Force using the phone-xine-backend (Xine backends works but gstreamer is default)

[davidonlaptop]

I'm trying to play a simple wav file using the following code :

Phonon::MediaObject *music =
    Phonon::createPlayer(Phonon::MusicCategory,                              Phonon::MediaSource("/usr/lib/openoffice/basis3.1/share/gallery/sounds/drama.wav"));
music->play();

Phonon::MediaObject *music =
    Phonon::createPlayer(Phonon::MusicCategory,                              Phonon::MediaSource("/usr/lib/openoffice/basis3.1/share/gallery/sounds/drama.wav"));
music->play();

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and i'm getting this error :

(<unknown>:17501): GStreamer-CRITICAL **: gst_element_make_from_uri: assertion `gst_uri_is_valid (uri)' failed

(<unknown>:17501): GStreamer-CRITICAL **: gst_element_make_from_uri: assertion `gst_uri_is_valid (uri)' failed

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I got Amarok working with the xine backend, but NOT with gstreamer backend.

Unfortunatly, even if xine is default for Amarok, it appears that my application is trying to use GStreamer. How do I set the backend in the code?