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[2/2] [new port] multimedia/obs-studio
Hi,
nice to see obs-studio on OpenBSD. So I got myself an Elgato Facecam on
eBay:
on first start, went through the detection for some default values.
Then when adding source V4L2 device, I see following:
info: ---------------------------------
info: [FFmpeg aac encoder: 'test_aac'] bitrate: 32, channels: 2,
channel_layout: stereo, track: 1
info: Output 'null': stopping
info: Output 'null': Total frames output: 128
info: Output 'null': Total drawn frames: 150
[aac @ 0x2a172b17c00] Qavg: 65268.379
[aac @ 0x2a172b17c00] 2 frames left in the queue on closing
info: ---------------------------------
info: video settings reset:
base resolution: 1920x1080
output resolution: 1280x720
downscale filter: Bicubic
fps: 30/1
format: NV12
YUV mode: Rec. 709/Partial
info: NV12 texture support enabled
info: P010 texture support not available
info: ---------------------------------
info: video settings reset:
base resolution: 1920x1080
output resolution: 1280x720
downscale filter: Bicubic
fps: 30/1
format: NV12
YUV mode: Rec. 709/Partial
info: NV12 texture support enabled
info: P010 texture support not available
info:
==== Auto-config wizard testing stopping ========
info: v4l2-input: Start capture from
error: v4l2-input: Unable to open device
error: v4l2-input: Initialization failed, errno: No such file or directory
info: v4l2-input: Compiled without libudev, you can't reconnect devices
info: User added source 'Video Capture Device (V4L2)' (v4l2_input) to scene
'Scene'
info: v4l2-input: Found device 'Elgato Facecam' at /dev/video0
info: v4l2-input: Unable to open /dev/video1
info: v4l2-input: Unable to open /dev/video2
info: v4l2-input: Unable to open /dev/video3
info: v4l2-input: Found device 'Elgato Facecam' at /dev/video
info: v4l2-input: Found input 'Camera Terminal' (Index 0)
info: v4l2-input: Pixelformat: UYVY qʵ� (available)
info: v4l2-input: Pixelformat: MJPEG (available)
info: v4l2-input: Stepwise and Continuous framesizes are currently hardcoded
info: v4l2-input: Stepwise and Continuous framerates are currently hardcoded
info: v4l2-input: Pixelformat: UYVY qʵ� (available)
info: v4l2-input: Pixelformat: MJPEG (available)
info: v4l2-input: Stepwise and Continuous framesizes are currently hardcoded
info: v4l2-input: Stepwise and Continuous framerates are currently hardcoded
info: v4l2-input: Stepwise and Continuous framerates are currently hardcoded
info: v4l2-input: Start capture from /dev/video0
info: v4l2-input: Input: 0
info: v4l2-input: Resolution: 1280x720
info: v4l2-input: Pixelformat: UYVY
info: v4l2-input: Linesize: 72458704 Bytes
info: v4l2-input: Framerate: 60.00 fps
info: v4l2-input: /dev/video0: select timeout set to 83333 (5x frame
periods)
error: v4l2-input: /dev/video0: select timed out
error: v4l2-input: /dev/video0: failed to log status
error: v4l2-input: /dev/video0: select timed out
error: v4l2-input: /dev/video0: failed to log status
error: v4l2-input: /dev/video0: select timed out
error: v4l2-input: /dev/video0: failed to log status
error: v4l2-input: /dev/video0: select timed out
error: v4l2-input: /dev/video0: failed to log status
Segmentation fault (core dumped)
[New process 263378]
