import QtQuick 2.12
import QtQuick.Window 2.12
import QtMultimedia 5.5


Window {
    visible: true
    width: 640
    height: 480
    title: qsTr("Hello World")
    id: main

    Camera
    {
        id: camera
        viewfinder {
            resolution: "640x480"
        }

        focus {
            focusMode: CameraFocus.FocusContinuous
            focusPointMode: CameraFocus.FocusPointAuto
        }
    }

    Component {
        id: component

        VideoOutput
        {
            id: videoOutput
            source: camera
            height: parent.height
            width: parent.width

            autoOrientation: true
            fillMode: VideoOutput.PreserveAspectCrop
        }
    }

    Loader {
        id: loader
        sourceComponent: component
        active: false
    }

    Timer {
        running: true
        repeat: false
        interval: 1500
        onTriggered: loader.active = true;
    }
}

QML debugging is enabled. Only use this in a safe environment.

[New Thread 0x7ffff2164700 (LWP 30865)]

[New Thread 0x7fffeb444700 (LWP 30866)]

[New Thread 0x7fffe882d700 (LWP 30867)]

[New Thread 0x7fffe3893700 (LWP 30868)]

[Thread 0x7fffe3893700 (LWP 30868) exited]

[New Thread 0x7fffe3893700 (LWP 30869)]

[Thread 0x7fffe3893700 (LWP 30869) exited]

Focus mode selection is not supported

Starting camera without viewfinder available

[New Thread 0x7fffe3893700 (LWP 30870)]

[New Thread 0x7fffe1c27700 (LWP 30871)]

[New Thread 0x7fffe1426700 (LWP 30872)]

[New Thread 0x7fffe0c25700 (LWP 30873)]

[New Thread 0x7fffcffff700 (LWP 30874)]

[New Thread 0x7fffcf7fe700 (LWP 30875)]

[New Thread 0x7fffceffd700 (LWP 30876)]

[New Thread 0x7fffce7fc700 (LWP 30877)]

[New Thread 0x7fffcdffb700 (LWP 30878)]

[New Thread 0x7fffcd7fa700 (LWP 30879)]

[New Thread 0x7fffccff9700 (LWP 30880)]

[New Thread 0x7fffabfff700 (LWP 30881)]



Thread 1 "CameraQmlCrashT" received signal SIGSEGV, Segmentation fault.

0x00007ffff54f5475 in g_mutex_lock () from /usr/lib/libglib-2.0.so.0

(gdb) bt

#0  0x00007ffff54f5475 in g_mutex_lock () at /usr/lib/libglib-2.0.so.0

#1  0x00007fffe3c6f6ed in gst_element_get_static_pad () at /usr/lib/libgstreamer-1.0.so.0

#2  0x00007fffe3c27031 in gst_element_link_pads_full () at /usr/lib/libgstreamer-1.0.so.0

#3  0x00007fffe3f63b1a in  () at /usr/lib/gstreamer-1.0/libgstcamerabin.so

#4  0x00007fffe3c71355 in gst_element_change_state () at /usr/lib/libgstreamer-1.0.so.0

#5  0x00007fffe3c719ed in  () at /usr/lib/libgstreamer-1.0.so.0

#6  0x00007fffe3c8cb6d in  () at /usr/lib/libgstreamer-1.0.so.0

#7  0x00007fffe3c71355 in gst_element_change_state () at /usr/lib/libgstreamer-1.0.so.0

#8  0x00007fffe3c719ed in  () at /usr/lib/libgstreamer-1.0.so.0

#9  0x00007fffe3fbba30 in CameraBinSession::load() (this=0x555555990230)

    at /tmp/qt5-multimedia/src/qtmultimedia-everywhere-src-5.13.0/src/plugins/gstreamer/camerabin/camerabinsession.cpp:865

#10 0x00007fffe3fbb81e in CameraBinSession::setStateHelper(QCamera::State) (this=0x555555990230, state=QCamera::ActiveState)

    at /tmp/qt5-multimedia/src/qtmultimedia-everywhere-src-5.13.0/src/plugins/gstreamer/camerabin/camerabinsession.cpp:823

#11 0x00007fffe3fbb6df in CameraBinSession::setStatus(QCamera::Status) (this=0x555555990230, status=QCamera::LoadingStatus)

    at /tmp/qt5-multimedia/src/qtmultimedia-everywhere-src-5.13.0/src/plugins/gstreamer/camerabin/camerabinsession.cpp:778

#12 0x00007fffe3fbb92a in CameraBinSession::load() (this=0x555555990230)

    at /tmp/qt5-multimedia/src/qtmultimedia-everywhere-src-5.13.0/src/plugins/gstreamer/camerabin/camerabinsession.cpp:843

#13 0x00007fffe3fbb81e in CameraBinSession::setStateHelper(QCamera::State) (this=0x555555990230, state=QCamera::ActiveState)

    at /tmp/qt5-multimedia/src/qtmultimedia-everywhere-src-5.13.0/src/plugins/gstreamer/camerabin/camerabinsession.cpp:823

#14 0x00007fffe3fbb753 in CameraBinSession::setState(QCamera::State) (this=0x555555990230, newState=QCamera::ActiveState)

    at /tmp/qt5-multimedia/src/qtmultimedia-everywhere-src-5.13.0/src/plugins/gstreamer/camerabin/camerabinsession.cpp:803

#15 0x00007fffe3fc60e3 in CameraBinControl::delayedReload() (this=0x555555a3f9c0)

    at /tmp/qt5-multimedia/src/qtmultimedia-everywhere-src-5.13.0/src/plugins/gstreamer/camerabin/camerabincontrol.cpp:249

#16 0x00007fffe3fdfc60 in CameraBinControl::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)

    (_o=0x555555a3f9c0, _c=QMetaObject::InvokeMetaMethod, _id=2, _a=0x555555bc42a0) at .moc/moc_camerabincontrol.cpp:104

#17 0x00007ffff6be044a in QObject::event(QEvent*) () at /usr/lib/libQt5Core.so.5

#18 0x00007ffff6bb39c2 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/libQt5Core.so.5

#19 0x00007ffff6bb6739 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib/libQt5Core.so.5

#20 0x00007ffff6c0c3a4 in  () at /usr/lib/libQt5Core.so.5

#21 0x00007ffff5542cf4 in g_main_context_dispatch () at /usr/lib/libglib-2.0.so.0

#22 0x00007ffff5544b11 in  () at /usr/lib/libglib-2.0.so.0

#23 0x00007ffff5544b51 in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0

#24 0x00007ffff6c0b9a3 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5

#25 0x00007ffff6bb25ec in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5

#26 0x00007ffff6bba326 in QCoreApplication::exec() () at /usr/lib/libQt5Core.so.5

#27 0x00005555555564d0 in main(int, char**) (argc=1, argv=0x7fffffffe298) at ../CameraQmlCrashTest/main.cpp:19

Focus mode selection is not supported
bool QDeclarativeVideoOutput::createBackend(QMediaService*) Media service has neither renderer nor window control available.