video can't no play under QT5.8.0,mp3 plays well

[SGaist]

It depends on your project. You should compare them.

[JiujiuTong]

@SGaist
thank you . by the way , for my case, does it mean that the QT multimedia module has bugs?

[SGaist]

Not necessarily, you should check with the gstreamer utils if the files you are interested in can be played.

Multimedia is a complex matter and if you are missing one codec you might get errors like that one so you have to ensure that you really have all plugin packages installed and avoid proprietary formats when possible.

[JiujiuTong]

@SGaist
i have confirmed that the files can be played by gstreamer utils:gst-play-1.0.
and from the logs it seems that gstreamer works well
libva info: VA-API version 0.39.0
libva info: va_getDriverName() returns 0
libva info: Trying to open /usr/lib/x86_64-linux-gnu/dri/i965_drv_video.so
libva info: Found init function __vaDriverInit_0_39
libva info: va_openDriver() returns 0.

Thank you for your great support!

[SGaist]

Can you check which version of gstreamer is linked to the backend ?

[JiujiuTong]

@SGaist
here is the output of my host, only version 1.0 was found:
dpkg -l | grep -i "gstreamer"
ii gir1.2-gst-plugins-bad-1.0 1.8.3-1ubuntu0.2 amd64 GObject introspection data for the GStreamer libraries from the "bad" set
ii gir1.2-gst-plugins-base-1.0 1.8.3-1ubuntu0.2 amd64 GObject introspection data for the GStreamer Plugins Base library
ii gir1.2-gstreamer-1.0 1.8.3-1~ubuntu0.1 amd64 GObject introspection data for the GStreamer library
ii gnome-video-effects 0.4.1-3ubuntu1 all Collection of GStreamer effects
ii gstreamer1.0-alsa:amd64 1.8.3-1ubuntu0.2 amd64 GStreamer plugin for ALSA
ii gstreamer1.0-clutter 2.0.18-1 amd64 Clutter PLugin for GStreamer 1.0
ii gstreamer1.0-clutter-3.0 3.0.18-1 amd64 Clutter PLugin for GStreamer 1.0
ii gstreamer1.0-crystalhd 1:0.0~git20110715.fdd2f19-11build1 amd64 Crystal HD Video Decoder (GStreamer plugin)
ii gstreamer1.0-doc 1.8.3-1~ubuntu0.1 all GStreamer core documentation and manuals
ii gstreamer1.0-dvswitch 0.1.1-1 amd64 GStreamer plugin source from DVswitch
ii gstreamer1.0-espeak 0.4.0-1 amd64 GStreamer plugin for eSpeak speech synthesis
ii gstreamer1.0-fluendo-mp3:amd64 0.10.32.debian-1 amd64 Fluendo mp3 decoder GStreamer 1.0 plugin
ii gstreamer1.0-hybris:i386 1.8.3-1ubuntu0.2 i386 GStreamer plugins from hybris
ii gstreamer1.0-libav:amd64 1.8.3-1ubuntu0.2 amd64 libav plugin for GStreamer
ii gstreamer1.0-libav-dbg:amd64 1.8.3-1ubuntu0.2 amd64 libav plugin for GStreamer (debug symbols)
ii gstreamer1.0-nice:amd64 0.1.13-0ubuntu2 amd64 ICE library (GStreamer plugin)
ii gstreamer1.0-packagekit 0.8.17-4ubuntu6~gcc5.4ubuntu1.1 amd64 GStreamer plugin to install codecs using PackageKit
ii gstreamer1.0-plugins-bad:amd64 1.8.3-1ubuntu0.2 amd64 GStreamer plugins from the "bad" set
ii gstreamer1.0-plugins-bad-dbg:amd64 1.8.3-1ubuntu0.2 amd64 GStreamer plugins from the "bad" set (debug symbols)
ii gstreamer1.0-plugins-bad-doc 1.8.3-1ubuntu0.2 all GStreamer documentation for plugins from the "bad" set
ii gstreamer1.0-plugins-bad-faad:amd64 1.8.3-1ubuntu0.2 amd64 GStreamer faad plugin from the "bad" set
ii gstreamer1.0-plugins-bad-videoparsers:amd64 1.8.3-1ubuntu0.2 amd64 GStreamer videoparsers plugin from the "bad" set
ii gstreamer1.0-plugins-base:amd64 1.8.3-1ubuntu0.2 amd64 GStreamer plugins from the "base" set
ii gstreamer1.0-plugins-base:i386 1.8.3-1ubuntu0.2 i386 GStreamer plugins from the "base" set
ii gstreamer1.0-plugins-base-apps 1.8.3-1ubuntu0.2 amd64 GStreamer helper programs from the "base" set
ii gstreamer1.0-plugins-base-dbg:amd64 1.8.3-1ubuntu0.2 amd64 GStreamer plugins from the "base" set
ii gstreamer1.0-plugins-base-doc 1.8.3-1ubuntu0.2 all GStreamer documentation for plugins from the "base" set
ii gstreamer1.0-plugins-good:amd64 1.8.3-1ubuntu0.4 amd64 GStreamer plugins from the "good" set
ii gstreamer1.0-plugins-good-dbg:amd64 1.8.3-1ubuntu0.4 amd64 GStreamer plugins from the "good" set
ii gstreamer1.0-plugins-good-doc 1.8.3-1ubuntu0.4 all GStreamer documentation for plugins from the "good" set
