Binary package “phonon4qt5-dbg” in ubuntu xenial

multimedia framework from KDE using Qt 5 - debugging symbols

 Phonon is the Qt 5 multimedia API, which provides a task-oriented abstraction
 layer for capturing, mixing, processing, and playing audio and video content.
 .
 This package contains debugging symbols for the Phonon library and its main
 back-ends. Install it if you want to report a crash or debug a problem with
 Phonon or its back-ends.