Package: obs-studio
Version: 30.2.3+dfsg-2+b5
Severity: important
X-Debbugs-Cc: deb...@maat.me

Dear Maintainer,

Since around 1 week obs started to crash when starting the virtual camer (just
click on the button "start virtual camera" on the main interface).

The click on this button runs the commande  sudo modprobe v4l2loopback
exclusive_caps=1 card_label="OBS Virtual Camera"

At first click (for example after a reboot of if sudo rmmod   whas executed) a
password window pops up to type sudo password. If the password is correct obs
coredumps.

If obs was run from a console you can see this kind of message :
> double free or corruption (out)
> Abandon (core dumped)

After that running again obs and trying to start de virtual camera raises an
error but the virtual cam does not activate. And if obs was run from a console
you can see this kind of message :

> error: Failed to start streaming on '/dev/video6' (Invalid argument)
> warning: Failed to start virtual camera

I tried to run sudo rmmmod v4l2loopback then sudo sudo modprobe v4l2loopback
exclusive_caps=1 card_label="OBS Virtual Camera" then start obs : i fall into
the "failed to start" error message

I tried to run sudo rmmmod v4l2loopback then run obs then click start virtual
cam then type in a console sudo sudo modprobe v4l2loopback exclusive_caps=1
card_label="OBS Virtual Camera" : i fall into coredump case

I tried to run sudo rmmmod v4l2loopback then run obs then type in a console
sudo sudo modprobe v4l2loopback exclusive_caps=1 card_label="OBS Virtual
Camera" (without clicking on the button to start virtual cam) : i fall into
coredump case so clicking on the button does not have impact

This is really a problem because nowadays with video conferences the virtual
cam feature of OBS is one of its most used features.

Good luck to investigate this.
Maât


-- System Information:
Debian Release: trixie/sid
  APT prefers testing
  APT policy: (500, 'testing')
Architecture: amd64 (x86_64)

Kernel: Linux 6.12.20-amd64 (SMP w/22 CPU threads; PREEMPT)
Kernel taint flags: TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE
Locale: LANG=fr_FR.UTF-8, LC_CTYPE=fr_FR.UTF-8 (charmap=UTF-8), 
LANGUAGE=fr:en_US
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages obs-studio depends on:
ii  libavcodec-extra61 [libavcodec61]  7:7.1.1-1+b1
ii  libavdevice61                      7:7.1.1-1+b1
ii  libavformat61                      7:7.1.1-1+b1
ii  libavutil59                        7:7.1.1-1+b1
ii  libc6                              2.41-6
ii  libcurl3t64-gnutls                 8.13.0~rc2-2
ii  libegl1                            1.7.0-1+b2
ii  libfontconfig1                     2.15.0-2.2
ii  libfreetype6                       2.13.3+dfsg-1
ii  libgcc-s1                          14.2.0-19
ii  libglx0                            1.7.0-1+b2
ii  libjansson4                        2.14-2+b3
ii  libluajit-5.1-2                    2.1.0+openresty20250117-2
ii  libmbedcrypto16                    3.6.2-3
ii  libmbedtls21                       3.6.2-3
ii  libmbedx509-7                      3.6.2-3
ii  libobs0t64                         30.2.3+dfsg-2+b5
ii  libopengl0                         1.7.0-1+b2
ii  libpci3                            1:3.13.0-2
ii  libpulse0                          17.0+dfsg1-2+b1
ii  libpython3.13                      3.13.2-2
ii  libqrcodegencpp1                   1.8.0-1.2+b2
ii  libqt6core6t64                     6.8.2+dfsg-5+b1
ii  libqt6dbus6                        6.8.2+dfsg-5+b1
ii  libqt6gui6                         6.8.2+dfsg-5+b1
ii  libqt6network6                     6.8.2+dfsg-5+b1
ii  libqt6svg6                         6.8.2-3
ii  libqt6widgets6                     6.8.2+dfsg-5+b1
ii  libqt6xml6                         6.8.2+dfsg-5+b1
ii  librist4                           0.2.11+dfsg-1
ii  libspeexdsp1                       1.2.1-3
ii  libsrt1.5-openssl                  1.5.4-1
ii  libstdc++6                         14.2.0-19
ii  libswscale8                        7:7.1.1-1+b1
ii  libudev1                           257.4-3
ii  libv4l-0t64                        1.28.1-1
ii  libva-drm2                         2.22.0-3
ii  libva2                             2.22.0-3
ii  libx11-6                           2:1.8.12-1
ii  libx264-164                        2:0.164.3108+git31e19f9-2+b1
ii  libxcb-composite0                  1.17.0-2+b1
ii  libxcb-randr0                      1.17.0-2+b1
ii  libxcb-shm0                        1.17.0-2+b1
ii  libxcb-xfixes0                     1.17.0-2+b1
ii  libxcb-xinerama0                   1.17.0-2+b1
ii  libxcb1                            1.17.0-2+b1
ii  libxkbcommon0                      1.7.0-2
ii  python3                            3.13.2-2
ii  python3.13                         3.13.2-2
ii  qt6-image-formats-plugins          6.8.2-3
ii  qt6-wayland                        6.8.2-3

Versions of packages obs-studio recommends:
ii  obs-plugins  30.2.3+dfsg-2+b5

Versions of packages obs-studio suggests:
ii  pkexec             126-2
ii  v4l2loopback-dkms  0.14.0-1

-- no debconf information

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