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Bug#1120843: python3-pyqt5.qtmultimedia: function QCameraInfo.availableCameras() finds no cameras.

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  Bug#1120843: python3-pyqt5.qtmultimedia: function QCameraInfo.availableCameras() finds no cameras. Peter Roes <peter@msnp.nl> - 2025-11-17 14:20 +0100

#1270504 — Bug#1120843: python3-pyqt5.qtmultimedia: function QCameraInfo.availableCameras() finds no cameras.

Package: python3-pyqt5.qtmultimedia
Version: 5.15.11+dfsg-2
Severity: important
X-Debbugs-Cc: peter@msnp.nl

Dear Maintainer,

After upgrading from Debian 12 to Debian 13, certain programs (notably qtqr,
which can scan qr codes with webcams) did not find webcams anymore.

Running the program with QT_DEBUG_PLUGINS=1 revealed QFactoryLoader() looking
for a directory that did not exist on my system: /usr/lib/x86_64-linux-
gnu/qt5/plugins/mediaservice

As an educated guess, I installed libqt5multimedia5-plugins. This fixed the
problem.

With kind regards,

Peter Roes


-- System Information:
Debian Release: 13.2
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'stable-security'), (500, 'stable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 6.12.57+deb13-amd64 (SMP w/12 CPU threads; PREEMPT)
Kernel taint flags: TAINT_PROPRIETARY_MODULE, TAINT_WARN, TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE=en_US:en
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages python3-pyqt5.qtmultimedia depends on:
ii  libc6                     2.41-12
ii  libqt5core5t64            5.15.15+dfsg-6
ii  libqt5gui5t64             5.15.15+dfsg-6
ii  libqt5multimedia5         5.15.15-2
ii  libqt5multimediawidgets5  5.15.15-2
ii  libqt5network5t64         5.15.15+dfsg-6
ii  libqt5widgets5t64         5.15.15+dfsg-6
ii  libstdc++6                14.2.0-19
ii  python3                   3.13.5-1
ii  python3-pyqt5             5.15.11+dfsg-2

python3-pyqt5.qtmultimedia recommends no packages.

python3-pyqt5.qtmultimedia suggests no packages.

-- no debconf information

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