Core was generated by `obs'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0 memcpy (dst0=0x2a18010da20, src0=<optimized out>, length=2560) at
/usr/src/lib/libc/string/memcpy.c:103
⚠ warning: 103 /usr/src/lib/libc/string/memcpy.c: No such file or
directory
[Current thread is 1 (process 523952)]
(gdb) bt
#0 memcpy (dst0=0x2a18010da20, src0=<optimized out>, length=2560) at
/usr/src/lib/libc/string/memcpy.c:103
#1 0x000002a150e58074 in copy_frame_data_line () from
/usr/local/lib/libobs.so.0.0
#2 0x000002a150e57f7d in copy_frame_data_plane () from
/usr/local/lib/libobs.so.0.0
#3 0x000002a150e4d7a4 in copy_frame_data () from
/usr/local/lib/libobs.so.0.0
#4 0x000002a150e58351 in cache_video () from /usr/local/lib/libobs.so.0.0
#5 0x000002a150e4da42 in obs_source_output_video_internal () from
/usr/local/lib/libobs.so.0.0
#6 0x000002a150e4d92c in obs_source_output_video () from
/usr/local/lib/libobs.so.0.0
#7 0x000002a11d2e5846 in v4l2_thread () from
/usr/local/lib/obs-plugins/linux-v4l2.so
#8 0x000002a1a9d7f4d2 in _rthread_start (v=0x2a18010e420) at
/usr/src/lib/librthread/rthread.c:99
#9 0x000002a1c670c1da in __tfork_thread () at
/usr/src/lib/libc/arch/amd64/sys/tfork_thread.S:87
After editing:
~/.config/obs-studio/basic/scenes/Untitled.json
adding these settings to the sources:
"sources": [
{
"prev_ver": 536936450,
"name": "Video Capture Device (V4L2)",
"uuid": "957ef78b-9b9a-47d3-92c5-123261250a5b",
"id": "v4l2_input",
"versioned_id": "v4l2_input",
"settings": {
"device_id": "/dev/video0",
"pixelformat": 1196444237,
"framerate": -1,
"input": 0,
"resolution": 5497558139600
},
"mixers": 0,
"sync": 0,
"flags": 0,
"volume": 1.0,
"balance": 0.5,
"enabled": true,
"muted": false,
"push-to-mute": false,
"push-to-mute-delay": 0,
"push-to-talk": false,
"push-to-talk-delay": 0,
"hotkeys": {},
"deinterlace_mode": 0,
"deinterlace_field_order": 0,
"monitoring_type": 0,
"private_settings": {}
},
to force mjpeg, it starts up and doesn't crash anymore.
But then when recording, I end up with black image.
sysctl -a | grep record
kern.audio.record=1
kern.video.record=1
uvideo0 at uhub0 port 3 configuration 1 interface 0 "Elgato Elgato Facecam"
rev 3.00/4.09 addr 2
video0 at uvideo0
uhidev0 at uhub0 port 3 configuration 1 interface 2 "Elgato Elgato Facecam"
rev 3.00/4.09 addr 2
uhidev0: iclass 3/0
OpenBSD 8.0-beta (GENERIC.MP) #81: Fri Aug 7 00:19:16 MDT 2026
deraadt@amd64.openbsd.org:/usr/src/sys/arch/amd64/compile/GENERIC.MP
real mem = 34106941440 (32526MB)
avail mem = 33049112576 (31518MB)
random: good seed from bootblocks
mpath0 at root
scsibus0 at mpath0: 256 targets
mainbus0 at root
bios0 at mainbus0: SMBIOS rev. 3.6 @ 0x75c86000 (127 entries)
bios0: vendor American Megatrends International, LLC. version "0.30" date
03/26/2026
bios0: GEEKOM IX12
efi0 at bios0: UEFI 2.8
efi0: American Megatrends rev 0x5001b
acpi0 at bios0: ACPI 6.5
acpi0: sleep states S0 S5
acpi0: tables DSDT FACP FIDT MSDM SSDT SSDT SSDT SSDT SSDT HPET APIC MCFG
SSDT UEFI SDEV NHLT LPIT SSDT SSDT DBGP DBG2 DMAR FPDT SSDT SSDT SSDT SSDT
PHAT TPM2 WSMT
acpi0: wakeup devices PEGP(S4) PEGP(S4) PEGP(S4) SIO1(S3) RP09(S4) PXSX(S4)
RP10(S4) PXSX(S4) RP11(S4) PXSX(S4) RP12(S4) PXSX(S4) RP13(S4) PXSX(S4)
RP14(S4) PXSX(S4) [...]
