OBS core dump on startup (Kubuntu 22.04)

T

trevor_smith

New Member
Saw an update come through the repo, tried to open OBS to check it out, but it crashes on starting.

Code: 
QWidget: Must construct a QApplication before a QWidget
Aborted (core dumped)

Any ideas? Thanks!

Kubuntu 22.04, i4770K, GTX 1060
OBS 28.0.0

Full CLI output:

Code: 
$ obs --verbose
debug: Found portal inhibitor
Attempted path: share/obs/obs-studio/locale/en-US.ini
Attempted path: /usr/share/obs/obs-studio/locale/en-US.ini
Attempted path: share/obs/obs-studio/locale.ini
Attempted path: /usr/share/obs/obs-studio/locale.ini
Attempted path: share/obs/obs-studio/themes/Yami.qss
Attempted path: /usr/share/obs/obs-studio/themes/Yami.qss
info: Command Line Arguments: --verbose
info: Using EGL/X11
info: CPU Name: Intel(R) Core(TM) i7-4770K CPU @ 3.50GHz
info: CPU Speed: 800.000MHz
info: Physical Cores: 4, Logical Cores: 8
info: Physical Memory: 15882MB Total, 9744MB Free
info: Kernel Version: Linux 5.15.0-47-generic
info: Distribution: "Ubuntu" "22.04"
info: Session Type: x11
info: Window System: X11.0, Vendor: The X.Org Foundation, Version: 1.21.1
debug: found alternate keycode 62 for OBS_KEY_SHIFT which already has keycode 50
debug: found alternate keycode 105 for OBS_KEY_CONTROL which already has keycode 37
debug: found alternate keycode 108 for OBS_KEY_ALT which already has keycode 64
debug: found alternate keycode 129 for OBS_KEY_NUMPERIOD which already has keycode 91
debug: found alternate keycode 190 for OBS_KEY_REDO which already has keycode 137
debug: found alternate keycode 218 for OBS_KEY_PRINT which already has keycode 107
debug: found alternate keycode 231 for OBS_KEY_CANCEL which already has keycode 136
info: Qt Version: 6.2.4 (runtime), 6.2.4 (compiled)
info: Portable mode: false
qt.svg: Cannot open file '/usr/share/obs/obs-studio/themes/Dark/Close.svg', because: No such file or directory
qt.svg: Cannot open file '/usr/share/obs/obs-studio/themes/Dark/Close.svg', because: No such file or directory
qt.svg: Cannot open file '/usr/share/obs/obs-studio/themes/Dark/Popout.svg', because: No such file or directory
qt.svg: Cannot open file '/usr/share/obs/obs-studio/themes/Dark/Popout.svg', because: No such file or directory
Attempted path: share/obs/obs-studio/themes/Dark/no_sources.svg
Attempted path: /usr/share/obs/obs-studio/themes/Dark/no_sources.svg
qt.core.qmetaobject.connectslotsbyname: QMetaObject::connectSlotsByName: No matching signal for on_tbar_position_valueChanged(int)
qt.core.qmetaobject.connectslotsbyname: QMetaObject::connectSlotsByName: No matching signal for on_actionShowTransitionProperties_triggered()
qt.core.qmetaobject.connectslotsbyname: QMetaObject::connectSlotsByName: No matching signal for on_actionHideTransitionProperties_triggered()
info: OBS 28.0.0 (linux)
info: ---------------------------------
info: ---------------------------------
info: audio settings reset:
        samples per sec: 48000
        speakers:        2
        max buffering:   960 milliseconds
        buffering type:  dynamically increasing
info: ---------------------------------
info: Initializing OpenGL...
debug: Created EGLDisplay 0x55ecf01f2970
info: Loading up OpenGL on adapter NVIDIA Corporation NVIDIA GeForce GTX 1060 6GB/PCIe/SSE2
info: OpenGL loaded successfully, version 3.3.0 NVIDIA 470.141.03, shading language 3.30 NVIDIA via Cg compiler
info: ---------------------------------
info: video settings reset:
        base resolution:   1920x1080
        output resolution: 1920x1080
        downscale filter:  Bicubic
        fps:               30/1
        format:            NV12
        YUV mode:          Rec. 709/Full
info: NV12 texture support not available
info: P010 texture support not available
info: Audio monitoring device:
        name: Default
        id: default
info: ---------------------------------
debug: ---------------------------------
debug: Loading module: aja-output-ui.so
warning: No AJA devices found, skipping loading AJA UI plugin
warning: Failed to initialize module 'aja-output-ui.so'
debug: ---------------------------------
debug: Loading module: aja.so
warning: No AJA devices found, skipping loading AJA plugin
warning: Failed to initialize module 'aja.so'
