qml error

Linking to https://www.kubuntuforums.net/showthread.php?67703-Kubuntu-video-wallpaper

qmlscene main.qml


Cannot connect to server socket err = No such file or directory
Cannot connect to server request channel
jack server is not running or cannot be started
Cannot connect to server socket err = No such file or directory
Cannot connect to server request channel
jack server is not running or cannot be started
Cannot connect to server socket err = No such file or directory
Cannot connect to server request channel
jack server is not running or cannot be started
Cannot connect to server socket err = No such file or directory
Cannot connect to server request channel
jack server is not running or cannot be started
kf5.kiconthemes: "Theme tree: (Breeze)"
Warning: "No decoder available for type 'video/x-xvid, framerate=(fraction)30000/1001, width=(int)1280, height=(int)720, pixel-aspect-ratio=(fraction)1/1'."
Warning: "No decoder available for type 'audio/mpeg, mpegversion=(int)1, mpegaudioversion=(int)1, layer=(int)3, rate=(int)48000, channels=(int)2, parsed=(boolean)true'."
Error: "Your GStreamer installation is missing a plug-in."

Searching with the error messages =>

https://forum.qt.io/topic/43468/solved-qtmultimedia-media-player-example-can-t-play-any-video-on-ubuntu-14-04/2