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I built Minitube 2.5.2 in Ubuntu 14.04 64 bit smoothly but does not play any video.I have installed phonon, phonon-backend-vlc, phonon4qt5-backend-null, libphonon4, libphonon4qt5-4, python-qt4, libphonon4qt5-dev .

When i tried to run minitube command, it shows foloowing error :

$ minitube
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
WARNING: bool Phonon::FactoryPrivate::createBackend() phonon backend plugin could not be loaded
WARNING: 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
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: Phonon::createPath: Cannot connect Phonon::MediaObject ( no objectName ) to Phonon::VideoWidget ( no objectName ) 

What else do I need? How can I solve it? Thanks.

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I have just faced a similar issue, as described in this other question.

After some tries, I have realised that there are separate packages for phonon qt5.

The installation of the following packages solved the issue on my system:

sudo apt install phonon4qt5 phonon4qt5-backend-gstreamer phonon4qt5-backend-vlc

Now, the installation of these packages should probably be recommended from the gwenview package, so this is probably a packaging bug.

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  • Doesn't work with Okular 1.10. Still the same error – Rubi Shnol Jul 10 at 13:31

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