debug: ---------------------------------
debug: Loading module: decklink-captions.so
warning: Failed to load 'en-US' text for module: 'decklink-captions.so'
debug: ---------------------------------
debug: Loading module: decklink-output-ui.so
warning: Failed to load 'en-US' text for module: 'decklink-output-ui.so'
debug: ---------------------------------
debug: Loading module: decklink.so
libDeckLinkAPI.so: cannot open shared object file: No such file or directory
warning: A DeckLink iterator could not be created.  The DeckLink drivers may not be installed
warning: Failed to initialize module 'decklink.so'
debug: ---------------------------------
debug: Loading module: frontend-tools.so
debug: ---------------------------------
debug: Loading module: image-source.so
debug: ---------------------------------
debug: Required module function 'obs_module_load' in module '/usr//lib/x86_64-linux-gnu/obs-plugins/libcef.so' not found, loading of module failed
debug: Failed to load module file '/usr//lib/x86_64-linux-gnu/obs-plugins/libcef.so', not an OBS plugin
debug: ---------------------------------
debug: Required module function 'obs_module_load' in module '/usr//lib/x86_64-linux-gnu/obs-plugins/libEGL.so' not found, loading of module failed
debug: Failed to load module file '/usr//lib/x86_64-linux-gnu/obs-plugins/libEGL.so', not an OBS plugin
debug: ---------------------------------
debug: Required module function 'obs_module_load' in module '/usr//lib/x86_64-linux-gnu/obs-plugins/libGLESv2.so' not found, loading of module failed
debug: Failed to load module file '/usr//lib/x86_64-linux-gnu/obs-plugins/libGLESv2.so', not an OBS plugin
debug: ---------------------------------
debug: Required module function 'obs_module_load' in module '/usr//lib/x86_64-linux-gnu/obs-plugins/libvk_swiftshader.so' not found, loading of module failed
debug: Failed to load module file '/usr//lib/x86_64-linux-gnu/obs-plugins/libvk_swiftshader.so', not an OBS plugin
debug: ---------------------------------
debug: Loading module: linux-alsa.so
debug: ---------------------------------
debug: Loading module: linux-capture.so
debug: ---------------------------------
debug: Loading module: linux-jack.so
debug: ---------------------------------
debug: Loading module: linux-pipewire.so
info: [pipewire] Available captures:
info: [pipewire]     - Desktop capture
info: [pipewire]     - Window capture
debug: ---------------------------------
debug: Loading module: linux-pulseaudio.so
debug: ---------------------------------
debug: Loading module: linux-v4l2.so
debug: ---------------------------------
debug: Loading module: obs-browser.so
info: [obs-browser]: Version 2.18.5
info: [obs-browser]: CEF Version 103.0.5060.134 (runtime), 103.0.0-5060-shared-textures_143.2591+g4204d54+chromium-103.0.5060.134 (compiled)
debug: ---------------------------------
debug: Loading module: obs-ffmpeg.so
info: NVENC supported
info: FFMPEG VAAPI supported
debug: ---------------------------------
debug: Loading module: obs-filters.so
debug: ---------------------------------
debug: Loading module: obs-libfdk.so
debug: ---------------------------------
debug: Loading module: obs-outputs.so
debug: ---------------------------------
debug: Loading module: obs-transitions.so
debug: ---------------------------------
debug: Loading module: obs-vst.so
debug: ---------------------------------
debug: Loading module: obs-websocket.so
info: [obs-websocket] [obs_module_load] you can haz websockets (Version: 5.0.1 | RPC Version: 1)
info: [obs-websocket] [obs_module_load] Qt version (compile-time): 6.2.4 | Qt version (run-time): 6.2.4
info: [obs-websocket] [obs_module_load] Linked ASIO Version: 101201
info: [obs-websocket] [obs_module_load] Module loaded.
debug: ---------------------------------
debug: Loading module: obs-x264.so
debug: ---------------------------------
debug: Loading module: rtmp-services.so
debug: ---------------------------------
debug: Loading module: text-freetype2.so
debug: ---------------------------------
debug: Loading module: v4l2sink.so
debug: output 'V4l2sink' (v4l2sink) created
QWidget: Must construct a QApplication before a QWidget
Aborted (core dumped)
 
