[Bug]: Missing dependencies on debian testing/sid (libqt6gui6t64 / libqt6widgets6t64)

[keriszafir]

Is there an existing issue for this?

• I have searched the existing issues and did not find a similar issue

This bug exists on the latest available release of DistroAV and supported environment?

• I have checked this bug still exist on the latest available version of DistroAV
• I have checked that my OS / OBS / NDI versions are supported

OBS Log [URL] - Important!

No response

Issue reported - Current Behavior

On OBS startup, DistroAV 6.0.0 asks for update to 6.1.1 but nothing happens, the old version stays installed.

When trying to install distroav-6.1.1-x86_64-linux-gnu.deb using dpkg, I get missing dependency error for libqt6gui6t64 and libqt6widgets6t64 which are virtual packages in Debian testing/sid as the distribution already removed the t64 suffix for these packages after porting them to 64-bit epoch time.

Worked for distroav=6.0.0 as it depends on packages without the t64 suffix.

Expected Behavior

distroav-6.1.1-x86_64-linux-gnu.deb can use libqt6gui6 and libqt6widgets6 as alternative dependencies

Steps To Reproduce

1. install debian with KDE Plasma, set sources.list to track testing and sid, update and full-upgrade your system
2. install obs-studio
3. install distroav = 6.0.0 from deb package (and any of its dependencies), make sure it works
4. install distroav = 6.1.1 from deb package

Environment

- OS: Debian testing/sid amd64 with KDE Plasma desktop environment
- OBS: 30.2.3+dfsg-3 from Debian repository
- DistroAV: 6.1.1 installed from deb package
- NDI: 6.0.1

Pre-Check for Bug Report

• I am able to reproduce the bug following the steps provided above
• I have confirmed this bug exist on more than one device/computer
• I have tested using a new scene collection to reproduce the issue
• I have tested on a 'clean' OBS installation (aka with no other scripts or plugin installed)

[Trouffman]

Thanks for reporting, if you have any log file of the package installer that would be helpful.

[keriszafir]

raw dpkg output (in Polish as that's my locale):

sudo dpkg -i distroav-6.1.1-x86_64-linux-gnu.deb                                                                                                      [0] 25-06-17 17:24
(Odczytywanie bazy danych ... 550555 plików i katalogów obecnie zainstalowanych.)
Przygotowywanie do rozpakowania pakietu distroav-6.1.1-x86_64-linux-gnu.deb ...
Rozpakowywanie pakietu distroav (6.1.1) nad (6.0.0) ...
dpkg: problemy z zależnościami uniemożliwiają skonfigurowanie pakietu distroav:
distroav zależy od libqt6gui6t64 (>= 6.1.2); jednakże:
 Pakiet libqt6gui6t64 nie jest zainstalowany.
distroav zależy od libqt6widgets6t64 (>= 6.1.2); jednakże:
 Pakiet libqt6widgets6t64 nie jest zainstalowany.

dpkg: błąd przetwarzania pakietu distroav (--install):
problemy z zależnościami - pozostawianie nieskonfigurowanego
Wystąpiły błędy podczas przetwarzania:
distroav

distroav depends on libqt6gui6t64 (>= 6.1.2); but libqt6gui6t64 is not installed
distroav depends on libqt6widgets6t64 (>= 6.1.2); but libqt6widgets6t64 is not installed
left unconfigured

dpkg log:

2025-06-17 17:24:18 upgrade distroav:amd64 6.0.0 6.1.1
2025-06-17 17:24:18 status half-configured distroav:amd64 6.0.0
2025-06-17 17:24:18 status unpacked distroav:amd64 6.0.0
2025-06-17 17:24:18 status half-installed distroav:amd64 6.0.0
2025-06-17 17:24:18 status unpacked distroav:amd64 6.1.1

[Trouffman]

Thank you,
Looking at the dependencies, seems that the OBS-deps are built for Windows & MacOS, we use the following releases :
6.0.0 : https://github.com/obsproject/obs-deps/releases/tag/2024-03-19
6.1.1 : https://github.com/obsproject/obs-deps/releases/tag/2024-09-12

Workaround (temporary)

Can you install it via apt instead of dpkg. ?

apt install ./distroav-6.1.1-x86_64-linux-gnu.deb

if this is still not successful try the following

apt install libqt6widgets6t64 libqt6gui6t64

Please report, which one solved the problem

If nothing works... use the flatpak install !

Finding root cause

Unless you can provide support, none of us in the maintainer team have a debian sid at hand to test. So this is base don available informations.

