Re: Qt 5.14 / Ubuntu 18.04 QMediaPlayer Welcome Example Application long start up time

[Shazter]

I have some questions, because I'm not familiar with gestreamer, Linux and Qt. Until now I used Windows 10, but I have to move my Application to Linux.

1. Which version I have to use of gstreamer 0.1 or 1.0 for Qt 5.12.6 and Qt5.14.0 ?
2. Is this a valid way to test gstreamer without Qt? open terminal and enter gst-launch-1.0 playbin uri=file:///path/to/file/video.mpg
3. Here is mentioned to set the environment variable QT_DEBUG_PLUGINS=1, but I'm not sure do they mean in pro file ? Or via Linux terminal export QT_DEBUG_PLUGINS=1 ? If I have to set in terminal, then is valid for all applications? i know from yocto bitbake if i'm source the environment , then is only valid for the terminal window which the script was started.

[SGaist]

Hi,

1. 1.0
2. Yes it its
3. Environment variable => in your terminal. The export will only be valid in the terminal you called it in. Yes it is valid for all the application using Qt you will start from this specific terminal.

[Shazter]

@SGaist

1. Looks like 1.0 installed based on this information from dpkg -l | grep gstreamer

ii  gir1.2-gstreamer-1.0:amd64                 1.14.5-0ubuntu1~18.04.1                         amd64        GObject introspection data for the GStreamer library
ii  gstreamer1.0-alsa:amd64                    1.14.5-0ubuntu1~18.04.1                         amd64        GStreamer plugin for ALSA
ii  gstreamer1.0-clutter-3.0:amd64             3.0.26-1                                        amd64        Clutter PLugin for GStreamer 1.0
ii  gstreamer1.0-fluendo-mp3:amd64             0.10.32.debian-1                                amd64        Fluendo mp3 decoder GStreamer 1.0 plugin
ii  gstreamer1.0-gl:amd64                      1.14.5-0ubuntu1~18.04.1                         amd64        GStreamer plugins for GL
ii  gstreamer1.0-libav:amd64                   1.14.5-0ubuntu1~18.04.1                         amd64        libav plugin for GStreamer
ii  gstreamer1.0-packagekit                    1.1.9-1ubuntu2.18.04.5                          amd64        GStreamer plugin to install codecs using PackageKit
ii  gstreamer1.0-plugins-base:amd64            1.14.5-0ubuntu1~18.04.1                         amd64        GStreamer plugins from the "base" set
ii  gstreamer1.0-plugins-base-apps             1.14.5-0ubuntu1~18.04.1                         amd64        GStreamer helper programs from the "base" set
ii  gstreamer1.0-plugins-good:amd64            1.14.5-0ubuntu1~18.04.1                         amd64        GStreamer plugins from the "good" set
ii  gstreamer1.0-plugins-ugly:amd64            1.14.5-0ubuntu1~18.04.1                         amd64        GStreamer plugins from the "ugly" set
ii  gstreamer1.0-pulseaudio:amd64              1.14.5-0ubuntu1~18.04.1                         amd64        GStreamer plugin for PulseAudio
ii  gstreamer1.0-tools                         1.14.5-0ubuntu1~18.04.1                         amd64        Tools for use with GStreamer
ii  gstreamer1.0-vaapi:amd64                   1.14.5-0ubuntu1~ubuntu18.04.1                   amd64        VA-API plugins for GStreamer
ii  gstreamer1.0-x:amd64                       1.14.5-0ubuntu1~18.04.1                         amd64        GStreamer plugins for X11 and Pango
ii  libgstreamer-gl1.0-0:amd64                 1.14.5-0ubuntu1~18.04.1                         amd64        GStreamer GL libraries
ii  libgstreamer-plugins-bad1.0-0:amd64        1.14.5-0ubuntu1~18.04.1                         amd64        GStreamer libraries from the "bad" set
ii  libgstreamer-plugins-base1.0-0:amd64       1.14.5-0ubuntu1~18.04.1                         amd64        GStreamer libraries from the "base" set
ii  libgstreamer-plugins-good1.0-0:amd64       1.14.5-0ubuntu1~18.04.1                         amd64        GStreamer development files for libraries from the "good" set
ii  libgstreamer1.0-0:amd64                    1.14.5-0ubuntu1~18.04.1                         amd64        Core GStreamer libraries and elements
ii  libreoffice-avmedia-backend-gstreamer      1:6.0.7-0ubuntu0.18.04.10                       amd64        GStreamer backend for LibreOffice

