Public bug reported:

Binary package hint: phonon-backend-gstreamer

I use 8.10 development branches.
phonon-backend-gstreamer version is 4:4.2~svn820171+4.1.83-0ubuntu2

When I compiled sources from a example at 
http://doc.trolltech.com/4.4/phonon-musicplayer.html , It could not play any 
file.
It says:

$./musicplayer
WARNING: bool Phonon::FactoryPrivate::createBackend() phonon backend plugin 
could not be loaded
WARNING: bool Phonon::FactoryPrivate::createBackend() phonon backend plugin 
could not be loaded 
WARNING: bool Phonon::FactoryPrivate::createBackend() phonon backend plugin 
could not be loaded 
WARNING: bool Phonon::FactoryPrivate::createBackend() phonon backend plugin 
could not be loaded 
Phonon::createPath: Cannot connect Phonon::MediaObject(no objectName) to 
Phonon::AudioOutput(no objectName).
WARNING: bool Phonon::FactoryPrivate::createBackend() phonon backend plugin 
could not be loaded

but I've installed phonon-backend-gstreamer.

$aptitude search phonon
i   libphonon-dev                                                  - 
development files for the Phonon multimedia framework                   
i A libphonon4                                                     - Phonon 
multimedia framework for Qt 4                                    
i A phonon                                                         - 
metapackage for Phonon multimedia framework                             
v   phonon-backend                                                 -            
                                                             
i A phonon-backend-gstreamer                                       - Phonon 
GStreamer 0.10.x backend                                         
p   phonon-backend-null                                            - Phonon 
null backend (no real backend)                                   
p   phonon-backend-xine                                            - Phonon 
Xine 1.1.x backend                                               
p   phonon-dbg                                                     - Phonon 
debugging symbols

After some tries, I made a workround:

sudo ln -s /usr/lib/kde4/plugins/phonon_backend
/usr/lib/qt4/plugins/phonon_backend

And the player will work after that.

$./musicplayer
alsasink2: snd_pcm_open(default)
alsasink2: snd_pcm_open(default)
alsasink2: snd_pcm_open(default)
alsasink2: snd_pcm_open(default)
alsasink2: snd_pcm_open(default)
alsasink2: snd_pcm_open(default)
alsasink2: snd_pcm_open(default)

** Affects: phonon (Ubuntu)
     Importance: Undecided
         Status: New

** Summary changed:

- phonon_backend gstreamer did no founded
+ phonon_backend gstreamer could not be loaded

-- 
phonon_backend gstreamer could not be loaded
https://bugs.launchpad.net/bugs/250772
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