ii gstreamer1.0-plugins-ugly:amd64 1.8.3-1ubuntu0.1 amd64 GStreamer plugins from the "ugly" set
ii gstreamer1.0-plugins-ugly-amr:amd64 1.8.3-1ubuntu0.1 amd64 GStreamer plugins from the "ugly" set
ii gstreamer1.0-plugins-ugly-dbg:amd64 1.8.3-1ubuntu0.1 amd64 GStreamer plugins from the "ugly" set (debug symbols)
ii gstreamer1.0-plugins-ugly-doc 1.8.3-1ubuntu0.1 all GStreamer documentation for plugins from the "ugly" set
ii gstreamer1.0-pocketsphinx:amd64 0.8.0+real5prealpha-1ubuntu2 amd64 Speech recognition tool - gstreamer plugin
ii gstreamer1.0-pulseaudio:amd64 1.8.3-1ubuntu0.4 amd64 GStreamer plugin for PulseAudio
ii gstreamer1.0-tools 1.8.3-1~ubuntu0.1 amd64 Tools for use with GStreamer
ii gstreamer1.0-vaapi:amd64 1.8.3-1~ubuntu0.1 amd64 VA-API plugins for GStreamer
ii gstreamer1.0-vaapi-doc 1.8.3-1~ubuntu0.1 all GStreamer VA-API documentation and manuals
ii gstreamer1.0-x:amd64 1.8.3-1ubuntu0.2 amd64 GStreamer plugins for X11 and Pango
ii libclutter-gst-3.0-0:amd64 3.0.18-1 amd64 Open GL based interactive canvas library GStreamer elements
ii libges-1.0-0 1.6.2-1 amd64 GStreamer editing services (shared library)
ii libges-1.0-dev 1.6.2-1 amd64 GStreamer editing services (development files)
ii libgstreamer-plugins-bad1.0-0:amd64 1.8.3-1ubuntu0.2 amd64 GStreamer development files for libraries from the "bad" set
ii libgstreamer-plugins-bad1.0-0:i386 1.8.3-1ubuntu0.2 i386 GStreamer development files for libraries from the "bad" set
ii libgstreamer-plugins-bad1.0-dev 1.8.3-1ubuntu0.2 amd64 GStreamer development files for libraries from the "bad" set
ii libgstreamer-plugins-base1.0-0:amd64 1.8.3-1ubuntu0.2 amd64 GStreamer libraries from the "base" set
ii libgstreamer-plugins-base1.0-0:i386 1.8.3-1ubuntu0.2 i386 GStreamer libraries from the "base" set
ii libgstreamer-plugins-base1.0-dev 1.8.3-1ubuntu0.2 amd64 GStreamer development files for libraries from the "base" set
ii libgstreamer-plugins-good1.0-0:amd64 1.8.3-1ubuntu0.4 amd64 GStreamer development files for libraries from the "good" set
ii libgstreamer-plugins-good1.0-dev 1.8.3-1ubuntu0.4 amd64 GStreamer development files for libraries from the "good" set
ii libgstreamer1.0-0:amd64 1.8.3-1~ubuntu0.1 amd64 Core GStreamer libraries and elements
ii libgstreamer1.0-0:i386 1.8.3-1~ubuntu0.1 i386 Core GStreamer libraries and elements
ii libgstreamer1.0-0-dbg:amd64 1.8.3-1~ubuntu0.1 amd64 Core GStreamer libraries and elements
ii libgstreamer1.0-dev 1.8.3-1~ubuntu0.1 amd64 GStreamer core development files
ii libgstreamermm-1.0-0v5:amd64 1.4.3+dfsg-5 amd64 C++ wrapper library for GStreamer (shared libraries)
ii libgstreamermm-1.0-dev:amd64 1.4.3+dfsg-5 amd64 C++ wrapper library for GStreamer (development files)
ii libqgsttools-p1:amd64 5.5.1-4ubuntu2 amd64 GStreamer tools for Qt 5 Multimedia module
ii libqt5gstreamer-1.0-0:amd64 1.2.0-3 amd64 C++ bindings library for GStreamer with a Qt-style API - Qt 5 build
ii libqt5gstreamer-dev 1.2.0-3 amd64 Development headers for QtGStreamer - Qt 5 build
ii libqt5gstreamerquick-1.0-0:amd64 1.2.0-3 amd64 QtGStreamerQuick library - Qt 5 build
ii libqt5gstreamerui-1.0-0:amd64 1.2.0-3 amd64 QtGStreamerUi library - Qt 5 build
ii libqt5gstreamerutils-1.0-0:amd64 1.2.0-3 amd64 QtGStreamerUtils library - Qt 5 build
ii libqtgstreamer-1.0-0:amd64 1.2.0-3 amd64 C++ bindings library for GStreamer with a Qt-style API
ii libqtgstreamer-dev 1.2.0-3 amd64 Development headers for QtGStreamer
ii libqtgstreamerui-1.0-0:amd64 1.2.0-3 amd64 QtGStreamerUi library
ii libqtgstreamerutils-1.0-0:amd64 1.2.0-3 amd64 QtGStreamerUtils library
ii libreoffice-avmedia-backend-gstreamer 1:5.1.6~rc2-0ubuntu1~xenial2 amd64 GStreamer backend for LibreOffice
ii qml-module-qtgstreamer:amd64 1.2.0-3 amd64 QML plugins from QtGStreamer - Qt 5 build
ii qtgstreamer-plugins:amd64 1.2.0-3 amd64 GStreamer plugins from QtGStreamer
ii qtgstreamer-plugins-qt5:amd64 1.2.0-3 amd64 GStreamer plugins from QtGStreamer - Qt 5 build
ii totem 3.18.1-1ubuntu4 amd64 Simple media player for the GNOME desktop based on GStreamer
Is there other ways to check which version Gstreamer is linked?

