Qt 6

@sierdzio okay. Thank you. I will try. and tell you about result :)

So you did not install Qt6 via the online installer but want to use the one from Ubuntu? Then you also have to install all Qt development packages.

@DeepakVishak
SGaist is right. custom GStreamer pipelines have been dropped in Qt 6 Multimedia, however you can achieve the same using qml6glsink.
Have a look at this example:
https://gitlab.freedesktop.org/gstreamer/gstreamer/-/tree/1.24/subprojects/gst-plugins-good/tests/examples/qt6/qmlsink?ref_type=heads

@Basile_Starynkevitch
I don't know what your command is or how you are presently sending it to QProcess as you do not show these.

You can normally leave the correct quoting to QProcess with an argument list. If, for some reason, you have a string and want to split it into arguments for QProcess you can use QStringList QProcess::splitCommand(QStringView command). Also void QProcess::startCommand(const QString &command, QIODeviceBase::OpenMode mode = ReadWrite) presumably uses that internally.

Note however that you reference https://docs.gtk.org/glib/func.shell_quote.html and that says

Quotes a string so that the shell (/bin/sh) will interpret the quoted string to mean unquoted_string.

Quoting to a shell like /bin/sh can have its own rules. For example, echo '$HOME' and echo "$HOME" behave differently. I don't know how/whether you deal with that. And your GLib shell_quote ignores this.

@sierdzio I replied to someone else by mistake. I noticed it late. It seems similar to what I found. Link: https://stackoverflow.com/questions/70373606/how-to-fix-qt-requires-a-c17-compiler. Thank you for the detailed explanation. In my case, although I don't encounter errors, it seems I need to reconfigure the C++ standard language setting. Thank you

@Ash-V
May I ask: I thought you were a "beginner" at Qt, maybe C++ too (but perhaps not). If you know what you are doing, and have a good usage case, using all the Q_D and d_ptr stuff may be fine. But I, and most people, have never used them, so I just wonder whether you might be over-complicating things.

@Teemo-of-LOL said in Question about Qtftp.:

Does the qtftp functionality also come included in Qt5compat?

No, QFtp is a separate library. As we already told you, you have to port them by yourself if you need it or use QNetworkAccessManager.

May be this is a window11 system problem. now this problem is disappear

@Christian-Ehrlicher Thank you very much!

Just open the 32 bit MSVC command prompt instead the 64bit one.

@JonB
Thank you Jon !

Thanks for giving this additional valuable reply....

@Axel-Spoerl
Thanks Axel !

Thank you very much for your valuable reply !

@JonB said in Issues with the new Qt version using the older compiler:

I don't know what "imported the old Q5.5.0 compiler into Qt6.6.2" means

I expect the latter to be QtCreator.

What I find more interesting is the mention of 5.5
That release was tagged June 2015

@SGaist thanks! It could be a good solution but for a while I don't know how to build external libraries for Android and WebAssembly. I want to be able to make build executables of my applications for Android, Desktop, and WebAssembly. It is why I like Qt very much because it has built-in libraries for parsing XML, JSON, drawing with build-in OpenGL ES, and WebSockets library to make multiplayer game clients for Android, Desktop, and Web. I want to host Node.js game servers with physics engine on free hosting render.com I don't have time to study how to build external libraries for Android and WebAssembly. I only know how to build OpenAL-Soft for Android to play 3D sounds and how to call Web Audio API from WebAssembly.

@tunga had you solved the problem? Just for an experiment try to use jdk-17 and try to make these steps:

set an another path for Android SDK location (create a new folder for Android SDK) try to press Set Up SDK and Open Android SDK download URL buttons:

bdabc7e6-78b4-4a1c-a519-cb69277769e4-image.png

@SGaist
I set QMAKE_RPATHDIR += /usr/local/lib in pro file.
Thanks for your reply and help.
Have a nice day.

@DesiVideoGamer don't know about "like qt5" but do look at the flickDeceleration property.

Edit; I personally prefer it at something like 3000

@devil_coder said in Different behavior in Qt5 and Qt6 with respect to QML files:

Specifically, behavioral difference when clicked was the main reason why I am suspecting z order can be causing the issue.

As you have the code, and we don't. Please confirm that by playing with the z index in that qml.

Please report back your findings.