Can't Hear the sound when using QMediaPlayer

Project try

Hey , first of all I'm sorry for asking this even though there're solution out there , but I can't understand the solution , I built Qt statically like months ago and when I tried to use QMediaPlayer I can't hear any sound , it gives me this note:

@defaultServiceProvider::requestService(): no service found for - "org.qt-project.qt.mediaplayer" @

@
bool MainWindow::PlaySong(const QString& filePath)
{
if(filePath.isEmpty())
return false;

qDebug()<<"path to song is "<<filePath;
QMediaPlayer* player = new QMediaPlayer;
player->setMedia(QUrl("mpthreetest.mp3"));

player->play();
return true;

}
@

the file path wasn't working so I copied the same exact mp3 file to the project folder to check but still it isn't working.

I'm using Windows 8 64bit.

if the only solution is to build the whole library again , please direct me to audio libraries that can play any sound extension.

Project try

Well I downloaded the last version of Qt but still the same problem.

SGaist

Hi,

Are you sure you built the QtMultimedia backend properly and that you are linking to it ?

Also note that you have there a memory leak there since every time your call PlaySong you create a new QMediaPlayer.

Project try

[quote author="SGaist" date="1415318159"]Hi,

Are you sure you built the QtMultimedia backend properly and that you are linking to it ?

Also note that you have there a memory leak there since every time your call PlaySong you create a new QMediaPlayer.

[/quote]

Hey, when I built Qt statically about 5-8 months ago I followed a post and it worked , but I think there was a library that I had to build myself I think it's QNetwork ? i'm not really sure , but as I said I downloaded the last version which is 5.3.2 and it still doesn't work.

about the linking part I'm not sure if I understand you , but I did this in the pro file:

@QT += multimedia@

About the memory leak I'm not really planning on doing this but I just had to test it "I'll be using the pointer to mediaplayer as a memeber variable in my class so I can link it to signals and slots" , also I thought when you give a parent to a class that uses subclasses of QObject then it would automatically take care of the deletion process for you.

SGaist

You don't give any parent to player so nothing will be done. If you set a parent, indeed it will be deleted at the end of its parent life. However it generally means at the end of the application.

I have some memories about the need for the QtMultimedia plugins to be dynamic however, I don't' know if it still applies.

Project try

[quote author="SGaist" date="1415406195"]You don't give any parent to player so nothing will be done. If you set a parent, indeed it will be deleted at the end of its parent life. However it generally means at the end of the application.

I have some memories about the need for the QtMultimedia plugins to be dynamic however, I don't' know if it still applies.[/quote]

Well , I downloaded The newest version of Qt but it still doesn't work , is there an alternative ?

My idea is simple , I'll make a simple playlist that plays audio only and when he clicks on a song it automatically plays like any audio player out there , where there's a progress bar , pausing , stopping , starting and repeating among other simple things like speeding the audio and stuff.

SGaist

Did you check that you don't have any error with QMediaPlayer ?

Project try

[quote author="SGaist" date="1415487310"]Did you check that you don't have any error with QMediaPlayer ?[/quote]

How can I check that ? All I did is write that code in my post and when I call that function it gives me the same thing in the application output it says no service found for mediaplayer.

SGaist

Can you try with a dynamic build of Qt ?

Project try

[quote author="SGaist" date="1415575656"]Can you try with a dynamic build of Qt ?[/quote]

Well, isn't the downloadable version of Qt is dynamic ? I downloaded the newest but opened my old project to test it , should I start a new project or what ?

SGaist

Which version you where using wasn't clear.

Anyway, run your application with QT_DEBUG_PLUGINS=1 That should help find the misbehaving part