[SGaist]

ldd /path/to/QtMultimedia/plugin_file

[JiujiuTong]

@SGaist
my Qt5.8 is installed by qt-opensource-linux-x64-5.8.0.so i find libgstmediaplayer.so under the "Qt5.8.0/5.8/gcc_64/plugins/mediaservice" and the output of "ldd libgstmediaplayer.so " :
linux-vdso.so.1 => (0x00007ffe90bfb000)
libqgsttools_p.so.1 => /home/tong/Qt5.8.0/5.8/gcc_64/plugins/mediaservice/./../../lib/libqgsttools_p.so.1 (0x00007f3df06e0000)
libQt5MultimediaWidgets.so.5 => /home/tong/Qt5.8.0/5.8/gcc_64/plugins/mediaservice/./../../lib/libQt5MultimediaWidgets.so.5 (0x00007f3df04c1000)
libQt5Multimedia.so.5 => /home/tong/Qt5.8.0/5.8/gcc_64/plugins/mediaservice/./../../lib/libQt5Multimedia.so.5 (0x00007f3df01b7000)
libQt5Widgets.so.5 => /home/tong/Qt5.8.0/5.8/gcc_64/plugins/mediaservice/./../../lib/libQt5Widgets.so.5 (0x00007f3def986000)
libQt5Gui.so.5 => /home/tong/Qt5.8.0/5.8/gcc_64/plugins/mediaservice/./../../lib/libQt5Gui.so.5 (0x00007f3def1ea000)
libQt5Network.so.5 => /home/tong/Qt5.8.0/5.8/gcc_64/plugins/mediaservice/./../../lib/libQt5Network.so.5 (0x00007f3deee64000)
libQt5Core.so.5 => /home/tong/Qt5.8.0/5.8/gcc_64/plugins/mediaservice/./../../lib/libQt5Core.so.5 (0x00007f3dee744000)
libGL.so.1 => /usr/lib/x86_64-linux-gnu/mesa/libGL.so.1 (0x00007f3dee4a9000)
libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007f3dee28b000)
libgstaudio-1.0.so.0 => /usr/lib/x86_64-linux-gnu/libgstaudio-1.0.so.0 (0x00007f3dee02e000)
libgstvideo-1.0.so.0 => /usr/lib/x86_64-linux-gnu/libgstvideo-1.0.so.0 (0x00007f3dedda8000)
libgstpbutils-1.0.so.0 => /usr/lib/x86_64-linux-gnu/libgstpbutils-1.0.so.0 (0x00007f3dedb72000)
libgstapp-1.0.so.0 => /usr/lib/x86_64-linux-gnu/libgstapp-1.0.so.0 (0x00007f3ded964000)
libgstbase-1.0.so.0 => /usr/lib/x86_64-linux-gnu/libgstbase-1.0.so.0 (0x00007f3ded700000)
libgstreamer-1.0.so.0 => /usr/lib/x86_64-linux-gnu/libgstreamer-1.0.so.0 (0x00007f3ded3d5000)
libgobject-2.0.so.0 => /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0 (0x00007f3ded182000)
libpulse-mainloop-glib.so.0 => /usr/lib/x86_64-linux-gnu/libpulse-mainloop-glib.so.0 (0x00007f3decf7d000)
libpulse.so.0 => /usr/lib/x86_64-linux-gnu/libpulse.so.0 (0x00007f3decd2c000)
libglib-2.0.so.0 => /lib/x86_64-linux-gnu/libglib-2.0.so.0 (0x00007f3deca1b000)
libstdc++.so.6 => /usr/lib/x86_64-linux-gnu/libstdc++.so.6 (0x00007f3dec699000)
libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007f3dec38f000)
libgcc_s.so.1 => /lib/x86_64-linux-gnu/libgcc_s.so.1 (0x00007f3dec179000)
libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f3debdb0000)
libasound.so.2 => /usr/lib/x86_64-linux-gnu/libasound.so.2 (0x00007f3debaaf000)
libQt5OpenGL.so.5 => /home/tong/Qt5.8.0/5.8/gcc_64/plugins/mediaservice/./../../lib/libQt5OpenGL.so.5 (0x00007f3deb858000)
libz.so.1 => /lib/x86_64-linux-gnu/libz.so.1 (0x00007f3deb63d000)
libicui18n.so.56 => /home/tong/Qt5.8.0/5.8/gcc_64/plugins/mediaservice/./../../lib/libicui18n.so.56 (0x00007f3deb1a4000)
libicuuc.so.56 => /home/tong/Qt5.8.0/5.8/gcc_64/plugins/mediaservice/./../../lib/libicuuc.so.56 (0x00007f3deadeb000)
libicudata.so.56 => /home/tong/Qt5.8.0/5.8/gcc_64/plugins/mediaservice/./../../lib/libicudata.so.56 (0x00007f3de9408000)
libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007f3de9204000)
librt.so.1 => /lib/x86_64-linux-gnu/librt.so.1 (0x00007f3de8ffb000)
libgthread-2.0.so.0 => /usr/lib/x86_64-linux-gnu/libgthread-2.0.so.0 (0x00007f3de8df9000)
/lib64/ld-linux-x86-64.so.2 (0x000055e6931f6000)
libexpat.so.1 => /lib/x86_64-linux-gnu/libexpat.so.1 (0x00007f3de8bd0000)
libxcb-dri3.so.0 => /usr/lib/x86_64-linux-gnu/libxcb-dri3.so.0 (0x00007f3de89cc000)
libxcb-present.so.0 => /usr/lib/x86_64-linux-gnu/libxcb-present.so.0 (0x00007f3de87c9000)
libxcb-sync.so.1 => /usr/lib/x86_64-linux-gnu/libxcb-sync.so.1 (0x00007f3de85c2000)
libxshmfence.so.1 => /usr/lib/x86_64-linux-gnu/libxshmfence.so.1 (0x00007f3de83be000)
libglapi.so.0 => /usr/lib/x86_64-linux-gnu/libglapi.so.0 (0x00007f3de818f000)
libXext.so.6 => /usr/lib/x86_64-linux-gnu/libXext.so.6 (0x00007f3de7f7d000)
libXdamage.so.1 => /usr/lib/x86_64-linux-gnu/libXdamage.so.1 (0x00007f3de7d79000)
libXfixes.so.3 => /usr/lib/x86_64-linux-gnu/libXfixes.so.3 (0x00007f3de7b73000)
libX11-xcb.so.1 => /usr/lib/x86_64-linux-gnu/libX11-xcb.so.1 (0x00007f3de7971000)
libX11.so.6 => /usr/lib/x86_64-linux-gnu/libX11.so.6 (0x00007f3de7636000)
libxcb-glx.so.0 => /usr/lib/x86_64-linux-gnu/libxcb-glx.so.0 (0x00007f3de741d000)
libxcb-dri2.so.0 => /usr/lib/x86_64-linux-gnu/libxcb-dri2.so.0 (0x00007f3de7218000)
libxcb.so.1 => /usr/lib/x86_64-linux-gnu/libxcb.so.1 (0x00007f3de6ff5000)
libXxf86vm.so.1 => /usr/lib/x86_64-linux-gnu/libXxf86vm.so.1 (0x00007f3de6def000)
libdrm.so.2 => /usr/lib/x86_64-linux-gnu/libdrm.so.2 (0x00007f3de6be0000)
libgsttag-1.0.so.0 => /usr/lib/x86_64-linux-gnu/libgsttag-1.0.so.0 (0x00007f3de69a4000)
liborc-0.4.so.0 => /usr/lib/x86_64-linux-gnu/liborc-0.4.so.0 (0x00007f3de6724000)
libgmodule-2.0.so.0 => /usr/lib/x86_64-linux-gnu/libgmodule-2.0.so.0 (0x00007f3de651f000)
