Problem with Qt Multimedia

jsulm · 6 6EQUJ5 21 Mar 2017, 09:08

@6EQUJ5 Can you post the output with QT_DEBUG_PLUGINS again?

jsulm · 21 Mar 2017, 09:23

@6EQUJ5 Also: can you play a media file now?

6EQUJ5 · J jsulm 21 Mar 2017, 09:11

@jsulm No I cannot. Not with QMediaPlayer. QSoundEffect works though.

Output:

Starting /home/user/Documents/Qt Projects/Media-Player/build-Media-Player-Desktop-Release/Media-Player...

(Media-Player:7759): GStreamer-CRITICAL **: gst_object_ref_sink: assertion 'GST_IS_OBJECT (object)' failed
/home/user/Documents/Qt Projects/Media-Player/build-Media-Player-Desktop-Release/Media-Player exited with code 0

Starting /home/user/Documents/Qt Projects/Media-Player/build-Media-Player-Desktop-Release/Media-Player...

(Media-Player:7779): GStreamer-CRITICAL **: gst_object_ref_sink: assertion 'GST_IS_OBJECT (object)' failed
/home/user/Documents/Qt Projects/Media-Player/build-Media-Player-Desktop-Release/Media-Player exited with code 0

Starting /home/user/Documents/Qt Projects/Media-Player/build-Media-Player-Desktop-Release/Media-Player...

(Media-Player:7796): GStreamer-CRITICAL **: gst_object_ref_sink: assertion 'GST_IS_OBJECT (object)' failed
/home/user/Documents/Qt Projects/Media-Player/build-Media-Player-Desktop-Release/Media-Player exited with code 0

Starting /home/user/Documents/Qt Projects/Media-Player/build-Media-Player-Desktop-Release/Media-Player...

(Media-Player:7813): GStreamer-CRITICAL **: gst_object_ref_sink: assertion 'GST_IS_OBJECT (object)' failed
/home/user/Documents/Qt Projects/Media-Player/build-Media-Player-Desktop-Release/Media-Player exited with code 0

Starting /home/user/Documents/Qt Projects/Media-Player/build-Media-Player-Desktop-Release/Media-Player...

(Media-Player:7904): GStreamer-CRITICAL **: gst_object_ref_sink: assertion 'GST_IS_OBJECT (object)' failed
/home/user/Documents/Qt Projects/Media-Player/build-Media-Player-Desktop-Release/Media-Player exited with code 0

Starting /home/user/Documents/Qt Projects/Media-Player/build-Media-Player-Desktop-Release/Media-Player...

(Media-Player:7933): GStreamer-CRITICAL **: gst_object_ref_sink: assertion 'GST_IS_OBJECT (object)' failed
/home/user/Documents/Qt Projects/Media-Player/build-Media-Player-Desktop-Release/Media-Player exited with code 0

Starting /home/user/Documents/Qt Projects/Media-Player/build-Media-Player-Desktop-Release/Media-Player...
QFactoryLoader::QFactoryLoader() checking directory path "/usr/lib/x86_64-linux-gnu/qt5/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() looking at "/usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqeglfs.so"
Found metadata in lib /usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqeglfs.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.2",
    "MetaData": {
        "Keys": [
            "eglfs"
        ]
    },
    "className": "QEglFSIntegrationPlugin",
    "debug": false,
    "version": 328450
}


Got keys from plugin meta data ("eglfs")
QFactoryLoader::QFactoryLoader() looking at "/usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqkms.so"
Found metadata in lib /usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqkms.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.2",
    "MetaData": {
        "Keys": [
            "kms"
        ]
    },
    "className": "QKmsIntegrationPlugin",
    "debug": false,
    "version": 328450
}


Got keys from plugin meta data ("kms")
QFactoryLoader::QFactoryLoader() looking at "/usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqlinuxfb.so"
Found metadata in lib /usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqlinuxfb.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.2",
    "MetaData": {
        "Keys": [
            "linuxfb"
        ]
    },
    "className": "QLinuxFbIntegrationPlugin",
    "debug": false,
    "version": 328450
}


