QtMultimedia Issue

[fortyff]

Hi Everyone,
I am using version of Qt5 and Ubuntu 16.04. I searched on the Internet and this website and I've got nothing.
The error that I've got when I build the program is :

cannot find -lQtMultimedia
collect2: error: ld returned 1 exit status

I've already install these libraries :

• libqt5multimedia5 - Qt 5 Multimedia module
• libqt5multimedia5-plugins - Qt 5 Multimedia module plugins
• libqt5multimediaquick-p5 - Qt 5 Multimedia Quick module
• libqt5multimediawidgets5 - Qt 5 Multimedia Widgets module
• qtmultimedia5-dbg - Qt 5 Multimedia library debugging symbols
• qtmultimedia5-dev - APIs for multimedia functionality - development files
• qtmultimedia5-examples - Examples for Qt 5 Multimedia module
• qtdeclarative5-qtmultimedia-plugin

The errors still exist. I don't know how to solve that.
If there is any suggestion, I'll be glad to know.

Thanks in advance..

[Jan-Willem]

Did you add multimedia and multimediawidgets tot your pro-file?

[fortyff]

@Jan-Willem said:

Did you add multimedia and multimediawidgets tot your pro-file?

Do you mean ?

QT += multimedia
QT += multimediawidgets
LIBS += -lQtMultiMedia -lQtMultiMediaWidgets

These are in my current pro-file.

[VRonin]

just remove the line LIBS += -lQtMultiMedia -lQtMultiMediaWidgets

the problems comes from the fact that they are called Qt5Multimedia and Qt5MultimediaWidgets but it does not matter as QT += multimedia multimediawidgets will take care of the linking without adding anything else

[fortyff]

@VRonin said:

just remove the line LIBS += -lQtMultiMedia -lQtMultiMediaWidgets

the problems comes from the fact that thet are called Qt5Multimedia and Qt5MultimediaWidgets but it does not matter as QT += multimedia multimediawidgets will take care of the linking without adding anything else

I've just removed that line, but the error still exist.

[VRonin]

make sure you rerun qmake. even better, clear the project and rebuild

[Jan-Willem]

You mean it still can not find QtMultimedia?
Does QtCreator autocomplete on QtMultimedia-stuff?

Perhaps you could run qmake and rebuild your project?

[fortyff]

I have just solved the problem. I did as you said. The things were going fine, but the error was still exist. Therefore, I tried to find the source of the problem. In makefiles of the program what I am dealing with, the library links are referred as

libQtMultimedia

However, in my library location there is no library exactly the same name. There is :

libQt5Multimedia

So, I redefined it in makefile, and the problem is solved.

Thanks for your helps..