phonon4qt5-backend-null 4:4.7.1-0ubuntu4 (amd64 binary) in ubuntu trusty

 Phonon is the Qt multimedia API, which provides a task-oriented abstraction
 layer for capturing, mixing, processing, and playing audio and video content.
 .
 This package does not provide any real Phonon back-end. It can be used to
 disable Phonon audio/video capabilities. Please note that Phonon behavior
 with this package installed has not been well tested.
 .
 This package is for the version compiled for Qt 5.