Got keys from plugin meta data ("linuxfb")
QFactoryLoader::QFactoryLoader() looking at "/usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqminimal.so"
Found metadata in lib /usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqminimal.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.2",
    "MetaData": {
        "Keys": [
            "minimal"
        ]
    },
    "className": "QMinimalIntegrationPlugin",
    "debug": false,
    "version": 328450
}


Got keys from plugin meta data ("minimal")
QFactoryLoader::QFactoryLoader() looking at "/usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqminimalegl.so"
Found metadata in lib /usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqminimalegl.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.2",
    "MetaData": {
        "Keys": [
            "minimalegl"
        ]
    },
    "className": "QMinimalEglIntegrationPlugin",
    "debug": false,
    "version": 328450
}


Got keys from plugin meta data ("minimalegl")
QFactoryLoader::QFactoryLoader() looking at "/usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqoffscreen.so"
Found metadata in lib /usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqoffscreen.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.2",
    "MetaData": {
        "Keys": [
            "offscreen"
        ]
    },
    "className": "QOffscreenIntegrationPlugin",
    "debug": false,
    "version": 328450
}


Got keys from plugin meta data ("offscreen")
QFactoryLoader::QFactoryLoader() looking at "/usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqxcb.so"
Found metadata in lib /usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqxcb.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.2",
    "MetaData": {
        "Keys": [
            "xcb"
        ]
    },
    "className": "QXcbIntegrationPlugin",
    "debug": false,
    "version": 328450
}


Got keys from plugin meta data ("xcb")
QFactoryLoader::QFactoryLoader() checking directory path "/home/user/Documents/Qt Projects/Media-Player/build-Media-Player-Desktop-Release/platforms" ...
loaded library "/usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqxcb.so"
loaded library "Xcursor"
QFactoryLoader::QFactoryLoader() checking directory path "/usr/lib/x86_64-linux-gnu/qt5/plugins/platformthemes" ...
QFactoryLoader::QFactoryLoader() looking at "/usr/lib/x86_64-linux-gnu/qt5/plugins/platformthemes/libqgtk2.so"
Found metadata in lib /usr/lib/x86_64-linux-gnu/qt5/plugins/platformthemes/libqgtk2.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformThemeFactoryInterface.5.1",
    "MetaData": {
        "Keys": [
            "gtk2"
        ]
    },
    "className": "QGtk2ThemePlugin",
    "debug": false,
    "version": 328450
}


Got keys from plugin meta data ("gtk2")
QFactoryLoader::QFactoryLoader() checking directory path "/home/user/Documents/Qt Projects/Media-Player/build-Media-Player-Desktop-Release/platformthemes" ...
loaded library "/usr/lib/x86_64-linux-gnu/qt5/plugins/platformthemes/libqgtk2.so"
QFactoryLoader::QFactoryLoader() checking directory path "/usr/lib/x86_64-linux-gnu/qt5/plugins/platforminputcontexts" ...
QFactoryLoader::QFactoryLoader() looking at "/usr/lib/x86_64-linux-gnu/qt5/plugins/platforminputcontexts/libcomposeplatforminputcontextplugin.so"
Found metadata in lib /usr/lib/x86_64-linux-gnu/qt5/plugins/platforminputcontexts/libcomposeplatforminputcontextplugin.so, metadata=
{
    "IID": "org.qt-project.Qt.QPlatformInputContextFactoryInterface",
    "MetaData": {
        "Keys": [
            "compose"
        ]
    },
    "className": "QComposePlatformInputContextPlugin",
    "debug": false,
    "version": 328450
}


Got keys from plugin meta data ("compose")
QFactoryLoader::QFactoryLoader() looking at "/usr/lib/x86_64-linux-gnu/qt5/plugins/platforminputcontexts/libibusplatforminputcontextplugin.so"
Found metadata in lib /usr/lib/x86_64-linux-gnu/qt5/plugins/platforminputcontexts/libibusplatforminputcontextplugin.so, metadata=
{
    "IID": "org.qt-project.Qt.QPlatformInputContextFactoryInterface",
    "MetaData": {
        "Keys": [
            "ibus"
        ]
    },
    "className": "QIbusPlatformInputContextPlugin",
    "debug": false,
    "version": 328450
}