2. gst-launch-1.0 playbin uri=http://mp3.planetradio.de/planetradio/hqlivestream.mp3 takes <1 sec then playback begins

I made following :

mylinuxpc@mylinuxpc-Main:~/Qt/5.14.0/gcc_64/plugins/mediaservice$ ldd libgstmediaplayer.so
	linux-vdso.so.1 (0x00007ffc3fdd6000)
	libQt5MultimediaGstTools.so.5 => /home/mylinuxpc/Qt/5.14.0/gcc_64/plugins/mediaservice/./../../lib/libQt5MultimediaGstTools.so.5 (0x00007ffb7d80e000)
	libQt5MultimediaWidgets.so.5 => /home/mylinuxpc/Qt/5.14.0/gcc_64/plugins/mediaservice/./../../lib/libQt5MultimediaWidgets.so.5 (0x00007ffb7d5f0000)
	libQt5Multimedia.so.5 => /home/mylinuxpc/Qt/5.14.0/gcc_64/plugins/mediaservice/./../../lib/libQt5Multimedia.so.5 (0x00007ffb7d2df000)
	libQt5Widgets.so.5 => /home/mylinuxpc/Qt/5.14.0/gcc_64/plugins/mediaservice/./../../lib/libQt5Widgets.so.5 (0x00007ffb7ca81000)
	libQt5Gui.so.5 => /home/mylinuxpc/Qt/5.14.0/gcc_64/plugins/mediaservice/./../../lib/libQt5Gui.so.5 (0x00007ffb7c16e000)
	libQt5Network.so.5 => /home/mylinuxpc/Qt/5.14.0/gcc_64/plugins/mediaservice/./../../lib/libQt5Network.so.5 (0x00007ffb7bdc2000)
	libQt5Core.so.5 => /home/mylinuxpc/Qt/5.14.0/gcc_64/plugins/mediaservice/./../../lib/libQt5Core.so.5 (0x00007ffb7b5eb000)
	libGL.so.1 => /usr/lib/x86_64-linux-gnu/libGL.so.1 (0x00007ffb7b35f000)
	libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007ffb7b140000)
	libgstapp-1.0.so.0 => /usr/lib/x86_64-linux-gnu/libgstapp-1.0.so.0 (0x00007ffb7af31000)
	libgstaudio-1.0.so.0 => /usr/lib/x86_64-linux-gnu/libgstaudio-1.0.so.0 (0x00007ffb7acbc000)
	libgstvideo-1.0.so.0 => /usr/lib/x86_64-linux-gnu/libgstvideo-1.0.so.0 (0x00007ffb7aa23000)
	libgstbase-1.0.so.0 => /usr/lib/x86_64-linux-gnu/libgstbase-1.0.so.0 (0x00007ffb7a7ae000)
	libgstpbutils-1.0.so.0 => /usr/lib/x86_64-linux-gnu/libgstpbutils-1.0.so.0 (0x00007ffb7a576000)
	libgstreamer-1.0.so.0 => /usr/lib/x86_64-linux-gnu/libgstreamer-1.0.so.0 (0x00007ffb7a23b000)
	libgobject-2.0.so.0 => /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0 (0x00007ffb79fe7000)
	libasound.so.2 => /usr/lib/x86_64-linux-gnu/libasound.so.2 (0x00007ffb79ce0000)
	libpulse-mainloop-glib.so.0 => /usr/lib/x86_64-linux-gnu/libpulse-mainloop-glib.so.0 (0x00007ffb79adb000)
	libpulse.so.0 => /usr/lib/x86_64-linux-gnu/libpulse.so.0 (0x00007ffb7988b000)
	libglib-2.0.so.0 => /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0 (0x00007ffb79574000)
	libstdc++.so.6 => /usr/lib/x86_64-linux-gnu/libstdc++.so.6 (0x00007ffb791eb000)
	libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007ffb78e4d000)
	libgcc_s.so.1 => /lib/x86_64-linux-gnu/libgcc_s.so.1 (0x00007ffb78c35000)
	libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007ffb78844000)
	libQt5OpenGL.so.5 => /home/mylinuxpc/Qt/5.14.0/gcc_64/plugins/mediaservice/./../../lib/libQt5OpenGL.so.5 (0x00007ffb785ed000)
	libz.so.1 => /lib/x86_64-linux-gnu/libz.so.1 (0x00007ffb783d0000)
	libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007ffb781cc000)
	libgssapi_krb5.so.2 => /usr/lib/x86_64-linux-gnu/libgssapi_krb5.so.2 (0x00007ffb77f81000)
	libicui18n.so.56 => /home/mylinuxpc/Qt/5.14.0/gcc_64/plugins/mediaservice/./../../lib/libicui18n.so.56 (0x00007ffb77ae8000)
