Using QtMultimedia Without a QGuiApplication

zbendefy

Hi!
I'm experimenting with the QtMultimedia module. I would like to use it without the other parts of Qt.
The goal is to open a video file and render it into an OpenGL texture.
To do this, I set up a QMediaPlayer and my custom class inheriting from QAbstractVideoSurface.

Some code:

    qmediaplayer->setMedia( QUrl::fromLocalFile( "...somevideo..." ) );
    qmediaplayer->setVolume( 100 );
    qmediaplayer->setVideoOutput( this );  //<-- Crashes here. 'this' is the class inheriting from QAbstractVideoSurface
    qmediaplayer->play();

When I'm opening a video, Qt will assert:

Note that I don't have any QGuiApplications running, I'm using my own event loop etc.
Is there a way to use Qt only for multimedia rendering, or is it a requirement for multimedia to have a QGuiApplication?

sierdzio

If I am not mistaken, you cannot use any QObject-based class without a Q*Application, it won't work.

SGaist

Hi,

It's mandatory as it's that object that creates all the plumbing needed with your platform graphics system.