acpitimer0 at acpi0: 3579545 Hz, 24 bits
acpihpet0 at acpi0: 19200000 Hz
acpimadt0 at acpi0 addr 0xfee00000: PC-AT compat
cpu0 at mainbus0: apid 0 (boot processor)
cpu0: Intel(R) N95, 3392.18 MHz, 06-be-00, patch 00000021
cpu0: cpuid 1
edx=bfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE>
ecx=77fafbbf<SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,EST,TM2,SSSE3,SDBG,FMA3,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,x2APIC,MOVBE,POPCNT,DEADLINE,AES,XSAVE,AVX,F16C,RDRAND>
cpu0: cpuid 6 eax=578ff7<SENSOR,ARAT,PTS> ecx=9<EFFFREQ>
cpu0: cpuid 7.0
ebx=239ca7eb<FSGSBASE,TSC_ADJUST,BMI1,AVX2,SMEP,BMI2,ERMS,INVPCID,RDSEED,ADX,SMAP,CLFLUSHOPT,CLWB,PT,SHA>
ecx=98c007ac<UMIP,PKU,WAITPKG,PKS>
edx=fc184410<MD_CLEAR,IBT,IBRS,IBPB,STIBP,L1DF,SSBD>
cpu0: cpuid a vers=5, gp=6, gpwidth=48, ff=3, ffwidth=48
cpu0: cpuid d.1 eax=f<XSAVEOPT,XSAVEC,XGETBV1,XSAVES>
cpu0: cpuid 80000001 edx=2c100800<NXE,PAGE1GB,RDTSCP,LONG>
ecx=121<LAHF,ABM,3DNOWP>
cpu0: cpuid 80000007 edx=100<ITSC>
cpu0: msr
10a=15c0fd6b<IBRS_ALL,SKIP_L1DFL,MDS_NO,IF_PSCHANGE,TAA_NO,MISC_PKG_CT,ENERGY_FILT,DOITM,SBDR_SSDP_N,FBSDP_NO,PSDP_NO,OVERCLOCK,PBRSB_NO,GDS_NO,RFDS_CLEAR>
cpu0: 32KB 64b/line 8-way D-cache, 64KB 64b/line 8-way I-cache, 2MB
64b/line 16-way L2 cache, 6MB 64b/line 12-way L3 cache
cpu0: smt 0, core 0, package 0, type E
mtrr: Pentium Pro MTRR support, 10 var ranges, 88 fixed ranges
cpu0: apic clock running at 38MHz
cpu0: mwait min=64, max=64, C-substates=0.2.0.2.0.1.0.1, IBE
cpu1 at mainbus0: apid 2 (application processor)
cpu1: Intel(R) N95, 3392.18 MHz, 06-be-00, patch 00000021
cpu1: smt 0, core 1, package 0, type E
cpu2 at mainbus0: apid 4 (application processor)
cpu2: Intel(R) N95, 2693.79 MHz, 06-be-00, patch 00000021
cpu2: smt 0, core 2, package 0, type E
cpu3 at mainbus0: apid 6 (application processor)
cpu3: Intel(R) N95, 2693.79 MHz, 06-be-00, patch 00000021
cpu3: smt 0, core 3, package 0, type E
ioapic0 at mainbus0: apid 2 pa 0xfec00000, version 20, 120 pins
acpimcfg0 at acpi0
acpimcfg0: addr 0xc0000000, bus 0-255
acpiprt0 at acpi0: bus 0 (PC00)
acpiprt1 at acpi0: bus 33 (RP09)
acpiprt2 at acpi0: bus 32 (RP10)
acpiprt3 at acpi0: bus -1 (RP11)
acpiprt4 at acpi0: bus -1 (RP12)
acpiprt5 at acpi0: bus -1 (RP13)
acpiprt6 at acpi0: bus -1 (RP14)
acpiprt7 at acpi0: bus -1 (RP15)
acpiprt8 at acpi0: bus -1 (RP16)
acpiprt9 at acpi0: bus -1 (RP01)
acpiprt10 at acpi0: bus -1 (RP02)
acpiprt11 at acpi0: bus 1 (RP03)
acpiprt12 at acpi0: bus 35 (RP04)
acpiprt13 at acpi0: bus -1 (RP05)
acpiprt14 at acpi0: bus -1 (RP06)
acpiprt15 at acpi0: bus 34 (RP07)
acpiprt16 at acpi0: bus -1 (RP08)
acpiprt17 at acpi0: bus -1 (RP17)
acpiprt18 at acpi0: bus -1 (RP18)
acpiprt19 at acpi0: bus -1 (RP19)
acpiprt20 at acpi0: bus -1 (RP20)
acpiprt21 at acpi0: bus -1 (RP21)
acpiprt22 at acpi0: bus -1 (RP22)
acpiprt23 at acpi0: bus -1 (RP23)
acpiprt24 at acpi0: bus -1 (RP24)
acpiec0 at acpi0: not present
acpipci0 at acpi0 PC00: 0x00000000 0x00000011 0x00000001
