Obs fails on ArgusV4L2_Open

[nvidia1798]

Im tyring to get ob with v4l2 running

i have an device droidcam connectec to /dev/video0 and gstreamer works with that setup. In case i try to use obs it fails…

any hints are welcome!

thanks a lot!

Opening in BLOCKING MODE
[New Thread 0x7f708e77a0 (LWP 183241)]
[Thread 0x7f708e77a0 (LWP 183241) exited]
ArgusV4L2_Open failed: No such file or directory
Opening in O_NONBLOCKING MODE
info: v4l2-input: Found device 'Dummy video device (0x0000)' at /dev/video0
info: v4l2-input: Start capture from /dev/video0
Opening in BLOCKING MODE
Opening in BLOCKING MODE
[New Thread 0x7f708e77a0 (LWP 183295)]
[Thread 0x7f708e77a0 (LWP 183295) exited]
ArgusV4L2_Open failed: No such file or directory

Thread 10 "libobs: graphic" received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7f90e2e7a0 (LWP 183106)]
0x0000007f7874fdac in ?? () from /usr/lib/aarch64-linux-gnu/libv4l/plugins/nv/libv4l2_nvargus.so

[JerryChang]

@nvidia1798

Im tyring to get ob with v4l2 running

hello nvidia1798,

could you please give more details, what’s the ob you’re mentioned here.

[linuxdev]

It’s actually OBS Studio. I’m guessing it is cross compiled.

[Honey_Patouceul]

I’ve seen the same on natively built obs 27.2.4.
I think the issue is with argus v4l enumeration, especially with dummy driver of v4l2loopback that seems used by your camera software.
As workaround, you may try disabling service nvargus-daemon:

sudo systemctl stop nvargus-daemon.service

Then launch OBS and configure your V4L source(s).

When done, you may restart argus service with:

sudo systemctl start nvargus-daemon.service