libffi.so.6 => /usr/lib/x86_64-linux-gnu/libffi.so.6 (0x00007f3de6317000)
libpulsecommon-8.0.so => /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-8.0.so (0x00007f3de609b000)
libjson-c.so.2 => /lib/x86_64-linux-gnu/libjson-c.so.2 (0x00007f3de5e90000)
libdbus-1.so.3 => /lib/x86_64-linux-gnu/libdbus-1.so.3 (0x00007f3de5c44000)
libpcre.so.3 => /lib/x86_64-linux-gnu/libpcre.so.3 (0x00007f3de59d3000)
libXau.so.6 => /usr/lib/x86_64-linux-gnu/libXau.so.6 (0x00007f3de57ce000)
libXdmcp.so.6 => /usr/lib/x86_64-linux-gnu/libXdmcp.so.6 (0x00007f3de55c8000)
libsystemd.so.0 => /lib/x86_64-linux-gnu/libsystemd.so.0 (0x00007f3de5542000)
libwrap.so.0 => /lib/x86_64-linux-gnu/libwrap.so.0 (0x00007f3de5338000)
libsndfile.so.1 => /usr/lib/x86_64-linux-gnu/libsndfile.so.1 (0x00007f3de50cf000)
libasyncns.so.0 => /usr/lib/x86_64-linux-gnu/libasyncns.so.0 (0x00007f3de4ec8000)
libselinux.so.1 => /lib/x86_64-linux-gnu/libselinux.so.1 (0x00007f3de4ca6000)
liblzma.so.5 => /lib/x86_64-linux-gnu/liblzma.so.5 (0x00007f3de4a83000)
libgcrypt.so.20 => /lib/x86_64-linux-gnu/libgcrypt.so.20 (0x00007f3de47a2000)
libnsl.so.1 => /lib/x86_64-linux-gnu/libnsl.so.1 (0x00007f3de4589000)
libFLAC.so.8 => /usr/lib/x86_64-linux-gnu/libFLAC.so.8 (0x00007f3de4313000)
libvorbisenc.so.2 => /usr/lib/x86_64-linux-gnu/libvorbisenc.so.2 (0x00007f3de406a000)
libresolv.so.2 => /lib/x86_64-linux-gnu/libresolv.so.2 (0x00007f3de3e4f000)
libgpg-error.so.0 => /lib/x86_64-linux-gnu/libgpg-error.so.0 (0x00007f3de3c3a000)
libogg.so.0 => /usr/lib/x86_64-linux-gnu/libogg.so.0 (0x00007f3de3a31000)
libvorbis.so.0 => /usr/lib/x86_64-linux-gnu/libvorbis.so.0 (0x00007f3de3805000)
so it is gstreamer1.0 linked , is it right?

[jsulm]

@JiujiuTong Yes, looks like 1.0

[JiujiuTong]

@jsulm @SGaist
thank you , but why video can't play? the file is OK... can you help me to figure it out?

[JiujiuTong]

@JiujiuTong said in video can't no play under QT5.8.0,mp3 plays well:

@jsulm @SGaist
thank you , but why video can't play? the file is OK... can you help me to figure it out?

@SGaist , it seems linked gstreamer version is 1.0. any ideas to check why video can't play with QT5.8?

[SGaist]

Enable the QtMultimedia logging category, that might give you more information.

[JiujiuTong]

@SGaist
can you give me more details please? for example, how to enable the QtMultimedia logging category.thank you

[SGaist]

See QLoggingCategory with qt.multimedia

[JiujiuTong]

@SGaist
thank you very much