How to install submodule Qtmultimedia on Fedora?

nrml

Environment:
OS: Fedora,
Qt: version 5.15.2

Hello, I am struggling to install Qtmultimedia.

I downloaded Qt binary from Open Source Qt Use and installed version 5.15.2 as Getting Started with Qt .

After I coded something which uses Qtmultimedia, Qt creator said:
Unknown module(s) in QT: multimedia

I found this topic, Qt5 (How to install an addon/ module like Qt Location for instance, but I could not install Qtmultimedia.

What I did 1:

$ git clone git://code.qt.io/qt/qt5.git
$ cd qt5/qtmultimedia
$ 'pathToQt/5.15.2/gcc_64/bin/qmake' 
$ make
$make install

This, however, did not help. The error message came again.

What I did 2:

$ git clone git://code.qt.io/qt/qt5.git
$ cd qt5/
$ ./init-repository --module-subset=qtbase,qtdeclarative,qtmultimedia
$ cd ..
$ mkdir qt5_build
$ ./configure -developer-build -opensource -nomake examples -nomake tests
$ make -j$(nproc)

Unfortunately, this brought errors which related to gcc version, even though mine is latest gcc.

So what can I do to install Qtmultimedia?

Thank you for your time.

SGaist

Hi and welcome to devnet,

Some maybe silly questions:

Did you check that your Kit is indeed using the pre-built binaries ?
Did you check the content of the lib folder in your Qt installation ?
Do you have the same issue if you build your application from the command line ?

nrml

Thank you for your reply.

Did you check that your Kit is indeed using the pre-built binaries ?

I am a newbie of Qt Creator, so I have no idea how to check my kit is using the pre-build binaries...

Did you check the content of the lib folder in your Qt installation ?

The lib folder does not exist under my Qt directory but there are some directories named lib under /5.15.2. Such as /android, /gcc_64, /wasm_32. Others are under qt5/gnuwin32, qt5/qtbase, qt5/qtmultimedia. And last, under Tools/QtCreator.

-Qt/ 
 |--/ 5.15.2
    |-/android
    |-/gcc_64
    |-/wasm_32

Do you have the same issue if you build your application from the command line ?

Not same issue.
After qmake and make, an error said:

mainwindow.h:4:10: fatal error: QMainWindow: No such file or directory
    4 | #include <QMainWindow>
      |          ^~~~~~~~~~~~~
compilation terminated.

SGaist

For verifying the kits go in the Qt Creator settings.

Since you are using your desktop Qt build you should check the content that is in gcc_64.

nrml

@SGaist
I checked Qt creator's setting.
Kits:

Desktop Qt 5.15.2 GCC 64bit

Qt Versions:

Qt 5.15.2GCC 64bit(/Qt/5.15.2/gcc_64/bin/qmake)

Kits' compilers are
C:

GCC (/usr/bin)
GCC (/usr/lib64/ccache)
list itemGCC (/Qt/Tools/QtCreator/libexec/qtcreator/clang/bin)

C++:

GCC (/usr/bin)
GCC (/usr/lib64/ccache)

SGaist

That part looks good.

What about the content of gcc_x64 lib and plugins folders ?

JoeCFD

This is how I installed web engine module. It may be helpful for you.
git clone https://code.qt.io/qt/qtwebengine.git
cd qtwebengine
git checkout 5.15.2 ==>match the Qt version installed
git submodule update --init --recursive
mkdir build
cd build
qmake ../qtwebengine.pro -- -no-build-qtwebengine-core ==>core engine build has been installed, no need to rebuild
make -j4
sudo make install ==>automatically to the installed location of Qt-5.15.2

SGaist

@JoeCFD it's not about QtWebEngine but QtMultimedia.

However, one good point: checkout the branch matching your release. By default it's dev and that one contains Qt 6 code.

JoeCFD

@SGaist I know that. Simply let him know how this is done.

nrml

@SGaist

There are so many, about 600, files in the gcc_64 lib. What kind of files should be in the directory?

Plugins folder has these folders:

assetimporters
audio
bearer
canbus
designer
egldeviceintegrations
gamepads
generic
geometryloaders
geoservices
iconengines
imageformats
mediaservice
platforminputcontexts
platforms
platformthemes
playlistformats
position
printsupport
qmltooling
renderers
renderplugins
sceneparsers
sensorgestures
sensors
sqldrivers
texttospeech
virtualkeyboard
wayland-decoration-client
wayland-graphics-integration-client
wayland-graphics-integration-server
wayland-shell-integration
webview
xcbglintegrations

nrml

@JoeCFD

Thank you for your advice. I tried $ git clone git://code.qt.io/qt/qt5.git and $git checkout and so forth.
At the point at make -j4 errors came, which said

qt5/qtmultimedia/src/multimedia/qmediacontrol.cpp:136:10: fatal error: moc_qmediacontrol.cpp: No such file or directory
  136 | #include "moc_qmediacontrol.cpp"

So I am doing $ https://code.qt.io/cgit/qt/qtmultimedia.git.

SGaist

The idea is that you look for the multimedia library and the plugins. The former should be something like libQt5Multimedia.so and you should have a subfolder named multimedia in the plugins folder.

Note that if you do not have the GStreamer development libraries installed, you won't have much in the multimedia part.

Did you do that from a clean state ?

nrml

@SGaist

Now Qt folder has multimedia and the install done:

$git clone https://code.qt.io/cgit/qt/qtmultimedia.git
$cd qtmultimedia/
$git checkout 5.15.2
$git submodule update --init --recursive
$cd ../qt_build
$qmake ../qtmultimedia/qtmultimedia.pro --
$make -j4
$make install

No error happened but still error: Qtmultimedia/QMediaPlayer: No such file or directory occured.

Note that if you do not have the GStreamer development libraries installed, you won't have much in the multimedia part.

No, I haven't installed GStreamer development yet...

nrml

@SGaist

Did you do that from a clean state ?

No, the Qt folder was not cleaned. Should I re install Qt creator and clone https://code.qt.io/cgit/qt/qtmultimedia.git?

JoeCFD

After installation, you will be able to find this.
5.15.2/gcc_64/include/QtMultimedia
In the .pro file, add multimedia
QT += core gui widgets xml multimedia

nrml

@JoeCFD

Hello,

After installation, you will be able to find this.
5.15.2/gcc_64/include/QtMultimedia

Yes, I can find it.

I uninstalled Qt creator and reinstalled it. Then I did:

$git clone https://code.qt.io/cgit/qt/qtmultimedia.git
$cd qtmultimedia/
$git checkout 5.15.2
$git submodule update --init --recursive
$cd ../qt_build
$qmake ../qtmultimedia/qtmultimedia.pro --
$make -j4
$make install

No error has come. I wrote

QT += core gui widgets xml multimedia

in .pro file and #include <Qtmultimedia/QMediaPlayer> into mainwindow.h file.
But IDE says "Qtmultimedia/QMediaPlayer not found" and "You need to set an executable in the custom run configuration".

What am I missing?

SGaist

It's QtMultimedia.

However, the use of the module prefix recommandation has been dropped since Qt 5.0 if not before.

JoeCFD

This post is deleted!

nrml

@SGaist
Hello,

I changed Qtmultimedia to QtMultimedia but it cannot find the file...

JoeCFD

@nrml said in How to install submodule Qtmultimedia on Fedora?:

QtMultimedia

type:
locate QtMultimedia

to show what you see
I have:
/opt/thirdParties/Qt/5.15.2/gcc_64/include/QtMultimedia/5.15.2/QtMultimedia/