Thread 1 (Thread 0x7f9b672b98c0 (LWP 2024)):
#0  0x00007f9b64e37ab1 in __GI_ppoll (fds=0x2a786f0, nfds=3, timeout=<optimized out>, sigmask=0x0) at ../sysdeps/unix/sysv/linux/ppoll.c:56
#1  0x00007f9b1a73cc08 in gst_poll_wait () at /usr/lib/x86_64-linux-gnu/libgstreamer-1.0.so.0
#2  0x00007f9b1a739b0e in  () at /usr/lib/x86_64-linux-gnu/libgstreamer-1.0.so.0
#3  0x00007f9b1a73af5f in  () at /usr/lib/x86_64-linux-gnu/libgstreamer-1.0.so.0
#4  0x00007f9b1a7466ea in gst_update_registry () at /usr/lib/x86_64-linux-gnu/libgstreamer-1.0.so.0
#5  0x00007f9b1a6e46cc in  () at /usr/lib/x86_64-linux-gnu/libgstreamer-1.0.so.0
#6  0x00007f9b62707ee8 in g_option_context_parse (context=<optimized out>, argc=0x0, argv=<optimized out>, error=<optimized out>) at /build/glib2.0-iB_b5N/glib2.0-2.47.5/./glib/goption.c:2159
#7  0x00007f9b1a6e4fef in gst_init_check () at /usr/lib/x86_64-linux-gnu/libgstreamer-1.0.so.0
#8  0x00007f9b1a6e5044 in gst_init () at /usr/lib/x86_64-linux-gnu/libgstreamer-1.0.so.0
#9  0x00007f9b1ad7e410 in  () at /usr/lib/x86_64-linux-gnu/qt5/plugins/mediaservice/libgstmediaplayer.so
#10 0x00007f9b2c2f5a02 in  () at /usr/lib/x86_64-linux-gnu/libQt5Multimedia.so.5
#11 0x00007f9b2c32e609 in QMediaPlayer::QMediaPlayer(QObject*, QFlags<QMediaPlayer::Flag>) () at /usr/lib/x86_64-linux-gnu/libQt5Multimedia.so.5
#12 0x00007f9b1acdae2a in  () at /usr/lib/x86_64-linux-gnu/qt5/qml/QtMultimedia/libdeclarative_multimedia.so
#13 0x00007f9b65e479d9 in QQmlObjectCreator::createInstance(int, QObject*, bool) (this=this@entry=0x2894180, index=index@entry=0, parent=parent@entry=0x0, isContextObject=isContextObject@entry=true) at qml/qqmlobjectcreator.cpp:1112
#14 0x00007f9b65e491af in QQmlObjectCreator::create(int, QObject*, QQmlInstantiationInterrupt*) (this=0x2894180, subComponentIndex=-1, parent=parent@entry=0x0, interrupt=interrupt@entry=0x0) at qml/qqmlobjectcreator.cpp:209
#15 0x00007f9b65dd13d5 in QQmlComponentPrivate::beginCreate(QQmlContextData*) (this=0x28944a0, context=0x288d260) at qml/qqmlcomponent.cpp:880
#16 0x00007f9b65dd17a1 in QQmlComponent::beginCreate(QQmlContext*) (this=this@entry=0x7ffcec2d46c0, publicContext=publicContext@entry=0x2894d70) at qml/qqmlcomponent.cpp:829
#17 0x00007f9b65e5f997 in QV4::QtObject::method_createQmlObject(QV4::CallContext*) (ctx=0x7f9b3dffe150) at qml/v8/qqmlbuiltinfunctions.cpp:1026
#18 0x00007f9b65d47a6b in QV4::BuiltinFunction::call(QV4::Managed*, QV4::CallData*) (that=0x7f9b3dffe140, callData=<optimized out>) at jsruntime/qv4functionobject.cpp:615
#19 0x00007f9b65daa913 in QV4::Runtime::callProperty(QV4::ExecutionEngine*, int, QV4::CallData*) (d=0x7f9b3dffe0f0, this=<optimized out>) at jsruntime/qv4object_p.h:305
#20 0x00007f9b65daa913 in QV4::Runtime::callProperty(QV4::ExecutionEngine*, int, QV4::CallData*) (engine=0x264f630, nameIndex=<optimized out>, callData=0x7f9b3dffe0f0) at jsruntime/qv4runtime.cpp:981
#21 0x00007f9b540207a0 in  ()
#22 0x0000000000000000 in  ()