main.cpp Example File

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 #include <QtCore/QStandardPaths>
 #include <QtCore/QString>
 #include <QtCore/QStringList>
 #include <QtQml/QQmlContext>
 #include <QtQml/QQmlEngine>
 #include <QtGui/QGuiApplication>
 #include <QtQuick/QQuickItem>
 #include <QtQuick/QQuickView>
 #include "trace.h"

 #ifdef PERFORMANCEMONITOR_SUPPORT
 #include "performancemonitordeclarative.h"
 #endif

 static const QString DefaultFileName1 = "";
 static const QString DefaultFileName2 = "";

 int main(int argc, char *argv[])
 {
     QGuiApplication app(argc, argv);

 #ifdef PERFORMANCEMONITOR_SUPPORT
     PerformanceMonitor::qmlRegisterTypes();
 #endif

     QString source1, source2;
     qreal volume = 0.5;
     QStringList args = app.arguments();
 #ifdef PERFORMANCEMONITOR_SUPPORT
     PerformanceMonitor::State performanceMonitorState;
 #endif
     bool sourceIsUrl = false;
     for (int i = 1; i < args.size(); ++i) {
         const QByteArray arg = args.at(i).toUtf8();
         if (arg.startsWith('-')) {
             if ("-volume" == arg) {
                 if (i+1 < args.count())
                     volume = 0.01 * args.at(++i).toInt();
                 else
                     qtTrace() << "Option \"-volume\" takes a value";
             }
 #ifdef PERFORMANCEMONITOR_SUPPORT
             else if (performanceMonitorState.parseArgument(arg)) {
                 // Do nothing
             }
 #endif
             else if ("-url" == arg) {
                 sourceIsUrl = true;
             } else {
                 qtTrace() << "Option" << arg << "ignored";
             }
         } else {
             if (source1.isEmpty())
                 source1 = arg;
             else if (source2.isEmpty())
                 source2 = arg;
             else
                 qtTrace() << "Argument" << arg << "ignored";
         }
     }

     QUrl url1, url2;
     if (sourceIsUrl) {
         url1 = source1;
         url2 = source2;
     } else {
         if (!source1.isEmpty())
             url1 = QUrl::fromLocalFile(source1);
         if (!source2.isEmpty())
             url2 = QUrl::fromLocalFile(source2);
     }

     QQuickView viewer;
     viewer.setSource(QUrl("qrc:///qml/qmlvideo/main.qml"));
     QObject::connect(viewer.engine(), &QQmlEngine::quit, &viewer, &QQuickView::close);

     QQuickItem *rootObject = viewer.rootObject();
     rootObject->setProperty("source1", url1);
     rootObject->setProperty("source2", url2);
     rootObject->setProperty("volume", volume);

 #ifdef PERFORMANCEMONITOR_SUPPORT
     if (performanceMonitorState.valid) {
         rootObject->setProperty("perfMonitorsLogging", performanceMonitorState.logging);
         rootObject->setProperty("perfMonitorsVisible", performanceMonitorState.visible);
     }
     QObject::connect(&viewer, SIGNAL(afterRendering()),
                      rootObject, SLOT(qmlFramePainted()));
 #endif

     const QStringList moviesLocation = QStandardPaths::standardLocations(QStandardPaths::MoviesLocation);
     const QUrl videoPath =
             QUrl::fromLocalFile(moviesLocation.isEmpty() ?
                                     app.applicationDirPath() :
                                     moviesLocation.front());
     viewer.rootContext()->setContextProperty("videoPath", videoPath);

     QMetaObject::invokeMethod(rootObject, "init");

     viewer.setMinimumSize(QSize(640, 360));
     viewer.show();

     return app.exec();
 }