com0 at acpi0 UAR1 addr 0x3f8/0x8 irq 4: ns16550a, 16 byte fifo
"OVTI01AS" at acpi0 not configured
"OVTID858" at acpi0 not configured
"TXNW3643" at acpi0 not configured
"TXNW3643" at acpi0 not configured
"ACPI000E" at acpi0 not configured
pchgpio0 at acpi0 GPI0 addr 0xfd6e0000/0x10000 0xfd6d0000/0x10000
0xfd6a0000/0x10000 0xfd690000/0x10000 irq 14, 384 pins
acpibtn0 at acpi0: SLPB
acpicpu0 at acpi0: C3(200@1048 mwait.1@0x60), C2(350@127 mwait.1@0x21),
C1(1000@1 mwait.1), PSS
acpicpu1 at acpi0: C3(200@1048 mwait.1@0x60), C2(350@127 mwait.1@0x21),
C1(1000@1 mwait.1), PSS
acpicpu2 at acpi0: C3(200@1048 mwait.1@0x60), C2(350@127 mwait.1@0x21),
C1(1000@1 mwait.1), PSS
acpicpu3 at acpi0: C3(200@1048 mwait.1@0x60), C2(350@127 mwait.1@0x21),
C1(1000@1 mwait.1), PSS
"PNP0C14" at acpi0 not configured
"PNP0C14" at acpi0 not configured
intelpmc0 at acpi0: PEPD
state 0: 0x7f:1:2:0x00:0x0000000000000060
counter: 0x7f:64:0:0x00:0x0000000000000632
frequency: 0
state 1: 0x7f:1:2:0x00:0x0000000000000060
counter: 0x00:32:0:0x03:0x00000000fe00193c
frequency: 8197
"INTC1070" at acpi0 not configured
acpibtn1 at acpi0: PWRB
tpm0 at acpi0 TPM_ 2.0 (TIS) addr 0xfed40000/0x5000, device 0x001d15d1 rev
0x36
acpipwrres0 at acpi0: WRST
acpipwrres1 at acpi0: TBT0, resource for TDM0, TRP0, TRP1
acpipwrres2 at acpi0: TBT1, resource for TDM1, TRP2, TRP3
acpipwrres3 at acpi0: D3C_, resource for TXHC, TDM0, TDM1, TRP0, TRP1,
TRP2, TRP3
acpipwrres4 at acpi0: FN00
acpipwrres5 at acpi0: FN01
acpipwrres6 at acpi0: FN02
acpipwrres7 at acpi0: FN03
acpipwrres8 at acpi0: FN04
acpitz0 at acpi0
acpitz0: critical temperature is 110 degC
acpipwrres9 at acpi0: PIN_
acpivideo0 at acpi0: GFX0
acpivout0 at acpivideo0: DD1F
acpivout1 at acpivideo0: DD2F
cpu0: using VERW MDS workaround
cpu0: Enhanced SpeedStep 3392 MHz: speeds: 1701, 1700, 1600, 1500, 1400,
1300, 1200, 1100, 1000, 900, 800 MHz
pci0 at mainbus0 bus 0
0:31:5: mem address conflict 0xfe010000/0x1000
pchb0 at pci0 dev 0 function 0 vendor "Intel", unknown product 0x4618 rev
0x00
inteldrm0 at pci0 dev 2 function 0 "Intel Graphics" rev 0x00
drm0 at inteldrm0
inteldrm0: msi, ALDERLAKE_P, gen 12
"Intel ADL-N GNA" rev 0x00 at pci0 dev 8 function 0 not configured
"Intel Core 12G CL" rev 0x01 at pci0 dev 10 function 0 not configured
xhci0 at pci0 dev 13 function 0 "Intel ADL-N xHCI" rev 0x00: msi, xHCI 1.20
usb0 at xhci0: USB revision 3.0
uhub0 at usb0 configuration 1 interface 0 "Intel xHCI root hub" rev
3.00/1.00 addr 1
xhci1 at pci0 dev 20 function 0 "Intel ADL-N xHCI" rev 0x00: msi, xHCI 1.20
usb1 at xhci1: USB revision 3.0
uhub1 at usb1 configuration 1 interface 0 "Intel xHCI root hub" rev
3.00/1.00 addr 1
"Intel ADL-N SRAM" rev 0x00 at pci0 dev 20 function 2 not configured
dwiic0 at pci0 dev 21 function 0 "Intel ADL-N I2C" rev 0x00: apic 2 int 27
iic0 at dwiic0
dwiic1 at pci0 dev 21 function 1 "Intel ADL-N I2C" rev 0x00: apic 2 int 40
iic1 at dwiic1