The missing packages are only available as debport on debian sid : https://packages.debian.org/sid/libqt6widgets6t64
This is because of the ongoing ABI migration for the t64 time_t issue (not related to the plugin)

I digged into the code here and on the obs-studio github and could not find any specific mention of t64 variant being specifically targeted.

But my guess is the following :

• obs-studio plugin ( from obs-plugintemplate, which is the base for distroAV ) build the MacOS & Windows variant from the obs-deps (fixed libqt / prebuilds, etc) based on the obsproject/obs-deps repo.
• The Linux package are built via the actions and do not seems to use the obs-deps.
• The setup script for this is setup_ubuntu which seems to "get the dependencies and install via apt"
• 6.1.1 has been built on Ubuntu (noble) as per : https://github.com/DistroAV/DistroAV/actions/runs/15611855119/job/43974479877
• 6.1.1 does get and install the t64variant of the package (seems to be the new default)

  The following additional packages will be installed:
    [...]
    libqt6core6t64
    libqt6dbus6t64 libqt6gui6t64 libqt6network6t64 libqt6opengl6t64 libqt6qml6
    libqt6qmlmodels6 libqt6quick6 libqt6svg6 libqt6waylandclient6
    libqt6waylandcompositor6 libqt6waylandeglclienthwintegration6
    libqt6waylandeglcompositorhwintegration6 libqt6widgets6t64
    libqt6wlshellintegration6 libqt6xml6t64 [...]

We will not modify the install script to support an unsupported OS as this is a dependency issue that should be fixed with dependencies check/install.

@keriszafir please report if the workaround works, and we will go with that route :)

[keriszafir]

workaround 1:

[keri @ w520 ~ ] % env LANGUAGE="en_US.UTF-8" sudo apt install ./distroav-6.1.1-x86_64-linux-gnu.deb

You might want to run 'apt --fix-broken install' to correct these.
Unsatisfied dependencies:
 distroav : Depends: libqt6gui6t64 (>= 6.1.2) but it is not installable
            Depends: libqt6widgets6t64 (>= 6.1.2) but it is not installable
Error: Unmet dependencies. Try 'apt --fix-broken install' with no packages (or specify a solution).

workaround 2:

[keri @ w520 ~ ] % env LANGUAGE="en_US.UTF-8" sudo apt install libqt6widgets6t64 libqt6gui6t64 

Package libqt6gui6t64 is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source
However the following packages replace it:
  libqt6gui6:i386  libqt6gui6


Package libqt6widgets6t64 is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source
However the following packages replace it:
  libqt6widgets6:i386  libqt6widgets6

package info on dependencies - they're virtual packages

[keri @ w520 ~ ] % env LANGUAGE="en_US.UTF-8" apt show libqt6gui6t64 libqt6widgets6t64

Package: libqt6gui6t64
State: not a real package (virtual)
Package: libqt6widgets6t64
State: not a real package (virtual)
Notice: Can't select candidate version from package libqt6gui6t64 as it has no candidate
Notice: Can't select candidate version from package libqt6widgets6t64 as it has no candidate
Notice: Can't select versions from package 'libqt6gui6t64' as it is purely virtual
Notice: Can't select versions from package 'libqt6widgets6t64' as it is purely virtual
Notice: No packages found

package info on actual libraries which are installed (and which 6.0.0 used as deps):

