En effet il y a des erreurs (pourquoi n'ai-ja pas pensé à le lancer via le terminal :-?)
QSocketNotifier: Can only be used with threads started with QThread
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/locale/fr-FR.ini
Attempted path: /usr/share/obs/obs-studio/locale/fr-FR.ini
info: Using preferred locale 'fr-FR'
Attempted path: share/obs/obs-studio/themes/Dark.qss
Attempted path: /usr/share/obs/obs-studio/themes/Dark.qss
info: CPU Name: AMD Ryzen 7 2700 Eight-Core Processor
info: CPU Speed: 1636.356MHz
info: Physical Cores: 8, Logical Cores: 16
info: Physical Memory: 16000MB Total, 5678MB Free
info: Kernel Version: Linux 5.3.8-300.fc31.x86_64
info: Distribution: Fedora 31
info: Window System: X11.0 - vendor string: Fedora Project - vendor release: 12005000
info: Portable mode: false
Attempted path: share/obs/obs-studio/themes/Dark/no_sources.svg
Attempted path: /usr/share/obs/obs-studio/themes/Dark/no_sources.svg
QMetaObject::connectSlotsByName: No matching signal for on_advAudioProps_clicked()
QMetaObject::connectSlotsByName: No matching signal for on_advAudioProps_destroyed()
QMetaObject::connectSlotsByName: No matching signal for on_program_customContextMenuRequested(QPoint)
info: OBS 24.0.3 (linux)
info: ---------------------------------
info: ---------------------------------
info: audio settings reset:
samples per sec: 44100
speakers: 2
info: ---------------------------------
info: Initializing OpenGL...
info: Loading up OpenGL on adapter X.Org Radeon RX Vega (VEGA10, DRM 3.33.0, 5.3.8-300.fc31.x86_64, LLVM 9.0.0)
info: OpenGL loaded successfully, version 4.5 (Core Profile) Mesa 19.2.2, shading language 4.50
info: ---------------------------------
info: video settings reset:
base resolution: 1680x1050
output resolution: 1680x1050
downscale filter: Bicubic
fps: 60/1
format: NV12
YUV mode: 601/Partial
info: NV12 texture support not available
info: Audio monitoring device:
name: Par défaut
id: default
info: ---------------------------------
warning: Failed to load 'en-US' text for module: 'decklink-ouput-ui.so'
libDeckLinkAPI.so: cannot open shared object file: No such file or directory
info: No blackmagic support
error: os_dlopen(libnvidia-encode.so.1->libnvidia-encode.so.1): libnvidia-encode.so.1: cannot open shared object file: No such file or directory
info: FFMPEG VAAPI supported
error: os_dlopen(libvlc.so.5->libvlc.so.5): libvlc.so.5: cannot open shared object file: No such file or directory
info: Couldn't find VLC installation, VLC video source disabled
info: ---------------------------------
info: Loaded Modules:
info: vlc-video.so
info: text-freetype2.so
info: rtmp-services.so
info: obs-x264.so
info: obs-transitions.so
info: obs-outputs.so
info: obs-filters.so
info: obs-ffmpeg.so
info: linux-v4l2.so
info: linux-pulseaudio.so
info: linux-jack.so
info: linux-decklink.so
info: linux-capture.so
info: linux-alsa.so
info: image-source.so
info: frontend-tools.so
info: decklink-ouput-ui.so
info: ---------------------------------
info: ==== Startup complete ===============================================
error: Service '' not found
info: All scene data cleared
info: ------------------------------------------------
info: pulse-input: Server name: 'pulseaudio 13.0-rebootstrapped'
info: pulse-input: Audio format: s16le, 44100 Hz, 2 channels
info: pulse-input: Started recording from 'alsa_output.usb-Logitech_Logitech_G430_Gaming_Headset-00.analog-stereo.monitor'
info: pulse-input: Server name: 'pulseaudio 13.0-rebootstrapped'
info: pulse-input: Audio format: s16le, 32000 Hz, 2 channels
info: pulse-input: Started recording from 'alsa_input.usb-046d_HD_Pro_Webcam_C920_5A9A2F4F-02.analog-stereo'
info: xshm-input: Geometry 1680x1050 @ 1920,0
info: Switched to scene 'Scène'
info: ------------------------------------------------
info: Loaded scenes:
info: - scene 'Scène':
info: - source: 'Capture d'écran (XSHM)' (xshm_input)
info: - source: 'Image' (image_source)
info: ------------------------------------------------
error: Failed to fetch parent window geometry!
error: gl_platform_init_swapchain failed
error: obs_display_init: Failed to create swap chain
error: Failed to fetch parent window geometry!
error: gl_platform_init_swapchain failed
error: obs_display_init: Failed to create swap chain
error: Failed to fetch parent window geometry!
error: gl_platform_init_swapchain failed
error: obs_display_init: Failed to create swap chain
error: Failed to fetch parent window geometry!
error: gl_platform_init_swapchain failed
error: obs_display_init: Failed to create swap chain
error: Failed to fetch parent window geometry!
error: gl_platform_init_swapchain failed
error: obs_display_init: Failed to create swap chain
error: Failed to fetch parent window geometry!
error: gl_platform_init_swapchain failed
error: obs_display_init: Failed to create swap chain
error: Failed to fetch parent window geometry!
error: gl_platform_init_swapchain failed
error: obs_display_init: Failed to create swap chain
info: adding 69 milliseconds of audio buffering, total audio buffering is now 69 milliseconds (source: Mic/Aux)
error: Failed to fetch parent window geometry!
error: gl_platform_init_swapchain failed
error: obs_display_init: Failed to create swap chain