"Intel ADL-N HECI" rev 0x00 at pci0 dev 22 function 0 not configured
ahci0 at pci0 dev 23 function 0 "Intel ADL-N AHCI" rev 0x00: msi, AHCI 1.3.1
ahci0: port 0: 6.0Gb/s
ahci0: PHY offline on port 1
scsibus1 at ahci0: 32 targets
sd0 at scsibus1 targ 0 lun 0: <ATA, Verbatim Vi560, W070>
t10.ATA_Verbatim_Vi560_493634108893991_
sd0: 488386MB, 512 bytes/sector, 1000215216 sectors, thin
dwiic2 at pci0 dev 25 function 0 "Intel ADL-N I2C" rev 0x00: apic 2 int 31
iic2 at dwiic2
dwiic3 at pci0 dev 25 function 1 "Intel ADL-N I2C" rev 0x00: apic 2 int 32
iic3 at dwiic3
sdhc0 at pci0 dev 26 function 0 "Intel ADL-N eMMC" rev 0x00: apic 2 int 16
sdhc0: SDHC 3.00, 200 MHz base clock
sdmmc0 at sdhc0: 8-bit, sd high-speed, mmc high-speed, ddr52, dma
ppb0 at pci0 dev 28 function 0 "Intel ADL-N PCIE" rev 0x00: msi
pci1 at ppb0 bus 1
"MediaTek MT7920" rev 0x00 at pci1 dev 0 function 0 not configured
ppb1 at pci0 dev 28 function 3 "Intel ADL-N PCIE" rev 0x00: msi
pci2 at ppb1 bus 35
igc0 at pci2 dev 0 function 0 "Intel I226-V" rev 0x04, msix, 4 queues,
address 38:f7:cd:d3:df:90
ppb2 at pci0 dev 28 function 6 "Intel ADL-N PCIE" rev 0x00: msi
pci3 at ppb2 bus 34
igc1 at pci3 dev 0 function 0 "Intel I226-V" rev 0x04, msix, 4 queues,
address 38:f7:cd:d9:13:e2
ppb3 at pci0 dev 29 function 0 "Intel ADL-N PCIE" rev 0x00: msi
pci4 at ppb3 bus 33
igc2 at pci4 dev 0 function 0 "Intel I226-V" rev 0x04, msix, 4 queues,
address 38:f7:cd:d9:13:dc
ppb4 at pci0 dev 29 function 1 "Intel ADL-N PCIE" rev 0x00: msi
pci5 at ppb4 bus 32
igc3 at pci5 dev 0 function 0 "Intel I226-V" rev 0x04, msix, 4 queues,
address 38:f7:cd:d9:13:dd
"Intel ADL-N UART" rev 0x00 at pci0 dev 30 function 0 not configured
"Intel ADL-N GSPI" rev 0x00 at pci0 dev 30 function 3 not configured
pcib0 at pci0 dev 31 function 0 vendor "Intel", unknown product 0x5482 rev
0x00
azalia0 at pci0 dev 31 function 3 "Intel ADL-N HD Audio" rev 0x00: msi
azalia0: codecs: Realtek ALC269
audio0 at azalia0
ichiic0 at pci0 dev 31 function 4 "Intel ADL-N SMBus" rev 0x00: apic 2 int
16
iic4 at ichiic0
iic4: addr 0x4a 15=2c 16=20 19=04 1b=05 1c=60 1e=60 1f=60 20=89 21=78 22=63
25=78 26=63 27=78 28=63 29=b0 2a=bb 2b=42 2c=20 2d=22 2e=04 2f=5a 32=80
34=0e 3b=04 3c=0b 3d=2a words 00=0000 01=0000 02=0000 03=0000 04=0000
05=0000 06=0000 07=0000
"eeprom" at iic4 addr 0x52 not configured
"Intel ADL-N SPI" rev 0x00 at pci0 dev 31 function 5 not configured
isa0 at pcib0
isadma0 at isa0
pcppi0 at isa0 port 0x61
spkr0 at pcppi0
vmm0 at mainbus0: VMX/EPT
efifb at mainbus0 not configured
enable mbufs in high memory
scsibus2 at sdmmc0: 2 targets, initiator 0
sd1 at scsibus2 targ 1 lun 0: <SD/MMC, C9A611, 0000> removable
sd1: 59680MB, 512 bytes/sector, 122224640 sectors
uvideo0 at uhub0 port 3 configuration 1 interface 0 "Elgato Elgato Facecam"
rev 3.00/4.09 addr 2
video0 at uvideo0
uhidev0 at uhub0 port 3 configuration 1 interface 2 "Elgato Elgato Facecam"
rev 3.00/4.09 addr 2
uhidev0: iclass 3/0
uhid0 at uhidev0: input=1024, output=1024, feature=0