	libicuuc.so.56 => /home/mylinuxpc/Qt/5.14.0/gcc_64/plugins/mediaservice/./../../lib/libicuuc.so.56 (0x00007ffb77730000)
	libicudata.so.56 => /home/mylinuxpc/Qt/5.14.0/gcc_64/plugins/mediaservice/./../../lib/libicudata.so.56 (0x00007ffb75d4d000)
	libgthread-2.0.so.0 => /usr/lib/x86_64-linux-gnu/libgthread-2.0.so.0 (0x00007ffb75b4b000)
	/lib64/ld-linux-x86-64.so.2 (0x00007ffb7dc74000)
	libGLX.so.0 => /usr/lib/x86_64-linux-gnu/libGLX.so.0 (0x00007ffb7591a000)
	libGLdispatch.so.0 => /usr/lib/x86_64-linux-gnu/libGLdispatch.so.0 (0x00007ffb75664000)
	libgsttag-1.0.so.0 => /usr/lib/x86_64-linux-gnu/libgsttag-1.0.so.0 (0x00007ffb75429000)
	liborc-0.4.so.0 => /usr/lib/x86_64-linux-gnu/liborc-0.4.so.0 (0x00007ffb751ad000)
	libgmodule-2.0.so.0 => /usr/lib/x86_64-linux-gnu/libgmodule-2.0.so.0 (0x00007ffb74fa9000)
	librt.so.1 => /lib/x86_64-linux-gnu/librt.so.1 (0x00007ffb74da1000)
	libffi.so.6 => /usr/lib/x86_64-linux-gnu/libffi.so.6 (0x00007ffb74b99000)
	libpulsecommon-11.1.so => /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-11.1.so (0x00007ffb7491b000)
	libdbus-1.so.3 => /lib/x86_64-linux-gnu/libdbus-1.so.3 (0x00007ffb746ce000)
	libpcre.so.3 => /lib/x86_64-linux-gnu/libpcre.so.3 (0x00007ffb7445c000)
	libkrb5.so.3 => /usr/lib/x86_64-linux-gnu/libkrb5.so.3 (0x00007ffb74186000)
	libk5crypto.so.3 => /usr/lib/x86_64-linux-gnu/libk5crypto.so.3 (0x00007ffb73f54000)
	libcom_err.so.2 => /lib/x86_64-linux-gnu/libcom_err.so.2 (0x00007ffb73d50000)
	libkrb5support.so.0 => /usr/lib/x86_64-linux-gnu/libkrb5support.so.0 (0x00007ffb73b45000)
	libX11.so.6 => /usr/lib/x86_64-linux-gnu/libX11.so.6 (0x00007ffb7380d000)
	libxcb.so.1 => /usr/lib/x86_64-linux-gnu/libxcb.so.1 (0x00007ffb735e5000)
	libsystemd.so.0 => /lib/x86_64-linux-gnu/libsystemd.so.0 (0x00007ffb73361000)
	libwrap.so.0 => /lib/x86_64-linux-gnu/libwrap.so.0 (0x00007ffb73157000)
	libsndfile.so.1 => /usr/lib/x86_64-linux-gnu/libsndfile.so.1 (0x00007ffb72ede000)
	libasyncns.so.0 => /usr/lib/x86_64-linux-gnu/libasyncns.so.0 (0x00007ffb72cd8000)
	libkeyutils.so.1 => /lib/x86_64-linux-gnu/libkeyutils.so.1 (0x00007ffb72ad4000)
	libresolv.so.2 => /lib/x86_64-linux-gnu/libresolv.so.2 (0x00007ffb728b9000)
	libXau.so.6 => /usr/lib/x86_64-linux-gnu/libXau.so.6 (0x00007ffb726b5000)
	libXdmcp.so.6 => /usr/lib/x86_64-linux-gnu/libXdmcp.so.6 (0x00007ffb724af000)
	liblzma.so.5 => /lib/x86_64-linux-gnu/liblzma.so.5 (0x00007ffb72289000)
	liblz4.so.1 => /usr/lib/x86_64-linux-gnu/liblz4.so.1 (0x00007ffb7206d000)
	libgcrypt.so.20 => /lib/x86_64-linux-gnu/libgcrypt.so.20 (0x00007ffb71d52000)
	libnsl.so.1 => /lib/x86_64-linux-gnu/libnsl.so.1 (0x00007ffb71b38000)
	libFLAC.so.8 => /usr/lib/x86_64-linux-gnu/libFLAC.so.8 (0x00007ffb718c1000)
	libogg.so.0 => /usr/lib/x86_64-linux-gnu/libogg.so.0 (0x00007ffb716b8000)
	libvorbis.so.0 => /usr/lib/x86_64-linux-gnu/libvorbis.so.0 (0x00007ffb7148d000)
	libvorbisenc.so.2 => /usr/lib/x86_64-linux-gnu/libvorbisenc.so.2 (0x00007ffb711e4000)
	libbsd.so.0 => /lib/x86_64-linux-gnu/libbsd.so.0 (0x00007ffb70fcf000)
	libgpg-error.so.0 => /lib/x86_64-linux-gnu/libgpg-error.so.0 (0x00007ffb70dba000)

