home/user/Qt/5.8/gcc_64/plugins/mediaservice/../../lib/libQt5OpenGL.so.5 (0x00007f49f63ca000) libz.so.1 => /lib/x86_64-linux-gnu/libz.so.1 (0x00007f49f61b0000) libicui18n.so.56 => /home/user/Qt/5.8/gcc_64/plugins/mediaservice/../../lib/libicui18n.so.56 (0x00007f49f5d17000) libicuuc.so.56 => /home/user/Qt/5.8/gcc_64/plugins/mediaservice/../../lib/libicuuc.so.56 (0x00007f49f595e000) libicudata.so.56 => /home/user/Qt/5.8/gcc_64/plugins/mediaservice/../../lib/libicudata.so.56 (0x00007f49f3f7b000) libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007f49f3d77000) librt.so.1 => /lib/x86_64-linux-gnu/librt.so.1 (0x00007f49f3b6e000) libgthread-2.0.so.0 => /usr/lib/x86_64-linux-gnu/libgthread-2.0.so.0 (0x00007f49f396c000) /lib64/ld-linux-x86-64.so.2 (0x000055daf79ac000) libexpat.so.1 => /lib/x86_64-linux-gnu/libexpat.so.1 (0x00007f49f3742000) libxcb-dri3.so.0 => /usr/lib/x86_64-linux-gnu/libxcb-dri3.so.0 (0x00007f49f353e000) libxcb-present.so.0 => /usr/lib/x86_64-linux-gnu/libxcb-present.so.0 (0x00007f49f333b000) libxcb-sync.so.1 => /usr/lib/x86_64-linux-gnu/libxcb-sync.so.1 (0x00007f49f3135000) libxshmfence.so.1 => /usr/lib/x86_64-linux-gnu/libxshmfence.so.1 (0x00007f49f2f32000) libglapi.so.0 => /usr/lib/x86_64-linux-gnu/libglapi.so.0 (0x00007f49f2d04000) libXext.so.6 => /usr/lib/x86_64-linux-gnu/libXext.so.6 (0x00007f49f2af2000) libXdamage.so.1 => /usr/lib/x86_64-linux-gnu/libXdamage.so.1 (0x00007f49f28ee000) libXfixes.so.3 => /usr/lib/x86_64-linux-gnu/libXfixes.so.3 (0x00007f49f26e8000) libX11-xcb.so.1 => /usr/lib/x86_64-linux-gnu/libX11-xcb.so.1 (0x00007f49f24e6000) libX11.so.6 => /usr/lib/x86_64-linux-gnu/libX11.so.6 (0x00007f49f21b0000) libxcb-glx.so.0 => /usr/lib/x86_64-linux-gnu/libxcb-glx.so.0 (0x00007f49f1f99000) libxcb-dri2.so.0 => /usr/lib/x86_64-linux-gnu/libxcb-dri2.so.0 (0x00007f49f1d94000) libxcb.so.1 => /usr/lib/x86_64-linux-gnu/libxcb.so.1 (0x00007f49f1b74000) libXxf86vm.so.1 => /usr/lib/x86_64-linux-gnu/libXxf86vm.so.1 (0x00007f49f196e000) libdrm.so.2 => /usr/lib/x86_64-linux-gnu/libdrm.so.2 (0x00007f49f1760000) libgsttag-1.0.so.0 => /usr/lib/x86_64-linux-gnu/libgsttag-1.0.so.0 (0x00007f49f1527000) liborc-0.4.so.0 => /usr/lib/x86_64-linux-gnu/liborc-0.4.so.0 (0x00007f49f12a5000) libgmodule-2.0.so.0 => /usr/lib/x86_64-linux-gnu/libgmodule-2.0.so.0 (0x00007f49f10a0000) libffi.so.6 => /usr/lib/x86_64-linux-gnu/libffi.so.6 (0x00007f49f0e98000) libpulsecommon-4.0.so => /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-4.0.so (0x00007f49f0c30000) libjson-c.so.2 => /lib/x86_64-linux-gnu/libjson-c.so.2 (0x00007f49f0a25000) libdbus-1.so.3 => /lib/x86_64-linux-gnu/libdbus-1.so.3 (0x00007f49f07e0000) libpcre.so.3 => /lib/x86_64-linux-gnu/libpcre.so.3 (0x00007f49f05a1000) libXau.so.6 => /usr/lib/x86_64-linux-gnu/libXau.so.6 (0x00007f49f039c000) libXdmcp.so.6 => /usr/lib/x86_64-linux-gnu/libXdmcp.so.6 (0x00007f49f0196000) libwrap.so.0 => /lib/x86_64-linux-gnu/libwrap.so.0 (0x00007f49eff8b000) libsndfile.so.1 => /usr/lib/x86_64-linux-gnu/libsndfile.so.1 (0x00007f49efd23000) libasyncns.so.0 => /usr/lib/x86_64-linux-gnu/libasyncns.so.0 (0x00007f49efb1d000) libnsl.so.1 => /lib/x86_64-linux-gnu/libnsl.so.1 (0x00007f49ef902000) libFLAC.so.8 => /usr/lib/x86_64-linux-gnu/libFLAC.so.8 (0x00007f49ef6d1000) libvorbisenc.so.2 => /usr/lib/x86_64-linux-gnu/libvorbisenc.so.2 (0x00007f49ef202000) libvorbis.so.0 => /usr/lib/x86_64-linux-gnu/libvorbis.so.0 (0x00007f49eefd4000) libogg.so.0 => /usr/lib/x86_64-linux-gnu/libogg.so.0 (0x00007f49eedcb000) libresolv.so.2 => /lib/x86_64-linux-gnu/libresolv.so.2 (0x00007f49eebb0000) -
Exactly the same problem!
same os, same qt version, and the same error ! -
It seems that all dependencies are satisfied:
user@user-VirtualBox:~/Qt/5.8/gcc_64/lib$ ldd /home/user/Qt/5.8/gcc_64/plugins/mediaservice/libgstmediaplayer.so linux-vdso.so.1 => (0x00007fffe09d1000) libqgsttools_p.so.1 => /home/user/Qt/5.8/gcc_64/plugins/mediaservice/../../lib/libqgsttools_p.so.1 (0x00007f49fb0fd000) libQt5MultimediaWidgets.so.5 => /home/user/Qt/5.8/gcc_64/plugins/mediaservice/../../lib/libQt5MultimediaWidgets.so.5 (0x00007f49faede000) libQt5Multimedia.so.5 => /home/user/Qt/5.8/gcc_64/plugins/mediaservice/../../lib/libQt5Multimedia.so.5 (0x00007f49fabd4000) libQt5Widgets.so.5 => /home/user/Qt/5.8/gcc_64/plugins/mediaservice/../../lib/libQt5Widgets.so.5 (0x00007f49fa3a3000) libQt5Gui.so.5 => /home/user/Qt/5.8/gcc_64/plugins/mediaservice/../../lib/libQt5Gui.so.5 (0x00007f49f9c07000) libQt5Network.so.5 => /home/user/Qt/5.8/gcc_64/plugins/mediaservice/../../lib/libQt5Network.so.5 (0x00007f49f9881000) libQt5Core.so.5 => /home/user/Qt/5.8/gcc_64/plugins/mediaservice/../../lib/libQt5Core.so.5 (0x00007f49f9161000) libGL.so.1 => /usr/lib/x86_64-linux-gnu/mesa/libGL.so.1 (0x00007f49f8ee0000) libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007f49f8cc1000) libgstaudio-1.0.so.0 => /usr/lib/x86_64-linux-gnu/libgstaudio-1.0.so.0 (0x00007f49f8a77000) libgstvideo-1.0.so.0 => /usr/lib/x86_64-linux-gnu/libgstvideo-1.0.so.0 (0x00007f49f8831000) libgstpbutils-1.0.so.0 => /usr/lib/x86_64-linux-gnu/libgstpbutils-1.0.so.0 (0x00007f49f860a000) libgstapp-1.0.so.0 => /usr/lib/x86_64-linux-gnu/libgstapp-1.0.so.0 (0x00007f49f83fd000) libgstbase-1.0.so.0 => /usr/lib/x86_64-linux-gnu/libgstbase-1.0.so.0 (0x00007f49f81a5000) libgstreamer-1.0.so.0 => /usr/lib/x86_64-linux-gnu/libgstreamer-1.0.so.0 (0x00007f49f7ea0000) libgobject-2.0.so.0 => /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0 (0x00007f49f7c4f000) libpulse-mainloop-glib.so.0 => /usr/lib/x86_64-linux-gnu/libpulse-mainloop-glib.so.0 (0x00007f49f7a4a000) libpulse.so.0 => /usr/lib/x86_64-linux-gnu/libpulse.so.0 (0x00007f49f7800000) libglib-2.0.so.0 => /lib/x86_64-linux-gnu/libglib-2.0.so.0 (0x00007f49f74f8000) libstdc++.so.6 => /usr/lib/x86_64-linux-gnu/libstdc++.so.6 (0x00007f49f71f4000) libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007f49f6eed000) libgcc_s.so.1 => /lib/x86_64-linux-gnu/libgcc_s.so.1 (0x00007f49f6cd7000) libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f49f6912000) libasound.so.2 => /usr/lib/x86_64-linux-gnu/libasound.so.2 (0x00007f49f6621000) libQt5OpenGL.so.5 => /home/user/Qt/5.8/gcc_64/plugins/mediaservice/../../lib/libQt5OpenGL.so.5 (0x00007f49f63ca000) libz.so.1 => /lib/x86_64-linux-gnu/libz.so.1 (0x00007f49f61b0000) libicui18n.so.56 => /home/user/Qt/5.8/gcc_64/plugins/mediaservice/../../lib/libicui18n.so.56 (0x00007f49f5d17000) libicuuc.so.56 => /home/user/Qt/5.8/gcc_64/plugins/mediaservice/../../lib/libicuuc.so.56 (0x00007f49f595e000) libicudata.so.56 => /home/user/Qt/5.8/gcc_64/plugins/mediaservice/../../lib/libicudata.so.56 (0x00007f49f3f7b000) libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007f49f3d77000) librt.so.1 => /lib/x86_64-linux-gnu/librt.so.1 (0x00007f49f3b6e000) libgthread-2.0.so.0 => /usr/lib/x86_64-linux-gnu/libgthread-2.0.so.0 (0x00007f49f396c000) /lib64/ld-linux-x86-64.so.2 (0x000055daf79ac000) libexpat.so.1 => /lib/x86_64-linux-gnu/libexpat.so.1 (0x00007f49f3742000) libxcb-dri3.so.0 => /usr/lib/x86_64-linux-gnu/libxcb-dri3.so.0 (0x00007f49f353e000) libxcb-present.so.0 => /usr/lib/x86_64-linux-gnu/libxcb-present.so.0 (0x00007f49f333b000) libxcb-sync.so.1 => /usr/lib/x86_64-linux-gnu/libxcb-sync.so.1 (0x00007f49f3135000) libxshmfence.so.1 => /usr/lib/x86_64-linux-gnu/libxshmfence.so.1 (0x00007f49f2f32000) libglapi.so.0 => /usr/lib/x86_64-linux-gnu/libglapi.so.0 (0x00007f49f2d04000) libXext.so.6 => /usr/lib/x86_64-linux-gnu/libXext.so.6 (0x00007f49f2af2000) libXdamage.so.1 => /usr/lib/x86_64-linux-gnu/libXdamage.so.1 (0x00007f49f28ee000) libXfixes.so.3 => /usr/lib/x86_64-linux-gnu/libXfixes.so.3 (0x00007f49f26e8000) libX11-xcb.so.1 => /usr/lib/x86_64-linux-gnu/libX11-xcb.so.1 (0x00007f49f24e6000) libX11.so.6 => /usr/lib/x86_64-linux-gnu/libX11.so.6 (0x00007f49f21b0000) libxcb-glx.so.0 => /usr/lib/x86_64-linux-gnu/libxcb-glx.so.0 (0x00007f49f1f99000) libxcb-dri2.so.0 => /usr/lib/x86_64-linux-gnu/libxcb-dri2.so.0 (0x00007f49f1d94000) libxcb.so.1 => /usr/lib/x86_64-linux-gnu/libxcb.so.1 (0x00007f49f1b74000) libXxf86vm.so.1 => /usr/lib/x86_64-linux-gnu/libXxf86vm.so.1 (0x00007f49f196e000) libdrm.so.2 => /usr/lib/x86_64-linux-gnu/libdrm.so.2 (0x00007f49f1760000) libgsttag-1.0.so.0 => /usr/lib/x86_64-linux-gnu/libgsttag-1.0.so.0 (0x00007f49f1527000) liborc-0.4.so.0 => /usr/lib/x86_64-linux-gnu/liborc-0.4.so.0 (0x00007f49f12a5000) libgmodule-2.0.so.0 => /usr/lib/x86_64-linux-gnu/libgmodule-2.0.so.0 (0x00007f49f10a0000) libffi.so.6 => /usr/lib/x86_64-linux-gnu/libffi.so.6 (0x00007f49f0e98000) libpulsecommon-4.0.so => /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-4.0.so (0x00007f49f0c30000) libjson-c.so.2 => /lib/x86_64-linux-gnu/libjson-c.so.2 (0x00007f49f0a25000) libdbus-1.so.3 => /lib/x86_64-linux-gnu/libdbus-1.so.3 (0x00007f49f07e0000) libpcre.so.3 => /lib/x86_64-linux-gnu/libpcre.so.3 (0x00007f49f05a1000) libXau.so.6 => /usr/lib/x86_64-linux-gnu/libXau.so.6 (0x00007f49f039c000) libXdmcp.so.6 => /usr/lib/x86_64-linux-gnu/libXdmcp.so.6 (0x00007f49f0196000) libwrap.so.0 => /lib/x86_64-linux-gnu/libwrap.so.0 (0x00007f49eff8b000) libsndfile.so.1 => /usr/lib/x86_64-linux-gnu/libsndfile.so.1 (0x00007f49efd23000) libasyncns.so.0 => /usr/lib/x86_64-linux-gnu/libasyncns.so.0 (0x00007f49efb1d000) libnsl.so.1 => /lib/x86_64-linux-gnu/libnsl.so.1 (0x00007f49ef902000) libFLAC.so.8 => /usr/lib/x86_64-linux-gnu/libFLAC.so.8 (0x00007f49ef6d1000) libvorbisenc.so.2 => /usr/lib/x86_64-linux-gnu/libvorbisenc.so.2 (0x00007f49ef202000) libvorbis.so.0 => /usr/lib/x86_64-linux-gnu/libvorbis.so.0 (0x00007f49eefd4000) libogg.so.0 => /usr/lib/x86_64-linux-gnu/libogg.so.0 (0x00007f49eedcb000) libresolv.so.2 => /lib/x86_64-linux-gnu/libresolv.so.2 (0x00007f49eebb0000)@Grynium did u solve the problem?
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Exactly the same problem!
same os, same qt version, and the same error !@rickywong2017 the same to me ,did u solve this problem?
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@rickywong2017 the same to me ,did u solve this problem?
@ed_u the sad thing is not, i've changed the qt version to Qt5.6.2 and this error simply just dont happen.
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Solution for Qt 5.8.0 on Ubuntu 14.04
This is basically the error:
Cannot load library /home/massimo/projects/Qt5.8.0/5.8/gcc_64/plugins/mediaservice/libgstmediaplayer.so: (/home/massimo/projects/Qt5.8.0/5.8/gcc_64/plugins/mediaservice/../../lib/libqgsttools_p.so.1: undefined symbol: _gst_value_list_type)Which means the Qt Multimedia team didn't consider the gstreamer version shipping on Ubuntu 14.04 which is 1.2.3.
To solve you need to update GST with a PPA. Seems 1.6.x is enough to make Qt happy.sudo add-apt-repository ppa:dan-witt/gstreamer sudo apt-get update sudo apt-get upgradeFootnote: 14.04 is a LTS version and Qt didn't care. This is horrible and bad decision making IMHO.
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@mcallegari79 If you want LTS everywhere then Qt 5.6 is the current LTS not 5.8.
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@ed_u the sad thing is not, i've changed the qt version to Qt5.6.2 and this error simply just dont happen.
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@rickywong2017 Why i still got that error when running the example on 5.6.2 :((
I am newbie. Sorry if my question is noob.
Can anyone tell me how to launched the application with the variable QT_DEBUG_PLUGINS=1 -
@tamolo In the command line:
$ QT_DEBUG_PLUGINS=1 $ ./my_appOr in QtCreator set this variable in "Projects/Run/Run Environment/Add".
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@Grynium @rickywong2017
This is the way i fixed it.
Step 1: use 'apt-cache search -n gstreamer' to get the list all of the gstreamer and libgstream lib
Step 2: for each of lib in the list. Use 'apt-get install name-of-the-gstreamer-lib' to install it. After install almost the lib in the list my example run. ( i don't know which is the exactly lib i need to install. I just install all of them until my example run)
Step 3: rebuild your example and run.I hope this help.