Got keys from plugin meta data ("ibus")
QFactoryLoader::QFactoryLoader() checking directory path "/home/user/Documents/Qt Projects/Media-Player/build-Media-Player-Desktop-Release/platforminputcontexts" ...
loaded library "/usr/lib/x86_64-linux-gnu/qt5/plugins/platforminputcontexts/libcomposeplatforminputcontextplugin.so"
QFactoryLoader::QFactoryLoader() checking directory path "/usr/lib/x86_64-linux-gnu/qt5/plugins/generic" ...
QFactoryLoader::QFactoryLoader() looking at "/usr/lib/x86_64-linux-gnu/qt5/plugins/generic/libqevdevkeyboardplugin.so"
Found metadata in lib /usr/lib/x86_64-linux-gnu/qt5/plugins/generic/libqevdevkeyboardplugin.so, metadata=
{
    "IID": "org.qt-project.Qt.QGenericPluginFactoryInterface",
    "MetaData": {
        "Keys": [
            "EvdevKeyboard"
        ]
    },
    "className": "QEvdevKeyboardPlugin",
    "debug": false,
    "version": 328450
}


Got keys from plugin meta data ("evdevkeyboard")
QFactoryLoader::QFactoryLoader() looking at "/usr/lib/x86_64-linux-gnu/qt5/plugins/generic/libqevdevmouseplugin.so"
Found metadata in lib /usr/lib/x86_64-linux-gnu/qt5/plugins/generic/libqevdevmouseplugin.so, metadata=
{
    "IID": "org.qt-project.Qt.QGenericPluginFactoryInterface",
    "MetaData": {
        "Keys": [
            "EvdevMouse"
        ]
    },
    "className": "QEvdevMousePlugin",
    "debug": false,
    "version": 328450
}


Got keys from plugin meta data ("evdevmouse")
QFactoryLoader::QFactoryLoader() looking at "/usr/lib/x86_64-linux-gnu/qt5/plugins/generic/libqevdevtabletplugin.so"
Found metadata in lib /usr/lib/x86_64-linux-gnu/qt5/plugins/generic/libqevdevtabletplugin.so, metadata=
{
    "IID": "org.qt-project.Qt.QGenericPluginFactoryInterface",
    "MetaData": {
        "Keys": [
            "EvdevTablet"
        ]
    },
    "className": "QEvdevTabletPlugin",
    "debug": false,
    "version": 328450
}


Got keys from plugin meta data ("evdevtablet")
QFactoryLoader::QFactoryLoader() looking at "/usr/lib/x86_64-linux-gnu/qt5/plugins/generic/libqevdevtouchplugin.so"
Found metadata in lib /usr/lib/x86_64-linux-gnu/qt5/plugins/generic/libqevdevtouchplugin.so, metadata=
{
    "IID": "org.qt-project.Qt.QGenericPluginFactoryInterface",
    "MetaData": {
        "Keys": [
            "EvdevTouch"
        ]
    },
    "className": "QEvdevTouchScreenPlugin",
    "debug": false,
    "version": 328450
}


Got keys from plugin meta data ("evdevtouch")
QFactoryLoader::QFactoryLoader() checking directory path "/home/user/Documents/Qt Projects/Media-Player/build-Media-Player-Desktop-Release/generic" ...
QFactoryLoader::QFactoryLoader() checking directory path "/usr/lib/x86_64-linux-gnu/qt5/plugins/styles" ...
QFactoryLoader::QFactoryLoader() checking directory path "/home/user/Documents/Qt Projects/Media-Player/build-Media-Player-Desktop-Release/styles" ...
loaded library "gtk-x11-2.0"
loaded library "gnomeui-2"
loaded library "gnomevfs-2"
QFactoryLoader::QFactoryLoader() checking directory path "/usr/lib/x86_64-linux-gnu/qt5/plugins/mediaservice" ...
QFactoryLoader::QFactoryLoader() looking at "/usr/lib/x86_64-linux-gnu/qt5/plugins/mediaservice/libgstaudiodecoder.so"
Found metadata in lib /usr/lib/x86_64-linux-gnu/qt5/plugins/mediaservice/libgstaudiodecoder.so, metadata=
{
    "IID": "org.qt-project.qt.mediaserviceproviderfactory/5.0",
    "MetaData": {
        "Keys": [
            "gstreameraudiodecode"
        ],
        "Services": [
            "org.qt-project.qt.audiodecode"
        ]
    },
    "className": "QGstreamerAudioDecoderServicePlugin",
    "debug": false,
    "version": 328450
}


