I have the same problem, and here is a log in my Arch Linux:
(Please translate some part of Chinese by yourself, though it's doesn't matter.)
[mooling@mooling-laptop ~]$ obs
debug: Found portal inhibitor
debug: Attempted path: share/obs/obs-studio/locale/en-US.ini
debug: Attempted path: /usr/share/obs/obs-studio/locale/en-US.ini
debug: Attempted path: share/obs/obs-studio/locale.ini
debug: Attempted path: /usr/share/obs/obs-studio/locale.ini
debug: Attempted path: share/obs/obs-studio/locale/zh-CN.ini
debug: Attempted path: /usr/share/obs/obs-studio/locale/zh-CN.ini
info: Using preferred locale 'zh-CN'
debug: Attempted path: share/obs/obs-studio/themes/Yami.qss
debug: Attempted path: /usr/share/obs/obs-studio/themes/Yami.qss
info: Using EGL/X11
info: CPU Name: 12th Gen Intel(R) Core(TM) i5-12450H
info: CPU Speed: 644.996MHz
info: Physical Cores: 8, Logical Cores: 12
info: Physical Memory: 15704MB Total, 4464MB Free
info: Kernel Version: Linux 6.4.3-native_intel-xanmod1-1-tt-uksm-cjktty
info: Distribution: "Arch Linux" Unknown
info: Desktop Environment: KDE (KDE)
info: Session Type: x11
info: Window System: X11.0, Vendor: The X.Org Foundation, Version: 1.21.1
info: Qt Version: 6.5.2 (runtime), 6.5.2 (compiled)
info: Portable mode: false
info: OBS 29.1.0-550-gecf914dd67-modified (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 Intel Mesa Intel(R) Graphics (ADL GT2)
info: OpenGL loaded successfully, version 4.6 (Core Profile) Mesa 23.1.5, shading language 4.60
info: ---------------------------------
info: video settings reset:
base resolution: 2560x1440
output resolution: 2560x1440
downscale filter: Bicubic
fps: 60/1
format: NV12
YUV mode: Rec. 709/Partial
info: NV12 texture support not available
info: P010 texture support not available
info: Audio monitoring device:
name: 默认
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: 无法打开共享对象文件: 没有那个文件或目录
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 2.22.0
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)
error: os_dlopen(/usr//lib/obs-plugins/obs-ffmpeg.so->/usr//lib/obs-plugins/obs-ffmpeg.so): libmbedcrypto.so.7: 无法打开共享对象文件: 没有那个文件或目录
error: os_dlopen(/usr//lib/obs-plugins/obs-ffmpeg.so->/usr//lib/obs-plugins/obs-ffmpeg.so): libmbedcrypto.so.7: 无法打开共享对象文件: 没有那个文件或目录
warning: Module '/usr//lib/obs-plugins/obs-ffmpeg.so' not loaded
info: [obs-websocket] [obs_module_load] you can haz websockets (Version: 5.2.3 | RPC Version: 1)
info: [obs-websocket] [obs_module_load] Qt version (compile-time): 6.5.2 | Qt version (run-time): 6.5.2
info: [obs-websocket] [obs_module_load] Linked ASIO Version: 102800
info: [obs-websocket] [obs_module_load] Module loaded.
info: [vlc-video]: VLC 3.0.18 Vetinari found, VLC video source enabled
info: ---------------------------------
info: Loaded Modules:
info: vlc-video.so
info: text-freetype2.so
info: rtmp-services.so
info: obs-x264.so
info: obs-websocket.so
info: obs-webrtc.so
info: obs-vst.so
info: obs-transitions.so
info: obs-qsv11.so
info: obs-outputs.so
info: obs-filters.so
info: obs-browser.so
info: linux-v4l2.so
info: linux-pulseaudio.so
info: linux-pipewire.so
info: linux-capture.so
info: linux-alsa.so
info: image-source.so
info: frontend-tools.so
info: decklink-output-ui.so
info: decklink-captions.so
info: ---------------------------------
warning: QWidget::setTabOrder: 'first' and 'second' must be in the same window
info: ==== Startup complete ===============================================
error: Failed to get properties for encoder '' (ffmpeg_aac)
error: Could not enumerate fallback encoder bitrates
error: Could not enumerate any audio encoder bitrates
error: Could not enumerate any AAC encoder bitrates
error: Failed to create audio streaming encoder (simple output)
info: [obs-websocket] [obs_module_unload] Shutting down...
info: [obs-websocket] [obs_module_unload] Finished shutting down.
