Binary package “libphonon4qt5-4” in ubuntu bionic

multimedia framework from KDE using Qt 5 - core library

 Phonon is a Qt 5 multimedia API, which provides a task-oriented abstraction
 layer for capturing, mixing, processing, and playing audio and video content.
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 This package contains the core library of the Phonon cross-platform multimedia
 framework from KDE. It is required to run applications that use Phonon.