Got keys from plugin meta data ("gstreameraudiodecode")
QFactoryLoader::QFactoryLoader() looking at "/usr/lib/x86_64-linux-gnu/qt5/plugins/mediaservice/libgstcamerabin.so"
Found metadata in lib /usr/lib/x86_64-linux-gnu/qt5/plugins/mediaservice/libgstcamerabin.so, metadata=
{
    "IID": "org.qt-project.qt.mediaserviceproviderfactory/5.0",
    "MetaData": {
        "Keys": [
            "gstreamercamerabin"
        ],
        "Services": [
            "org.qt-project.qt.camera"
        ]
    },
    "className": "CameraBinServicePlugin",
    "debug": false,
    "version": 328450
}


Got keys from plugin meta data ("gstreamercamerabin")
QFactoryLoader::QFactoryLoader() looking at "/usr/lib/x86_64-linux-gnu/qt5/plugins/mediaservice/libgstmediacapture.so"
Found metadata in lib /usr/lib/x86_64-linux-gnu/qt5/plugins/mediaservice/libgstmediacapture.so, metadata=
{
    "IID": "org.qt-project.qt.mediaserviceproviderfactory/5.0",
    "MetaData": {
        "Keys": [
            "gstreamermediacapture"
        ],
        "Services": [
            "org.qt-project.qt.audiosource"
        ]
    },
    "className": "QGstreamerCaptureServicePlugin",
    "debug": false,
    "version": 328450
}


Got keys from plugin meta data ("gstreamermediacapture")
QFactoryLoader::QFactoryLoader() looking at "/usr/lib/x86_64-linux-gnu/qt5/plugins/mediaservice/libgstmediaplayer.so"
Found metadata in lib /usr/lib/x86_64-linux-gnu/qt5/plugins/mediaservice/libgstmediaplayer.so, metadata=
{
    "IID": "org.qt-project.qt.mediaserviceproviderfactory/5.0",
    "MetaData": {
        "Keys": [
            "gstreamermediaplayer"
        ],
        "Services": [
            "org.qt-project.qt.mediaplayer"
        ]
    },
    "className": "QGstreamerPlayerServicePlugin",
    "debug": false,
    "version": 328450
}


Got keys from plugin meta data ("gstreamermediaplayer")
QFactoryLoader::QFactoryLoader() checking directory path "/home/user/Documents/Qt Projects/Media-Player/build-Media-Player-Desktop-Release/mediaservice" ...
loaded library "/usr/lib/x86_64-linux-gnu/qt5/plugins/mediaservice/libgstmediaplayer.so"

(Media-Player:8039): GStreamer-CRITICAL **: gst_object_ref_sink: assertion 'GST_IS_OBJECT (object)' failed
QFactoryLoader::QFactoryLoader() checking directory path "/usr/lib/x86_64-linux-gnu/qt5/plugins/resourcepolicy" ...
QFactoryLoader::QFactoryLoader() checking directory path "/home/user/Documents/Qt Projects/Media-Player/build-Media-Player-Desktop-Release/resourcepolicy" ...
QFactoryLoader::QFactoryLoader() checking directory path "/usr/lib/x86_64-linux-gnu/qt5/plugins/accessiblebridge" ...
QFactoryLoader::QFactoryLoader() checking directory path "/home/user/Documents/Qt Projects/Media-Player/build-Media-Player-Desktop-Release/accessiblebridge" ...
QLibraryPrivate::unload succeeded on "/usr/lib/x86_64-linux-gnu/qt5/plugins/mediaservice/libgstmediaplayer.so" 
QLibraryPrivate::unload succeeded on "/usr/lib/x86_64-linux-gnu/qt5/plugins/platforminputcontexts/libcomposeplatforminputcontextplugin.so" 
QLibraryPrivate::unload succeeded on "/usr/lib/x86_64-linux-gnu/qt5/plugins/platformthemes/libqgtk2.so" 
QLibraryPrivate::unload succeeded on "/usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqxcb.so" 
QLibraryPrivate::unload succeeded on "Xcursor" (faked)
QLibraryPrivate::unload succeeded on "gnomevfs-2" (faked)
QLibraryPrivate::unload succeeded on "gtk-x11-2.0" (faked)
/home/user/Documents/Qt Projects/Media-Player/build-Media-Player-Desktop-Release/Media-Player exited with code 0