What I can check more to find root cause?

[Shazter]

I tried following items too:

1. Reinstall gstreamer with

sudo apt-get install --reinstall gstreamer1.0-alsa gstreamer1.0-libav gstreamer1.0-plugins-bad gstreamer1.0-plugins-base gstreamer1.0-plugins-good gstreamer1.0-plugins-ugly gstreamer1.0-pulseaudio libgstreamer-plugins-bad1.0-0 libgstreamer-plugins-base1.0-0 libgstreamer-plugins-good1.0-0 libgstreamer1.0-0 gstreamer1.0-tool

2. gst-launch-1.0 playbin uri=http://mp3.planetradio.de/planetradio/hqlivestream.mp3 takes <1 sec then playback begins

3. Build again Example Application "Media Player Example" with Qt5.14.0 GCC-64Bit --> Start up time of MainWindow takes >3 min

4. Build Example Application "Media Player Example" with Qt5.12.6 GCC-64Bit --> Start up time of MainWindow takes >3 min

Question:

Does somebody encounters same problem with Ubuntu 18.04, same Qt + Compiler and the example application welcome-->Media Player Example?

[Shazter]

Today I organized other PC with Ubuntu 18.04.3 LTS and installed Qt 5.14.0. I compiled the Example Application "Media Player Example" with GCC 64-Bit Qt5.14.0. Start-up time was <1 sec, means for some reason my first PC, Ubuntu installation or Qt Installation has problems. I have no clue what is the root cause for this behavior on my PC. I will format my hard disk with Linux installation and will new install Ubuntu + Qt, but this will take some time, because this hard disk, PC and Ubuntu installation is used for Linux yocto builds.

[SGaist]

Re-try your test using your distribution provided Qt to see if there's any difference before formatting everything.