Qt: Qt6 Roadmap

[JanNowak94]

As last version of KDE 5 starts to be worked on - smplayer still does not have port that uses Qt6 - we need to fix that. Unless it does want to end as other qt4 projects that didn't ported to qt5 back the day.

some Identified issues:

• not defined:
• • QMenu in actionseditor.cpp
• duplicates:
• • 'class QStringList;' (already included) in:
• • • mplayerprocess.h
• • • mpvprocess.h
• removed functions
• • ahortcutgetter.cpp:
• • • QVBoxLayout::setMargin ShortcutGetter::ShortcutGetter(QWidget *parent) : QDialog(parent) line 270
• • actionseditor.cpp
• • • QVBoxLayout::setMargin ActionsEditor::ActionsEditor(QWidget*, Qt::WindowFlags) line 227
• • • QTextStream::setCodec ActionsEditor::saveActionsTable(const QString&) line 538
• • • QTextStream::setCodec ActionsEditor::loadActionsTable(const QString&) line 579
• use QT_VERSION for include QDesktopWidget in desktopinfo.cpp
• remove RegExp from:
• • paths.cpp:
• • • Paths::doc
• • helper.cpp:
• • • Helper::qtVersion
• • • Helper::searchForConsecutiveFiles
• • • Helper::directoryContainsDVD
• • colorutils.cpp:
• • • ColorUtils::AARRGGBBToColor
• • actionseditor.cpp:
• • • ActionsEditor::loadActionsTable(const QString &)
• ...

Required for MPV_AUDIO_DEVICES

• Remove RegExp from:
• • deviceinfo.cpp:
• • • DeviceList DeviceInfo::mpvAudioDevices(const QString &, const QString &)
• ...

Required for USE_XV_ADAPTORS

• remove RegExp from:
• • deviceinfo.cpp:
• • • DeviceInfo::xvAdaptors
• ...

Required for USE_PULSEAUDIO_DEVICES

• remove RegExp from:
• • deviceinfo.cpp:
• • • DeviceInfo::paDevices
• ...

Required for COLOR_OUTPUT_SUPPORT:

• Remove RegExp feom:
• • colorutils.cpp:
• • • ColorUtils::stripColorsTags
• ...

Identified compatibility issues (need qt5compat - should be ported but not essential now)

• use of QTextCodec is in qt5compat - note that setCodec is not a function even with qt5compat.
• ...

[maverick74]

Nothing new on this front?

[n3thshan]

hi is this updated or abandoned?

[NikitaBeloglazov]

Bump
Any progress?:(

[smplayer-dev]

No.

[Raza-0007]

Hello Ricardo,

Qt 5 support ended on May 26 2025. Do you have any plans to upgrade smplayer to Qt 6?

I do not know how hard it will be or how much work will be required, but please consider upgrading sooner rather than later because as time goes on, smplayer complied on Qt 5 will start becoming a security risk, especially because smplayer can access internet to stream videos.

Thanks in advance,

[smplayer-dev]

Yes, don't worry, it will be done. It’s just a bit tedious and time-consuming.

[a17r]

Qt5 is now declared deprecated in Gentoo

The final release happened on 2025-05-19, which means a) we will not get it until 2026-06-19, b) any bugs discovered since last May will not be fixed and c) no bugs since 2020-12-08 that haven't also been affecting Qt6 were fixed at all.

[Raza-0007]

A user @Sportacandy has submitted a pull request for a patch that allows smplayer to be build with Qt6. He says it is working fine. I hope @smplayer-dev can find some free time to review this patch and if everything is fine, merge it in the repo and provide us a with a Qt6 version of smplayer alongside the Qt5 ones.

[smplayer-dev]

I created a branch with the Qt6 code:
https://github.com/smplayer-dev/smplayer/tree/qt6

[Raza-0007]

That is great! When you get a chance can you please build a Qt 6 based portable Windows version for testing?

[smplayer-dev]

https://github.com/smplayer-dev/smplayer/actions/runs/17513441959/artifacts/3943587493

[Raza-0007]

Thank you. It is working great! I have updated the included mpv to version 0.40 (Aug 18 2025 release), and so far so good. I am going to test it for the next few days, and if I encounter an issue, I will report back.

And thank you for building with the Qt 6.8 branch!