QMediaPlayer Fails with linker errors [SOLVED]

ion_knight

Below is my code for a very basic player however I am getting a ton of linker errors. Which i have no idea how to solve.

main.cpp
@
#include <QDebug>
#include <QApplication>
#include <QMediaPlayer>
//#include <QVideoWidget>
#include <QtMultimediaWidgets/QVideoWidget>
#include <QVBoxLayout>
#include <QFile>

int main(int argc, char** argv)
{
QApplication app(argc, argv);

QWidget *widget = new QWidget;
widget->resize(400, 300);

QVBoxLayout *layout = new QVBoxLayout;
QMediaPlayer* player = new QMediaPlayer;
QVideoWidget* vw = new QVideoWidget;

layout->addWidget(vw);
widget->setLayout(layout);

player->setVideoOutput(vw);
QFile file&#40;"big_buck_bunny_480p_surround-fix.avi"&#41;;
if(!file.open(QIODevice::ReadOnly&#41;)
    qDebug() << "Could not open file";
player->setMedia(QUrl::fromLocalFile&#40;"big_buck_bunny_480p_surround-fix.avi"&#41;&#41;;
player->play();
widget->show();
qDebug() << player->availableMetaData() << player->currentMedia().canonicalUrl();
return app.exec&#40;&#41;;

}
@

RTSP.pro
@#-------------------------------------------------

Project created by QtCreator 2014-07-22T14:42:07

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

QT += core gui multimedia

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

TARGET = RTSP
TEMPLATE = app

SOURCES += main.cpp
mainwindow.cpp

HEADERS += mainwindow.h

FORMS += mainwindow.ui@

Any help on how to proceed from here would be great as pretty lost where to go from here.
Thanks

andreyc

Could you put some of the error messages here.

SGaist

Hi,

You are missing

@QT += multimediawidgets@

In you pro file

ion_knight

Ah ok weird that fixed it, don't suppose you can explain why this worked cause I presumed by using:

#include <QtMultimediaWidgets/QVideoWidget>

I thought i didn't have to include it inside the pro file. Don't suppose you have any good links to explain the .pro file, cause I thought it was just another method of include.

andreyc

"Here":http://qt-project.org/doc/qt-5/qmake-manual.html is some info about .pro and its "variables":http://qt-project.org/doc/qt-5/qmake-variable-reference.html

There is a qmake line in a C++ class doc that specifies what Qt module to add to "QT":http://qt-project.org/doc/qt-5/qmake-variable-reference.html#qt variable to use the class. For example in "QVideoWidget Class":http://qt-project.org/doc/qt-5/qvideowidget.html