uhidev1 at uhub1 port 1 configuration 1 interface 0 "YICHIP Wireless
Device" rev 2.00/0.02 addr 2
uhidev1: iclass 3/1
ukbd0 at uhidev1: 8 variable keys, 6 key codes
wskbd0 at ukbd0: console keyboard
uhidev2 at uhub1 port 1 configuration 1 interface 1 "YICHIP Wireless
Device" rev 2.00/0.02 addr 2
uhidev2: iclass 3/1, 3 report ids
ums0 at uhidev2 reportid 1: 5 buttons, Z and W dir
wsmouse0 at ums0 mux 0
uhid1 at uhidev2 reportid 2: input=1, output=0, feature=0
ucc0 at uhidev2 reportid 3: 897 usages, 20 keys, array
wskbd1 at ucc0 mux 1
uhidev3 at uhub1 port 3 configuration 1 interface 0 "CHESEN PS2 to USB
Converter" rev 1.10/0.10 addr 3
uhidev3: iclass 3/1
ukbd1 at uhidev3: 8 variable keys, 6 key codes
wskbd2 at ukbd1 mux 1
uhidev4 at uhub1 port 3 configuration 1 interface 1 "CHESEN PS2 to USB
Converter" rev 1.10/0.10 addr 3
uhidev4: iclass 3/1, 3 report ids
ums1 at uhidev4 reportid 1: 5 buttons, Z dir
wsmouse1 at ums1 mux 0
uhid2 at uhidev4 reportid 2: input=1, output=0, feature=0
ucc1 at uhidev4 reportid 3: 5 usages, 4 keys, array
wskbd3 at ucc1 mux 1
ugen0 at uhub1 port 8 "MediaTek Inc. Wireless_Device" rev 2.10/1.00 addr 4
vscsi0 at root
scsibus3 at vscsi0: 256 targets
softraid0 at root
scsibus4 at softraid0: 256 targets
root on sd0a (f9a15cb6ebb9857c.a) swap on sd0b dump on sd0b
inteldrm0: 3440x1440, 32bpp
wsdisplay0 at inteldrm0 mux 1: console (std, vt100 emulation), using wskbd0
wskbd1: connecting to wsdisplay0
wskbd2: connecting to wsdisplay0
wskbd3: connecting to wsdisplay0
wsdisplay0: screen 1-5 added (std, vt100 emulation)
uaudio0 at uhub1 port 4 configuration 1 interface 1 "MOTU M2" rev 2.00/2.01
addr 5
uaudio0: class v2, high-speed, sync, channels: 2 play, 2 rec, 0 ctls
audio1 at uaudio0
umidi0 at uhub1 port 4 configuration 1 interface 4 "MOTU M2" rev 2.00/2.01
addr 5
umidi0: (genuine USB-MIDI)
umidi0: out=1, in=1
midi0 at umidi0: <USB MIDI I/F>
umodem0 at uhub1 port 4 configuration 1 interface 5 "MOTU M2" rev 2.00/2.01
addr 5
umodem0: data interface 6, has no CM over data, has no break
umodem0: status change notification available
ucom0 at umodem0: usb1.0.00004.6
ugen1 at uhub1 port 4 configuration 1 "MOTU M2" rev 2.00/2.01 addr 5
audio1 detached
uaudio0 detached
midi0 detached
umidi0 detached
ucom0 detached
umodem0 detached
ugen1 detached
uaudio0 at uhub1 port 4 configuration 1 interface 1 "MOTU M2" rev 2.00/2.01
addr 5
uaudio0: class v2, high-speed, sync, channels: 2 play, 2 rec, 0 ctls
audio1 at uaudio0
umidi0 at uhub1 port 4 configuration 1 interface 4 "MOTU M2" rev 2.00/2.01
addr 5
umidi0: (genuine USB-MIDI)
umidi0: out=1, in=1
midi0 at umidi0: <USB MIDI I/F>
umodem0 at uhub1 port 4 configuration 1 interface 5 "MOTU M2" rev 2.00/2.01
addr 5
umodem0: data interface 6, has no CM over data, has no break
umodem0: status change notification available
ucom0 at umodem0: usb1.0.00004.6
ugen1 at uhub1 port 4 configuration 1 "MOTU M2" rev 2.00/2.01 addr 5
audio1 detached
