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  4. When running the QTMultimedia player, segmentation fault errors occur.
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When running the QTMultimedia player, segmentation fault errors occur.

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  • S Offline
    S Offline
    sootoo23
    wrote on last edited by
    #1

    Hi All

    I built qtmultimedia and run the player, I get a segmantaion fault error.

    However, when I run it with gst-launch-1.0, works fine.
    ( # gst-launch-1.0 playbin uri=file:///john/KakaoTalk_20240224_145010135.mp4 video-sink=waylandsink )

    Could anybody give an example or teach me how to write a demo to use waylandsink to play a gstreamer ?

    Env:
    QT Version: 5.15.7
    Wayland backend
    shell=desktop-shell.so

    command:
    root@main:/john# export QT_GSTREAMER_WIDGET_VIDEOSINK=waylandsink
    root@main:/john# export QT_GSTREAMER_WINDOW_VIDEOSINK=waylandsink
    root@main:/john# export GST_DEBUG=video-info:7,waylandsink:7
    root@main:/john# ./player /john/KakaoTalk_20240224_145010135.mp4

    log:
    0:00:06.160281336 10951 0x7f7c012000 DEBUG video-info video-info.c:537:gst_video_info_from_caps: no colorimetry, using default
    0:00:06.160330253 10951 0x7f7c012000 DEBUG video-info video-info.c:406:gst_video_info_from_caps: parsing caps video/x-raw, format=(string)NV12, width=(int)1920, height=(int)1080, pixel-aspect-ratio=(fraction)1/1, interlace-mode=(string)progressive, multiview-mode=(string)mono, multiview-flags=(GstVideoMultiviewFlagsSet)0:ffffffff:/right-view-first/left-flipped/left-flopped/right-flipped/right-flopped/half-aspect/mixed-mono, framerate=(fraction)30/1, tc-vdec=(boolean)true
    0:00:06.160352795 10951 0x7f7c012000 DEBUG video-info video-info.c:537:gst_video_info_from_caps: no colorimetry, using default
    0:00:06.160399045 10951 0x7f7c012000 DEBUG video-info video-info.c:406:gst_video_info_from_caps: parsing caps video/x-raw, format=(string)NV12, width=(int)1920, height=(int)1080, pixel-aspect-ratio=(fraction)1/1, interlace-mode=(string)progressive, multiview-mode=(string)mono, multiview-flags=(GstVideoMultiviewFlagsSet)0:ffffffff:/right-view-first/left-flipped/left-flopped/right-flipped/right-flopped/half-aspect/mixed-mono, framerate=(fraction)30/1, tc-vdec=(boolean)true
    0:00:06.160420586 10951 0x7f7c012000 DEBUG video-info video-info.c:537:gst_video_info_from_caps: no colorimetry, using default
    0:00:06.161158545 10951 0x7f6400e1e0 LOG waylandsink gstwaylandsink.c:731:gst_wayland_sink_show_frame:<waylandsink1> render buffer 0x7f78300b40
    Segmentation fault

    Thanks.

    S 1 Reply Last reply
    0
    • S Offline
      S Offline
      sootoo23
      wrote on last edited by
      #2
      This post is deleted!
      1 Reply Last reply
      0
      • S sootoo23

        Hi All

        I built qtmultimedia and run the player, I get a segmantaion fault error.

        However, when I run it with gst-launch-1.0, works fine.
        ( # gst-launch-1.0 playbin uri=file:///john/KakaoTalk_20240224_145010135.mp4 video-sink=waylandsink )

        Could anybody give an example or teach me how to write a demo to use waylandsink to play a gstreamer ?

        Env:
        QT Version: 5.15.7
        Wayland backend
        shell=desktop-shell.so

        command:
        root@main:/john# export QT_GSTREAMER_WIDGET_VIDEOSINK=waylandsink
        root@main:/john# export QT_GSTREAMER_WINDOW_VIDEOSINK=waylandsink
        root@main:/john# export GST_DEBUG=video-info:7,waylandsink:7
        root@main:/john# ./player /john/KakaoTalk_20240224_145010135.mp4

