So what happens when you run it from a terminal?

$ obs

** (obs:5468): WARNING **: Couldn't connect to accessibility bus: Failed to connect to socket /tmp/dbus-lK3NuAtjBH: Connection refused
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/Default.qss
Attempted path: /usr/share/obs/obs-studio/themes/Default.qss
Attempted path: share/obs/obs-studio/license/gplv2.txt
Attempted path: /usr/share/obs/obs-studio/license/gplv2.txt
info: Processor: 4 logical cores
info: Processor: Intel(R) Core(TM) i3 CPU M 370 @ 2.40GHz
info: Physical Memory: 3731MB Total
info: Kernel Version: Linux 4.11.9-1-ARCH
info: Distribution: "Arch Linux" Unknown
info: Portable mode: false
info: OBS 19.0.3-1 (linux)
info: ---------------------------------
info: ---------------------------------
info: audio settings reset:
samples per sec: 44100
speakers: 2
info: ---------------------------------
info: Initializing OpenGL...
error: X Error: GLXBadFBConfig
error: Failed to create OpenGL context.
error: Failed to create context!
error: device_create (GL) failed
Segmentation fault (core dumped)

So your OpenGL setup is screwed up. What drivers?

graphic driver is mesa lib32-mesa xf86-video-intel vulkan-intel

$ lspci -v
00:00.0 Host bridge: Intel Corporation Core Processor DRAM Controller (rev 02)
Subsystem: Hewlett-Packard Company Device 149b
Flags: bus master, fast devsel, latency 0
Capabilities: <access denied>
Kernel modules: intel_agp

00:02.0 VGA compatible controller: Intel Corporation Core Processor Integrated Graphics Controller (rev 02) (prog-if 00 [VGA controller])
Subsystem: Hewlett-Packard Company Device 149b
Flags: bus master, fast devsel, latency 0, IRQ 31
Memory at d0000000 (64-bit, non-prefetchable) [size=4M]
Memory at c0000000 (64-bit, prefetchable) [size=256M]
I/O ports at 3030 [size=8]
[virtual] Expansion ROM at 000c0000 [disabled] [size=128K]
Capabilities: <access denied>
Kernel driver in use: i915
Kernel modules: i915

00:16.0 Communication controller: Intel Corporation 5 Series/3400 Series Chipset HECI Controller (rev 06)
Subsystem: Hewlett-Packard Company Device 149b
Flags: bus master, fast devsel, latency 0, IRQ 29
Memory at d0904000 (64-bit, non-prefetchable) [size=16]
Capabilities: <access denied>
Kernel driver in use: mei_me
Kernel modules: mei_me

00:1a.0 USB controller: Intel Corporation 5 Series/3400 Series Chipset USB2 Enhanced Host Controller (rev 05) (prog-if 20 [EHCI])
Subsystem: Hewlett-Packard Company Device 149b
Flags: bus master, medium devsel, latency 0, IRQ 16
Memory at d0909000 (32-bit, non-prefetchable) [size=1K]
Capabilities: <access denied>
Kernel driver in use: ehci-pci
Kernel modules: ehci_pci

00:1b.0 Audio device: Intel Corporation 5 Series/3400 Series Chipset High Definition Audio (rev 05)
Subsystem: Hewlett-Packard Company Device 149b
Flags: bus master, fast devsel, latency 0, IRQ 28
Memory at d0900000 (64-bit, non-prefetchable) [size=16K]
Capabilities: <access denied>
Kernel driver in use: snd_hda_intel
Kernel modules: snd_hda_intel

00:1c.0 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 1 (rev 05) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0, IRQ 24
Bus: primary=00, secondary=01, subordinate=01, sec-latency=0
I/O behind bridge: None
Memory behind bridge: d0800000-d08fffff [size=1M]
Prefetchable memory behind bridge: None
Capabilities: <access denied>
Kernel driver in use: pcieport
Kernel modules: shpchp

00:1c.3 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 4 (rev 05) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0, IRQ 25
Bus: primary=00, secondary=02, subordinate=02, sec-latency=0
I/O behind bridge: None
Memory behind bridge: d0700000-d07fffff [size=1M]
Prefetchable memory behind bridge: None
Capabilities: <access denied>
Kernel driver in use: pcieport
Kernel modules: shpchp

00:1c.5 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 6 (rev 05) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0, IRQ 26
Bus: primary=00, secondary=03, subordinate=03, sec-latency=0
I/O behind bridge: 00002000-00002fff [size=4K]
Memory behind bridge: d0600000-d06fffff [size=1M]
Prefetchable memory behind bridge: 00000000d0400000-00000000d04fffff [size=1M]
Capabilities: <access denied>
Kernel driver in use: pcieport
Kernel modules: shpchp

00:1d.0 USB controller: Intel Corporation 5 Series/3400 Series Chipset USB2 Enhanced Host Controller (rev 05) (prog-if 20 [EHCI])
Subsystem: Hewlett-Packard Company Device 149b
Flags: bus master, medium devsel, latency 0, IRQ 20
Memory at d0908000 (32-bit, non-prefetchable) [size=1K]
Capabilities: <access denied>
Kernel driver in use: ehci-pci
Kernel modules: ehci_pci

