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..