        log:
        0:00:06.160281336 10951 0x7f7c012000 DEBUG video-info video-info.c:537:gst_video_info_from_caps: no colorimetry, using default
        0:00:06.160330253 10951 0x7f7c012000 DEBUG video-info video-info.c:406:gst_video_info_from_caps: parsing caps video/x-raw, format=(string)NV12, width=(int)1920, height=(int)1080, pixel-aspect-ratio=(fraction)1/1, interlace-mode=(string)progressive, multiview-mode=(string)mono, multiview-flags=(GstVideoMultiviewFlagsSet)0:ffffffff:/right-view-first/left-flipped/left-flopped/right-flipped/right-flopped/half-aspect/mixed-mono, framerate=(fraction)30/1, tc-vdec=(boolean)true
        0:00:06.160352795 10951 0x7f7c012000 DEBUG video-info video-info.c:537:gst_video_info_from_caps: no colorimetry, using default
        0:00:06.160399045 10951 0x7f7c012000 DEBUG video-info video-info.c:406:gst_video_info_from_caps: parsing caps video/x-raw, format=(string)NV12, width=(int)1920, height=(int)1080, pixel-aspect-ratio=(fraction)1/1, interlace-mode=(string)progressive, multiview-mode=(string)mono, multiview-flags=(GstVideoMultiviewFlagsSet)0:ffffffff:/right-view-first/left-flipped/left-flopped/right-flipped/right-flopped/half-aspect/mixed-mono, framerate=(fraction)30/1, tc-vdec=(boolean)true
        0:00:06.160420586 10951 0x7f7c012000 DEBUG video-info video-info.c:537:gst_video_info_from_caps: no colorimetry, using default
        0:00:06.161158545 10951 0x7f6400e1e0 LOG waylandsink gstwaylandsink.c:731:gst_wayland_sink_show_frame:<waylandsink1> render buffer 0x7f78300b40
        Segmentation fault

        Thanks.

        S Offline
        S Offline
        sootoo23
        wrote on last edited by
        #3

        gdb call stack:

        (gdb) bt
        #0 QAbstractSlider::isSliderDown() const (this=0x0) at /usr/src/debug/qtbase/5.15.7+gitAUTOINC+358aebba72-r0/git/src/widgets/widgets/qabstractslider.cpp:482
        #1 0x0000005555560b90 in ()
        #2 0x0000007ff6b14a34 in QtPrivate::QSlotObjectBase::call(QObject*, void**) (a=0x7fffffe378, r=<optimized out>, this=0x55556d9890)
        at ../../include/QtCore/../../../git/src/corelib/kernel/qobjectdefs_impl.h:398
        #3 doActivate<false>(QObject*, int, void**) (sender=0x55555bd7f0, signal_index=14, argv=0x7fffffe378)
        at /usr/src/debug/qtbase/5.15.7+gitAUTOINC+358aebba72-r0/git/src/corelib/kernel/qobject.cpp:3919
        #4 0x0000007ff6b0d664 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**)
        (sender=<optimized out>, m=<optimized out>, local_signal_index=local_signal_index@entry=5, argv=argv@entry=0x7fffffe378)
        at /usr/src/debug/qtbase/5.15.7+gitAUTOINC+358aebba72-r0/git/src/corelib/kernel/qobject.cpp:3979
        #5 0x0000007ff7ef1134 in QMediaPlayer::positionChanged(long long) (this=<optimized out>, _t1=<optimized out>) at .moc/moc_qmediaplayer.cpp:751
        #6 0x0000007ff6b14a34 in QtPrivate::QSlotObjectBase::call(QObject*, void**) (a=0x7fffffe4a8, r=<optimized out>, this=0x55556d3b30)
        at ../../include/QtCore/../../../git/src/corelib/kernel/qobjectdefs_impl.h:398
        #7 doActivate<false>(QObject*, int, void**) (sender=0x55556bf130, signal_index=5, argv=0x7fffffe4a8)
        at /usr/src/debug/qtbase/5.15.7+gitAUTOINC+358aebba72-r0/git/src/corelib/kernel/qobject.cpp:3919
        #8 0x0000007ff6b0d664 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**)
        (sender=sender@entry=0x55556bf130, m=<optimized out>, local_signal_index=local_signal_index@entry=2, argv=argv@entry=0x7fffffe4a8)
        at /usr/src/debug/qtbase/5.15.7+gitAUTOINC+358aebba72-r0/git/src/corelib/kernel/qobject.cpp:3979
        #9 0x0000007ff7ee3e64 in QMediaPlayerControl::positionChanged(long long) (this=this@entry=0x55556bf130, _t1=<optimized out>) at .moc/moc_qmediaplayercontrol.cpp:344
        #10 0x0000007ff501611c in QGstreamerPlayerControl::setMedia(QMediaContent const&, QIODevice*) (this=0x55556bf130, content=..., stream=0x0)
        at /usr/src/debug/qtmultimedia/5.15.7+gitAUTOINC+eeb34aae03-r0/git/src/gsttools/qgstreamerplayercontrol.cpp:403
        #11 0x0000007ff7ef1bb4 in QMediaPlayerPrivate::setMedia(QMediaContent const&, QIODevice*) (this=this@entry=0x55555bd810, media=..., stream=stream@entry=0x0)
        at /usr/src/debug/qtmultimedia/5.15.7+gitAUTOINC+eeb34aae03-r0/git/src/multimedia/playback/qmediaplayer.cpp:412
        #12 0x0000007ff7ef4b90 in QMediaPlayer::setMedia(QMediaContent const&, QIODevice*) (this=0x55555bd7f0, media=..., stream=0x0)
        at /usr/src/debug/qtmultimedia/5.15.7+gitAUTOINC+eeb34aae03-r0/git/src/multimedia/playback/qmediaplayer.cpp:1094
        #13 0x0000005555561db4 in ()
        #14 0x000000555555e4c4 in main ()

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