[Buildroot] Qt Phonon Sound problem

[Muhammed ER]

Hi,
I make a simple example Phonon sound program. But there is error.

---------------
music = Phonon::createPlayer(Phonon::MusicCategory,
Phonon::MediaSource("/test/file.mp3"));
music->play();
----------------

When I clicked, nothing happens, but on console output is:

-----------------------------------------------------------------------------------------------------------------
./phonon_play_wav: can't resolve symbol 'theora_control'
Phonon::GStreamer::Backend: Failed to initialize GStreamer

(<unknown>:635): GStreamer-CRITICAL **: gst_object_ref: assertion `object !=
NULL' failed

(<unknown>:635): GStreamer-CRITICAL **: gst_object_sink: assertion
`GST_IS_OBJECT (object)' failed

(<unknown>:635): GLib-GObject-CRITICAL **: g_object_set: assertion
`G_IS_OBJECT (object)' failed

(<unknown>:635): GStreamer-CRITICAL **: gst_object_ref: assertion `object !=
NULL' failed

(<unknown>:635): GStreamer-CRITICAL **: gst_object_sink: assertion
`GST_IS_OBJECT (object)' failed

(<unknown>:635): GStreamer-CRITICAL **: gst_object_ref: assertion `object !=
NULL' failed

(<unknown>:635): GStreamer-CRITICAL **: gst_object_sink: assertion
`GST_IS_OBJECT (object)' failed

(<unknown>:635): GLib-GObject-CRITICAL **: g_object_set: assertion
`G_IS_OBJECT (object)' failed

(<unknown>:635): GStreamer-CRITICAL **: gst_object_ref: assertion `object !=
NULL' failed

(<unknown>:635): GStreamer-CRITICAL **: gst_object_sink: assertion
`GST_IS_OBJECT (object)' failed

(<unknown>:635): GStreamer-CRITICAL **: gst_element_set_state: assertion
`GST_IS_ELEMENT (element)' failed
WARNING: Phonon::createPath: Cannot connect  Phonon::MediaObject ( no
objectName ) to  Phonon::AudioOutput ( no objectName ).
-----------------------------------------------------------------------------------------------------------------

What is the problem? I can not solve it.

Regards,
Muhammed ER.
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