Cannot find -lQtMultimedia

Naouali

Hi guys
I m trying to record my voice using Qt , but when i run the program i get this error: cannot find -lQtMultimedia .
How can i solve this issue.

Thanks in advance

vsorokin

What do operation system you use? Version of Qt? And, please, show your .pro file.

Naouali

Qt version :4.7.1 on linux system (ubuntu 10.10)
this is the .pro file
@#-------------------------------------------------

Project created by QtCreator 2011-04-20T10:11:14

#-------------------------------------------------

QT += core

QT -= gui
QT +=multimedia

TARGET = audiotest
CONFIG += console
CONFIG -= app_bundle

TEMPLATE = app
target.path=/usr/local/bin
INSTALLS=target

INCLUDEPATH +=/home/aladin/QtSDK/Desktop/Qt/473/gcc/include/QtMultimedia/
INCLUDEPATH +=/home/aladin/QtSDK/Desktop/Qt/473/gcc/include/
LIBS +=/home/aladin/QtSDK/QtCreator/lib/qtcreator/libQtMultimedia.so

SOURCES += main.cpp
audio.cpp

HEADERS +=
audio.h@

i added this lines :
1-QT +=multimedia
2-INCLUDEPATH +=/home/aladin/QtSDK/Desktop/Qt/473/gcc/include/QtMultimedia/
3-INCLUDEPATH +=/home/aladin/QtSDK/Desktop/Qt/473/gcc/include/
4-LIBS +=/home/aladin/QtSDK/QtCreator/lib/qtcreator/libQtMultimedia.so

after i commented line (1) and add .4 for the line (4) but this time i get a new error :
/home/aladin/Projects/Qt/audiotest-build-desktop/audiotest: error while loading shared libraries: libQtMultimedia.so.4: cannot open shared object file: No such file or directory

vsorokin

bq. INCLUDEPATH +=/home/aladin/QtSDK/Desktop/Qt/473/gcc/include/QtMultimedia/
INCLUDEPATH +=/home/aladin/QtSDK/Desktop/Qt/473/gcc/include/
LIBS +=/home/aladin/QtSDK/QtCreator/lib/qtcreator/libQtMultimedia.so

Not needed lines.

Naouali

without line 2 and 3 i m not even to compile the program , and the compiler didn't recognize QAudioInput and QAudioFormat

Smar

Ubuntu doesn’t have qt-multimedia anymore.

vsorokin

Ok remove only this line:
LIBS +=/home/aladin/QtSDK/QtCreator/lib/qtcreator/libQtMultimedia.so

Naouali

[quote author="Smar" date="1303308632"]Ubuntu doesn’t have qt-multimedia anymore.[/quote]

so what should i do ? is there a solution to install it in ubuntu 10.10 ?

Smar

I have no idea why Ubuntu guys did that, but you can use qt-mobility’s qt-multimedia(it is the real multimedia package that will be in Qt 4.8 or so instead of that dummy one that’s in 4.6 and 4.7).

Naouali

I installed the qt-mobility and still get the same error or is there new class to use ?

Smar

It is most likely in different package; you need to include it with QT += multimedia... Really, read its documentation, the forum is not substitute to doc. http://doc.qt.nokia.com/qtmobility-1.1/index.html

JohanC

I also got crazy with this error, and the documentation really didn't help.
Combining serveral posts on other forums, and with trial and error, I needed following steps to get the multimedia compiling and running again under Ubuntu.
(In the .pro file)
QT += mobility multimediakit
CONFIG += mobility
MOBILITY = multimedia
... and also remove the QT += multimedia

JohanC

Oops. And also add

INCLUDEPATH += /usr/include/QtMobility
INCLUDEPATH += /usr/include/QtMultimediaKit