[keri @ w520 ~ ] % env LANGUAGE="en_US.UTF-8" apt show libqt6gui6 libqt6widgets6

Package: libqt6gui6
Version: 6.8.2+dfsg-6
Priority: optional
Section: libs
Source: qt6-base
Maintainer: Debian Qt/KDE Maintainers <debian-qt-kde@lists.debian.org>
Installed-Size: 11.6 MB
Depends: fontconfig, libc6 (>= 2.38), libdrm2 (>= 2.4.62), libegl1, libfontconfig1 (>= 2.12.6), libfreetype6 (>= 2.11.1), libgcc-s1 (>= 3.0), libglib2.0-0t64 (>= 2.26.0), libglx0, libharfbuzz0b (>= 2.1.1), libice6 (>= 1:1.0.0), libinput10 (>= 1.19.1), libjpeg62-turbo (>= 1.3.1), libmd4c0 (>= 0.2.7), libmtdev1t64 (>= 1.0.8), libopengl0, libpng16-16t64 (>= 1.6.46), libqt6core6t64 (>= 6.8.2), libqt6dbus6 (>= 6.8.2), libsm6 (>= 2:1.2.6), libstdc++6 (>= 12), libts0t64 (>= 1.15), libudev1 (>= 183), libx11-6, libx11-xcb1, libxcb-cursor0 (>= 0.0.99), libxcb-glx0, libxcb-icccm4 (>= 0.4.2), libxcb-image0 (>= 0.2.1), libxcb-keysyms1 (>= 0.4.1), libxcb-randr0 (>= 1.12), libxcb-render-util0, libxcb-render0, libxcb-shape0, libxcb-shm0 (>= 1.10), libxcb-sync1, libxcb-xfixes0, libxcb-xinput0 (>= 1.17.0), libxcb-xkb1, libxcb1 (>= 1.8), libxkbcommon-x11-0 (>= 0.5.0), libxkbcommon0 (>= 0.5.0), qt6-base-private-abi (= 6.8.2), zlib1g (>= 1:1.1.4)
Recommends: qt6-gtk-platformtheme, qt6-qpa-plugins, qt6-svg-plugins, qt6-wayland
Breaks: libqt6gui6t64 (<< 6.8.2+dfsg-6), qt6-qpa-plugins (<< 6.3.1+dfsg-6~)
Replaces: libqt6gui6t64, qt6-qpa-plugins (<< 6.3.1+dfsg-6~)
Homepage: https://www.qt.io/developers/
Tag: role::shared-lib
Download-Size: 3,151 kB
APT-Manual-Installed: no
APT-Sources: http://ftp.icm.edu.pl/pub/Linux/debian testing/main amd64 Packages
Description: Qt 6 GUI module
 Qt is a cross-platform C++ application framework. Qt's primary feature
 is its rich set of widgets that provide standard GUI functionality.
 .
 The QtGui module extends QtCore with GUI functionality.

Package: libqt6widgets6
Version: 6.8.2+dfsg-6
Priority: optional
Section: libs
Source: qt6-base
Maintainer: Debian Qt/KDE Maintainers <debian-qt-kde@lists.debian.org>
Installed-Size: 8,817 kB
Depends: libc6 (>= 2.35), libqt6core6t64 (>= 6.8.2), libqt6gui6 (>= 6.8.2), libstdc++6 (>= 12), qt6-base-private-abi (= 6.8.2)
Breaks: libqt6widgets6t64 (<< 6.8.2+dfsg-6)
Replaces: libqt6widgets6t64
Homepage: https://www.qt.io/developers/
Tag: role::shared-lib
Download-Size: 2,641 kB
APT-Manual-Installed: no
APT-Sources: http://ftp.icm.edu.pl/pub/Linux/debian testing/main amd64 Packages
Description: Qt 6 widgets module
 Qt is a cross-platform C++ application framework. Qt's primary feature
 is its rich set of widgets that provide standard GUI functionality.
 .
 The QtWidgets module extends QtGui with C++ widget functionality.

[Trouffman]

Thanks for the logs.

I checked again the build script, and we build the same way as OBS. Fact that the t64 packages exist in Ubuntu, but not debian (yet) is surprising.

As the plugin is built on Ubuntu (24.04 for now) and the t64 variants are the one provided with the system (at least with apt--upgrade) this cannot be changed.

Have you tried using the Flatpak Install instead?

My skills for debugging & solving this are maxed out, if you have a good idea on how to fix it, let us know.

[RayneYoruka]

Truth be told.. as much as I love Debian they do have quite the outdated packages even in their testing release.
Compiling from source in many situations isn't viable. In these situation I'd recommend as well using Flatpak.

Ubuntu 24.04 has been much more solid for what I've noticed.. without counting the issues the snaps can have.
Even Fedora has been much better in my opinion for DistroAV and OBS releases being up to date.

[keriszafir]

Thanks for the logs.

I checked again the build script, and we build the same way as OBS. Fact that the t64 packages exist in Ubuntu, but not debian (yet) is surprising.

As the plugin is built on Ubuntu (24.04 for now) and the t64 variants are the one provided with the system (at least with apt--upgrade) this cannot be changed.

Have you tried using the Flatpak Install instead?

My skills for debugging & solving this are maxed out, if you have a good idea on how to fix it, let us know.

More like "not anymore" in Debian. The t64 suffix was discarded after the modernized (ie with 64-bit epoch time support) packages were accepted as the main version.

I'll look into Flatpak (though I have no experience with it), or do a local workaround to create re-transitional dummy packages with t64 suffixed names to satisfy the dependencies.

[julienbenjamin]

Truth be told.. as much as I love Debian they do have quite the outdated packages even in their testing release.

This is hardly the issue here.

Ubuntu 24.04 has been much more solid for what I've noticed.. without counting the issues the snaps can have. Even Fedora has been much better in my opinion for DistroAV and OBS releases being up to date.

Debian stable is solid. What you don't account for is exceptional changes such as the package name change which is the root cause here.

For the record, Ubuntu is mostly based off of Debian testing/unstable.