Binary package “phonon4qt5-backend-null” in ubuntu focal

multimedia framework from KDE using Qt 5 - null back-end (no real back-end)

 Phonon is a Qt 5 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.