info: [Scripting] Total detached callbacks: 0
info: Freeing OBS context data
info: 1 service(s) were remaining
info: == Profiler Results =============================
info: run_program_init: 3636.81 ms
info: ┣OBSApp::AppInit: 5.144 ms
info: ┃ ┗OBSApp::InitLocale: 1.387 ms
info: ┗OBSApp::OBSInit: 369.868 ms
info: ┣obs_startup: 1.21 ms
info: ┗OBSBasic::OBSInit: 308.308 ms
info: ┣OBSBasic::InitBasicConfig: 0.098 ms
info: ┣OBSBasic::ResetAudio: 0.221 ms
info: ┣OBSBasic::ResetVideo: 99.086 ms
info: ┃ ┗obs_init_graphics: 88.937 ms
info: ┃ ┗shader compilation: 33.014 ms
info: ┣OBSBasic::InitOBSCallbacks: 0.005 ms
info: ┣OBSBasic::InitHotkeys: 0.028 ms
info: ┣obs_load_all_modules2: 207.469 ms
info: ┃ ┣obs_init_module(aja-output-ui.so): 0.094 ms
info: ┃ ┣obs_init_module(aja.so): 0.07 ms
info: ┃ ┣obs_init_module(decklink-captions.so): 0 ms
info: ┃ ┣obs_init_module(decklink-output-ui.so): 0 ms
info: ┃ ┣obs_init_module(decklink.so): 0.102 ms
info: ┃ ┣obs_init_module(frontend-tools.so): 23.021 ms
info: ┃ ┣obs_init_module(image-source.so): 0.007 ms
info: ┃ ┣obs_init_module(linux-alsa.so): 0.003 ms
info: ┃ ┣obs_init_module(linux-capture.so): 0.856 ms
info: ┃ ┣obs_init_module(linux-pipewire.so): 0.911 ms
info: ┃ ┣obs_init_module(linux-pulseaudio.so): 0.001 ms
info: ┃ ┣obs_init_module(linux-v4l2.so): 3.394 ms
info: ┃ ┣obs_init_module(obs-browser.so): 0.049 ms
info: ┃ ┣obs_init_module(obs-filters.so): 0.017 ms
info: ┃ ┣obs_init_module(obs-outputs.so): 0.004 ms
info: ┃ ┣obs_init_module(obs-qsv11.so): 1.273 ms
info: ┃ ┣obs_init_module(obs-transitions.so): 0.006 ms
info: ┃ ┣obs_init_module(obs-vst.so): 0.002 ms
info: ┃ ┣obs_init_module(obs-webrtc.so): 0.004 ms
info: ┃ ┣obs_init_module(obs-websocket.so): 5.086 ms
info: ┃ ┣obs_init_module(obs-x264.so): 0.001 ms
info: ┃ ┣obs_init_module(rtmp-services.so): 0.106 ms
info: ┃ ┣obs_init_module(text-freetype2.so): 0.01 ms
info: ┃ ┗obs_init_module(vlc-video.so): 0.371 ms
info: ┣OBSBasic::InitService: 0.828 ms
info: ┗OBSBasic::ResetOutputs: 0.117 ms
info: obs_hotkey_thread(25 ms): min=0.045 ms, median=0.439 ms, max=17.706 ms, 99th percentile=5.081 ms, 100% below 25 ms
info: audio_thread(Audio): min=0.005 ms, median=0.022 ms, max=0.123 ms, 99th percentile=0.11 ms
info: obs_graphics_thread(16.6667 ms): min=0.007 ms, median=0.053 ms, max=2.996 ms, 99th percentile=0.124 ms, 100% below 16.667 ms
info: ┣tick_sources: min=0 ms, median=0.002 ms, max=0.008 ms, 99th percentile=0.005 ms
info: ┣output_frame: min=0.004 ms, median=0.027 ms, max=2.969 ms, 99th percentile=0.066 ms
info: ┃ ┗gs_context(video->graphics): min=0.004 ms, median=0.026 ms, max=2.967 ms, 99th percentile=0.065 ms
info: ┃ ┣render_video: min=0.001 ms, median=0.018 ms, max=0.045 ms, 99th percentile=0.045 ms
info: ┃ ┃ ┗render_main_texture: min=0.001 ms, median=0.014 ms, max=0.035 ms, 99th percentile=0.034 ms
info: ┃ ┗gs_flush: min=0 ms, median=0.005 ms, max=2.905 ms, 99th percentile=0.013 ms
info: ┗render_displays: min=0.001 ms, median=0.002 ms, max=0.008 ms, 99th percentile=0.006 ms
info: =================================================
info: == Profiler Time Between Calls ==================
info: obs_hotkey_thread(25 ms): min=25.131 ms, median=25.593 ms, max=30.162 ms, 35.0365% within ±2% of 25 ms (0% lower, 64.9635% higher)
info: obs_graphics_thread(16.6667 ms): min=15.48 ms, median=16.667 ms, max=17.791 ms, 98.0296% within ±2% of 16.667 ms (0.985222% lower, 0.985222% higher)
info: =================================================
info: Number of memory leaks: 727