Phonon and simple player...

[make]

i want to make a simple console mp3 player. I want my program to take a name of the music file in console as a paramenter argv[]. But i have a problem:

#include <QCoreApplication>
#include <phonon/AudioOutput>
#include <phonon/MediaObject>
 
int main(int argc, char *argv[])
{
   QCoreApplication app(argc, argv);
 
   Phonon::MediaObject obj;
   Phonon::AudioOutput out;
 
   obj.setCurrentSource(Phonon::MediaSource(argv[1])); //!!!!!!!!!!!!!!
   Phonon::createPath(&obj, &out);
   obj.play();
 
   return app.exec();
}

#include <QCoreApplication>
#include <phonon/AudioOutput>
#include <phonon/MediaObject>

int main(int argc, char *argv[])
{
   QCoreApplication app(argc, argv);
   
   Phonon::MediaObject obj;
   Phonon::AudioOutput out;

   obj.setCurrentSource(Phonon::MediaSource(argv[1])); //!!!!!!!!!!!!!!
   Phonon::createPath(&obj, &out);
   obj.play();
   
   return app.exec();
}

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the problem is here

obj.setCurrentSource(Phonon::MediaSource(argv[1])); //!!!!!!!!!!!!!!

obj.setCurrentSource(Phonon::MediaSource(argv[1])); //!!!!!!!!!!!!!!

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i think it is because MediaSource takes CONST QSTRING & parameter
but i do not know what to do! help me please!