SGaist · 22 Mar 2017, 08:19

What GStreamer package did you install ?

KhoaTran Programmer · wrote on 22 Mar 2017, 01:09

@6EQUJ5 ,

Your log is not detail enough. You should enable Gstreamer debug, your current is just Qt.

But I guest that, your current Gstreamer plugin is not enough to playback.

One question, what kind of movie content you want to playback?(Mp4, WMV, H264, H265, MP3, ...)

Best regards,
Khoa

6EQUJ5 · S SGaist 21 Mar 2017, 13:27

@SGaist I didn't install GStreamer. How to install? Specific instructions please the official GStreamer site doesn't help much at all for Debian.

@KhoaTran-Programmer Firstly, the commands to check if GStreamer is installed doesn't work. How to install? Specifically. The official GStreamer site doesn't help at all for Debian. Also, I would want to play MP4, MP3, AVI, WMV, etc. All those common ones. Doesn't QMediaPlayer support most common ones?

SGaist · 23 Mar 2017, 07:56

Because it's not their role. Use your distribution tools to install GStreamer.

Specifically, apt-cache search to see what package are installed and apt-get install to install what you want.

In your case, libgstreamer1.0-dev as well as all the 1.0 plugins packages.

6EQUJ5 · S SGaist 22 Mar 2017, 08:34

@SGaist I did that and the same error happens.

SGaist · 24 Mar 2017, 07:39

Can you play that file with the gstreamer tools directly ?

6EQUJ5 · S SGaist 23 Mar 2017, 22:01

@SGaist How would I do that?

SGaist · 25 Mar 2017, 03:24

gst-play-1.0 your_video_file

6EQUJ5 · S SGaist 24 Mar 2017, 08:07

@SGaist The command doesn't exist. Even though I installed libgstreamer1.0-dev.

SGaist · 25 Mar 2017, 23:18

That's the development package to be able to use the library in your own projects. You need to install the GStreamer tools.

6EQUJ5 · S SGaist 25 Mar 2017, 21:02

@SGaist What package do I need to install for the GStreamer tools?

SGaist · 27 Mar 2017, 07:51

Please learn to use the tools from your distribution apt-cache search gstreamer | grep tools.

6EQUJ5 · S SGaist 26 Mar 2017, 20:46

@SGaist I installed all the packages that came up with that command. gst-play-1.0 still doesn't work.

SGaist · 27 Mar 2017, 07:57

What doesn't work ?

You can't read the file using the command ?

6EQUJ5 · S SGaist 27 Mar 2017, 07:55

@SGaist The command still doesn't exist according to the terminal even with sudo.

SGaist · 27 Mar 2017, 09:56

Seriously, did you even try to search where that file could be found ?

In this case it's the package gstreamer1.0-plugins-base-apps and the tools package is a dependency of that one.

6EQUJ5 · S SGaist 27 Mar 2017, 08:05

@SGaist I'm sorry. I may be at least an amateur programmer, but I'm definitely not a Linux expert, so I lack knowledge. I tried googling to get gst-play-1.0 to work but came up with nothing.

Installing gstreamer1.0-plugins-base-apps allowed me to use the gst-play-1.0 command. But, when I try to play a video file (MP4) the same thing happens! I get logged out!