R

RAMChYLD

New Member
I'm having the exact same issue. OBS just upgraded to 28.0.0 moments ago. Running Ubuntu 22.04.

Ryzen 9 3950X, 32GB RAM, Radeon 5600XT (VAAPI).

Code: 
debug: Found portal inhibitor
Attempted path: share/obs/obs-studio/locale/en-US.ini
Attempted path: /usr/share/obs/obs-studio/locale/en-US.ini
Attempted path: share/obs/obs-studio/locale.ini
Attempted path: /usr/share/obs/obs-studio/locale.ini
Attempted path: share/obs/obs-studio/themes/Yami.qss
Attempted path: /usr/share/obs/obs-studio/themes/Yami.qss
info: Using EGL/X11
info: CPU Name: AMD Ryzen 9 3950X 16-Core Processor
info: CPU Speed: 4291.549MHz
info: Physical Cores: 16, Logical Cores: 32
info: Physical Memory: 32027MB Total, 26799MB Free
info: Kernel Version: Linux 5.19.0-6.1-liquorix-amd64
info: Distribution: "Ubuntu" "22.04"
info: Session Type: x11
info: Window System: X11.0, Vendor: The X.Org Foundation, Version: 1.21.1
info: Qt Version: 6.2.4 (runtime), 6.2.4 (compiled)
info: Portable mode: false
qt.svg: Cannot open file '/usr/share/obs/obs-studio/themes/Dark/Close.svg', because: No such file or directory
qt.svg: Cannot open file '/usr/share/obs/obs-studio/themes/Dark/Close.svg', because: No such file or directory
qt.svg: Cannot open file '/usr/share/obs/obs-studio/themes/Dark/Popout.svg', because: No such file or directory
qt.svg: Cannot open file '/usr/share/obs/obs-studio/themes/Dark/Popout.svg', because: No such file or directory
Attempted path: share/obs/obs-studio/themes/Dark/no_sources.svg
Attempted path: /usr/share/obs/obs-studio/themes/Dark/no_sources.svg
qt.core.qmetaobject.connectslotsbyname: QMetaObject::connectSlotsByName: No matching signal for on_tbar_position_valueChanged(int)
qt.core.qmetaobject.connectslotsbyname: QMetaObject::connectSlotsByName: No matching signal for on_actionShowTransitionProperties_triggered()
qt.core.qmetaobject.connectslotsbyname: QMetaObject::connectSlotsByName: No matching signal for on_actionHideTransitionProperties_triggered()
info: OBS 28.0.0 (linux)
info: ---------------------------------
info: ---------------------------------
info: audio settings reset:
    samples per sec: 48000
    speakers:        2
    max buffering:   960 milliseconds
    buffering type:  dynamically increasing
info: ---------------------------------
info: Initializing OpenGL...
info: Loading up OpenGL on adapter AMD AMD Radeon RX 5600 XT (navi10, LLVM 14.0.6, DRM 3.47, 5.19.0-6.1-liquorix-amd64)
info: OpenGL loaded successfully, version 4.6 (Core Profile) Mesa 22.3.0-devel (git-2b00ba2 2022-09-01 jammy-oibaf-ppa), shading language 4.60
info: ---------------------------------
info: video settings reset:
    base resolution:   1920x1080
    output resolution: 1920x1080
    downscale filter:  Bilinear
    fps:               60/1
    format:            NV12
    YUV mode:          Rec. 709/Full
info: NV12 texture support not available
info: P010 texture support not available
info: Audio monitoring device:
    name: Default
    id: default
info: ---------------------------------
warning: No AJA devices found, skipping loading AJA UI plugin
warning: Failed to initialize module 'aja-output-ui.so'
warning: No AJA devices found, skipping loading AJA plugin
warning: Failed to initialize module 'aja.so'
warning: Failed to load 'en-US' text for module: 'decklink-captions.so'
warning: Failed to load 'en-US' text for module: 'decklink-output-ui.so'
libDeckLinkAPI.so: cannot open shared object file: No such file or directory
warning: A DeckLink iterator could not be created.  The DeckLink drivers may not be installed
warning: Failed to initialize module 'decklink.so'
info: [pipewire] Available captures:
info: [pipewire]     - Desktop capture
info: [pipewire]     - Window capture
info: [obs-browser]: Version 2.18.5
info: [obs-browser]: CEF Version 103.0.5060.134 (runtime), 103.0.0-5060-shared-textures_143.2591+g4204d54+chromium-103.0.5060.134 (compiled)
info: FFMPEG VAAPI supported
info: [obs-ndi] hello ! (version 4.9.1)
info: [obs-ndi] Trying ''
info: [obs-ndi] Trying '/usr/lib'
info: [obs-ndi] Found NDI library at '/usr/lib/libndi.so.4'
info: [obs-ndi] NDI runtime loaded successfully
info: [obs-ndi] NDI library initialized successfully (NDI SDK LINUX 00:05:02 Apr  1 2020 4.5.1)
QWidget: Must construct a QApplication before a QWidget
Aborted (core dumped)
 
T

trevor_smith

New Member
Closed that issue... for me the issue was the v4l2sink module that I had compiled (it was built under a previous Qt version.)

@RAMChYLD if you run with "obs --verbose" does it show which modules are loading? Perhaps the one right before the dump will be the culprit.
 
R

RAMChYLD

New Member
trevor_smith said:
Closed that issue... for me the issue was the v4l2sink module that I had compiled (it was built under a previous Qt version.)

@RAMChYLD if you run with "obs --verbose" does it show which modules are loading? Perhaps the one right before the dump will be the culprit.
Click to expand...
It was just pointed out to me a minute ago on Reddit. The OBS-NDI plugin is the fault (however I do also have the v4l2sink module, so double whammy right there). Unfortunately, NDI is crucial to my workflow so I'll need to find someway to downgrade back to 27.2.4. It appears that the dev of the plugin, Palakis, appeared to have vanished without a trace although there are other contributors, and the new version of the plugin is apparently still isn't ready for prime time.
 
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