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Asked: 2026-06-14T08:18:20+00:00

I am using ubuntu 11.10 and creating a GUI using QT that uses a

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I am using ubuntu 11.10 and creating a GUI using QT that uses a cmakelist when building.
The problem I am having is i get the “undefined reference to`Phonon::VideoPlayer::VideoPlayer(Phonon::Category, QWidget*)'” error when running make.

I am using QT 4.7.4 and this “Qt PHONON library not found.” also appears when running make.

This is from the cMakeCache

//Path to a library.
QT_PHONONWIDGETS_PLUGIN_RELEASE:FILEPATH=/usr/lib/i386-linux-gnu/qt4/plugins/designer/libphononwidgets.so

//Path to a file.
QT_PHONON_INCLUDE_DIR:PATH=/usr/include/qt4/phonon

//The Qt PHONON library
QT_PHONON_LIBRARY:STRING=

The string always remains empty.

In my header file this is the related code

include “phonon/VideoPlayer”

Phonon::VideoPlayer* player;

and in the cpp

player = new Phonon::VideoPlayer(Phonon::VideoCategory,this);

any help is appreciated.

Thanks

Jacob

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1 Answer

  1. Editorial Team

    I ended up having to copy the four libphonon.so files from QtSDK/QtCreator/lib/qtcreator to usr/lib/i386-linux-gnu to make it work.

    Thanks for help 🙂

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