Bug Report Segmentation fault when starting recording or starting Auto-Configuration Wizard

W

workoft

New Member
Hi,

OBS crasher with the following when starting a recording:

Code: 
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/Dark.qss
Attempted path: /usr/share/obs/obs-studio/themes/Dark.qss
info: CPU Name: Intel(R) Core(TM) i7-6500U CPU @ 2.50GHz
info: CPU Speed: 2841.522MHz
info: Physical Cores: 2, Logical Cores: 4
info: Physical Memory: 15901MB Total, 12102MB Free
info: Kernel Version: Linux 5.4.0-4-amd64
info: Distribution: "Debian GNU/Linux" Unknown
info: Window System: X11.0, Vendor: The X.Org Foundation, Version: 1.20.8
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_actionGridMode_triggered()
QMetaObject::connectSlotsByName: No matching signal for on_program_customContextMenuRequested(QPoint)
info: OBS 25.0.3+dfsg1-2 (linux)
info: ---------------------------------
info: ---------------------------------
info: audio settings reset:
        samples per sec: 44100
        speakers:        2
info: ---------------------------------
info: Initializing OpenGL...
info: Loading up OpenGL on adapter Intel Mesa Intel(R) HD Graphics 520 (SKL GT2)
info: OpenGL loaded successfully, version 4.6 (Core Profile) Mesa 20.0.2, shading language 4.60
info: ---------------------------------
info: video settings reset:
        base resolution:   1280x720
        output resolution: 1280x720
        downscale filter:  Bicubic
        fps:               30/1
        format:            NV12
        YUV mode:          601/Partial
info: NV12 texture support not available
info: Audio monitoring device:
        name: Default
        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
warning: A DeckLink iterator could not be created.  The DeckLink drivers may not be installed
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
info: VLC 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-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 ===============================================
info: All scene data cleared
info: ------------------------------------------------
info: pulse-input: Server name: 'pulseaudio 13.0'
info: pulse-input: Audio format: s16le, 48000 Hz, 2 channels
info: pulse-input: Started recording from 'alsa_output.pci-0000_00_1f.3.analog-stereo.monitor'
info: pulse-input: Server name: 'pulseaudio 13.0'
info: pulse-input: Audio format: s16le, 44100 Hz, 2 channels
info: pulse-input: Started recording from 'alsa_input.pci-0000_00_1f.3.analog-stereo'
info: Switched to scene 'xournalpp'
info: ------------------------------------------------
info: Loaded scenes:
info: - scene 'xournalpp':
info:     - source: 'Window Capture (Xcomposite)' (xcomposite_input)
info: ------------------------------------------------
Attempted path: share/obs/obs-studio/images/overflow.png
Attempted path: /usr/share/obs/obs-studio/images/overflow.png
info: adding 46 milliseconds of audio buffering, total audio buffering is now 46 milliseconds (source: Desktop Audio)

info: ---------------------------------
info: [x264 encoder: 'recording_h264'] preset: medium
info: [x264 encoder: 'recording_h264'] settings:
        rate_control: CBR
        bitrate:      2500
        buffer size:  2500
        crf:          0
        fps_num:      30
        fps_den:      1
        width:        1280
        height:       720
        keyint:       250

info: [x264 encoder: 'recording_h264'] subme=0 + direct=temporal is not supported

Segmentation fault

The lines "info: ------" and following is what appears upon crash, the previous lines appear during and shortly after startup, I included them in case any relevant information is there.

I'm on Debian sid running KDE 5. My OBS Version is 25.0.3.

Regards,
Malte
 
gkr

gkr

New Member
Hi Malte,
installing libnvidia-encode1 via apt resolved a similar problem for me, see also the error message you have quite on top in your log.
I hope this helps,
regards,
George
 
Tuna

Tuna

Member
This seems to me like an indication of a mismatch of libx264 being installed and OBS was compiled with.
 
gkr

gkr

New Member
I don't know about Malte's system, but on mine, libx264 was already installed and the problem still occurred. That is, a crash of obs-studio version 22.0.3 (Debian Buster) with the last message reading "Segmentation Fault" after either starting the recording with pressing "Start Recording" or the autoconfig-wizzard via "Tools" -> "Autoconfiguration Wizzard". Some lines above the Segmentation Fault message there was the following message (similar to what Malte experienced):
Code: 
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
After installing libnvidia-encode1, it works.

Currently, in Debian Buster obs-studio does neither require nor recommend libnvidia-encode1.
The requirements might depend on the video card, but could libnvidia-encode be stated at least as recommended package?
 
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