uaudio0 detached
midi0 detached
umidi0 detached
ucom0 detached
umodem0 detached
ugen1 detached
uaudio0 at uhub1 port 4 configuration 1 interface 1 "MOTU M2" rev 2.00/2.01
addr 5
uaudio0: class v2, high-speed, sync, channels: 2 play, 2 rec, 0 ctls
audio1 at uaudio0
umidi0 at uhub1 port 4 configuration 1 interface 4 "MOTU M2" rev 2.00/2.01
addr 5
umidi0: (genuine USB-MIDI)
umidi0: out=1, in=1
midi0 at umidi0: <USB MIDI I/F>
umodem0 at uhub1 port 4 configuration 1 interface 5 "MOTU M2" rev 2.00/2.01
addr 5
umodem0: data interface 6, has no CM over data, has no break
umodem0: status change notification available
ucom0 at umodem0: usb1.0.00004.6
ugen1 at uhub1 port 4 configuration 1 "MOTU M2" rev 2.00/2.01 addr 5
so finally I made some tests with ffmpeg:
ffmpeg -f v4l2 -input_format mjpeg -framerate 30 -video_size 1280x720 -i
/dev/video0 -vcodec copy -f null -
still reported some dropped frames, The next then worked flawlessly:
ffmpeg -f v4l2 -input_format mjpeg -framerate 30 -video_size 960x540 -i
/dev/video0 -vcodec copy -f null -
so I updated the Untitled.json again to:
"name": "Untitled",
"sources": [
{
"prev_ver": 536936450,
"name": "Video Capture Device (V4L2)",
"uuid": "957ef78b-9b9a-47d3-92c5-123261250a5b",
"id": "v4l2_input",
"versioned_id": "v4l2_input",
"settings": {
"device_id": "/dev/video0",
"input": 0,
"pixelformat": 1196444237,
"resolution": 4123168604700,
"framerate": 10000000,
"color_range": 1
},
"mixers": 0,
"sync": 0,
"flags": 0,
"volume": 1.0,
"balance": 0.5,
"enabled": true,
"muted": false,
"push-to-mute": false,
"push-to-mute-delay": 0,
"push-to-talk": false,
"push-to-talk-delay": 0,
"hotkeys": {},
"deinterlace_mode": 0,
"deinterlace_field_order": 0,
"monitoring_type": 0,
"private_settings": {}
},
and then obs was able to record the video stream nicely.
just running "video" worked like a charm as well.
attached console output of obs starting up, opening the cameras properties,
and recording a short video.
cheers,
Sebastian
On Thu, Aug 6, 2026 at 3:59 PM Stuart Henderson <stu@spacehopper.org> wrote:
> On 2026/08/04 15:28, Daniil Ryvkin wrote:
> > You were right, adding -L to the linker flags was all that was needed.
>
> great. thanks for sticking with it after feedback :)
>
> two things I noticed reading through,
>
> - simple tweak that can be done by whoever imports (i.e. no need to send
> a new tar): drop "WWW: https://obsproject.com/" from pkg/DESCR, OpenBSD
> adds this automatically from HOMEPAGE
>
> with that, it's ok sthen to import.
>
>
> the other is not a blocker but would be nice to do after import:
>
> - in the patch to frontend/utility/platform-x11.cpp, it would be
> better to use XDG_RUNTIME_DIR from the environment if available.
> setusercontext() tries to create the dir with user-restricted
> permissions and sets that var if ok, so it's a safer choice
> than /tmp/obs-studio.lock.<euid>.
>
>
--
https://buzzdeee.reitenba.ch
[2/2] [new port] multimedia/obs-studio