Bug Report [SOLVED] Instant CRASH - symbol lookup error: obs: undefined symbol

[ubuntuaddicted]

so yesterday I compiled obs-studio from git and now when ever I try to add a new scene it insta-crashes. it will also insta-crash when I try to change my x264 preset from it's current medium setting to anything else. Here's the terminal output of launching obs and trying to add a new scene

obs
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/license/gplv2.txt
Attempted path: /usr/share/obs/obs-studio/license/gplv2.txt
QObject::connect: invalid null parameter
info: OBS 0.5.1-123-g4e308c9 (linux)
info: Processor: 4 logical cores
info: Processor: Intel(R) Core(TM) i5-4670K CPU @ 3.40GHz
info: Physical Memory: 7929MB Total
info: Kernel Version: Linux 3.13.0-35-generic
info: Distribution: "Ubuntu" "14.04"
info: audio settings reset:
    samples per sec: 44100
    speakers:        2
    buffering (ms):  1000

info: X and Y: 909 475
Backbuffers: 2
Color Format: 3
ZStencil Format: 0
Adapter: 0

info: OpenGL version: 3.2.0 NVIDIA 343.22

info: Created new platform data
info: convert_sampler_info: 1 <= max_anisotropy <= 16 violated, selected: 0, set: 1
info: convert_sampler_info: 1 <= max_anisotropy <= 16 violated, selected: 0, set: 1
info: convert_sampler_info: 1 <= max_anisotropy <= 16 violated, selected: 0, set: 1
info: convert_sampler_info: 1 <= max_anisotropy <= 16 violated, selected: 0, set: 1
info: convert_sampler_info: 1 <= max_anisotropy <= 16 violated, selected: 0, set: 1
info: convert_sampler_info: 1 <= max_anisotropy <= 16 violated, selected: 0, set: 1
info: convert_sampler_info: 1 <= max_anisotropy <= 16 violated, selected: 0, set: 1
info: convert_sampler_info: 1 <= max_anisotropy <= 16 violated, selected: 0, set: 1
info: convert_sampler_info: 1 <= max_anisotropy <= 16 violated, selected: 0, set: 1
info: convert_sampler_info: 1 <= max_anisotropy <= 16 violated, selected: 0, set: 1
info: video settings reset:
    base resolution:   1920x1080
    output resolution: 1280x720
    fps:               30/1
info: output 'default_file_output' (flv_output) created
info: output 'default_stream' (rtmp_output) created
info: encoder 'default_h264' (obs_x264) created
info: encoder 'default_aac' (libfdk_aac) created
info: service 'default_service' (rtmp_custom) created
info: pulse-input: Server name: 'pulseaudio 4.0'
info: pulse-input: Audio format: s16le, 44100 Hz, 2 channels
info: pulse-input: Started recording from 'alsa_output.pci-0000_00_1b.0.analog-stereo.monitor'
info: source 'Desktop Audio' (pulse_output_capture) created
info: pulse-input: Server name: 'pulseaudio 4.0'
info: pulse-input: Audio format: s16le, 48000 Hz, 1 channels
info: pulse-input: Started recording from 'alsa_input.usb-046d_081a_13339CA0-02-U0x46d0x81a.analog-mono'
info: source 'Mic/Aux' (pulse_input_capture) created
info: source 'Scene' (scene) created
info: xshm-input: Geometry 1920x1080 @ 1680,0
info: source 'Screen Capture (XSHM)' (xshm_input) created
info: source 'overlay' (image_source) created
info: source 'be right back' (scene) created
info: source 'be right back pic' (image_source) created
error: xcompcap: XCompositeNameWindowPixmap failed: BadMatch (invalid parameter attributes)
info: source 'webcam' (xcomposite_input) created
info: Update check: latest version is: 0.4.0
obs: symbol lookup error: obs: undefined symbol: _ZN7QString13toUtf8_helperERKS_

This is very bad, I wasn't having these insta-crashes before when I was using the official ubuntu ppa. Can anyone please help?

 

[Lain]

I'm guessing that your system is somehow using a much different Qt build than the one expected by the PPA. That's pretty much the only hint I can give because it's failing to load the Qt library.

 

[ubuntuaddicted]

i'm using the latest Qt5 from the official Qt5 website, I think it was 5.3. I had to modify my cmakecache.txt file to point to the Qt5Widgets, Qt5Network, and Qt5X11Extras applicable folders stored within my home drive. I don't know of any other way to get it to compile? I thought it was you who had documented this procedure within the obs redux thread when someone was having an issue compiling in OS X mavericks. Here's the thread about the error I was getting when trying to compile from git within standard ubuntu. https://obsproject.com/forum/threads/solved-compiling-in-xubuntu-14-04-qt5widgets-missing.20019/

 

[ubuntuaddicted]

i got everything sorted, even though I had installed and mapped paths for qt5 obs compiled BUT didn't really work because qt5 widgets weren't working so no new dialog boxes could appear. I documented my entire struggle over in the thread I linked in my last post.