00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev a5) (prog-if 01 [Subtractive decode])
Flags: bus master, fast devsel, latency 0
Bus: primary=00, secondary=04, subordinate=04, sec-latency=64
I/O behind bridge: None
Memory behind bridge: d0500000-d05fffff [size=1M]
Prefetchable memory behind bridge: None
Capabilities: <access denied>

00:1f.0 ISA bridge: Intel Corporation HM57 Chipset LPC Interface Controller (rev 05)
Subsystem: Hewlett-Packard Company Device 149b
Flags: bus master, medium devsel, latency 0
Capabilities: <access denied>
Kernel driver in use: lpc_ich
Kernel modules: lpc_ich

00:1f.2 SATA controller: Intel Corporation 5 Series/3400 Series Chipset 6 port SATA AHCI Controller (rev 05) (prog-if 01 [AHCI 1.0])
Subsystem: Hewlett-Packard Company Device 149b
Flags: bus master, 66MHz, medium devsel, latency 0, IRQ 27
I/O ports at 3028 [size=8]
I/O ports at 303c [size=4]
I/O ports at 3020 [size=8]
I/O ports at 3038 [size=4]
I/O ports at 3000 [size=32]
Memory at d0907000 (32-bit, non-prefetchable) [size=2K]
Capabilities: <access denied>
Kernel driver in use: ahci
Kernel modules: ahci

00:1f.6 Signal processing controller: Intel Corporation 5 Series/3400 Series Chipset Thermal Subsystem (rev 05)
Subsystem: Hewlett-Packard Company Device 149b
Flags: bus master, fast devsel, latency 0, IRQ 10
Memory at d0906000 (64-bit, non-prefetchable) [size=4K]
Capabilities: <access denied>
Kernel modules: intel_ips

02:00.0 Network controller: Broadcom Limited BCM4313 802.11bgn Wireless Network Adapter (rev 01)
Subsystem: Hewlett-Packard Company Device 145c
Flags: bus master, fast devsel, latency 0, IRQ 19
Memory at d0700000 (64-bit, non-prefetchable) [size=16K]
Capabilities: <access denied>
Kernel driver in use: bcma-pci-bridge
Kernel modules: bcma

03:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 03)
Subsystem: Hewlett-Packard Company Device 149b
Physical Slot: 5
Flags: bus master, fast devsel, latency 0, IRQ 30
I/O ports at 2000 [size=256]
Memory at d0404000 (64-bit, prefetchable) [size=4K]
Memory at d0400000 (64-bit, prefetchable) [size=16K]
Expansion ROM at d0600000 [disabled] [size=128K]
Capabilities: <access denied>
Kernel driver in use: r8169
Kernel modules: r8169

ff:00.0 Host bridge: Intel Corporation Core Processor QuickPath Architecture Generic Non-core Registers (rev 02)
Subsystem: Intel Corporation Device 8086
Flags: bus master, fast devsel, latency 0

ff:00.1 Host bridge: Intel Corporation Core Processor QuickPath Architecture System Address Decoder (rev 02)
Subsystem: Intel Corporation Device 8086
Flags: bus master, fast devsel, latency 0

ff:02.0 Host bridge: Intel Corporation Core Processor QPI Link 0 (rev 02)
Subsystem: Intel Corporation Device 8086
Flags: bus master, fast devsel, latency 0

ff:02.1 Host bridge: Intel Corporation 1st Generation Core i3/5/7 Processor QPI Physical 0 (rev 02)
Subsystem: Intel Corporation Device 8086
Flags: bus master, fast devsel, latency 0

ff:02.2 Host bridge: Intel Corporation 1st Generation Core i3/5/7 Processor Reserved (rev 02)
Subsystem: Intel Corporation Device 8086
Flags: bus master, fast devsel, latency 0

ff:02.3 Host bridge: Intel Corporation 1st Generation Core i3/5/7 Processor Reserved (rev 02)
Subsystem: Intel Corporation Device 8086
Flags: bus master, fast devsel, latency 0

I believe the hardware requirements are quite strict. If you have fairly old hardware it might not run. Check upstream if you meet their requirements and report back here if you do.

I got a crash despite having a Skylake processor. Different from OP in that it successfully creates the OpenGL context.

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/Default.qss
Attempted path: /usr/share/obs/obs-studio/themes/Default.qss
Attempted path: share/obs/obs-studio/license/gplv2.txt
Attempted path: /usr/share/obs/obs-studio/license/gplv2.txt
info: Processor: 4 logical cores
info: Processor: Intel(R) Core(TM) i7-6500U CPU @ 2.50GHz
info: Physical Memory: 7732MB Total
info: Kernel Version: Linux 4.12.2-1-ARCH
info: Distribution: "Arch Linux" Unknown
info: Portable mode: false
info: OBS 19.0.3-1 (linux)
info: ---------------------------------
info: ---------------------------------
info: audio settings reset:
samples per sec: 44100
speakers: 2
info: ---------------------------------
info: Initializing OpenGL...
info: OpenGL version: 4.5 (Core Profile) Mesa 17.1.5
info: ---------------------------------
info: video settings reset:
base resolution: 1280x720
output resolution: 1280x720
downscale filter: Bicubic
fps: 30/1
format: NV12
info: ---------------------------------
[1] 16193 segmentation fault (core dumped) obs

I think you'll have better luck reporting this issue upstream. Then provide a link to the upstream issue here.