[Digikam-users] preview of videos does not work

[Karl Mistelberger]

I can play videos with digikam, but preview displays a black screen only 
and the following errors occur:

(digikam:28840): GLib-GObject-CRITICAL **: g_object_set: assertion 
'G_IS_OBJECT (object)' failed

(digikam:28840): GStreamer-CRITICAL **: gst_element_set_state: assertion 
'GST_IS_ELEMENT (element)' failed

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digikam -version
Qt: 4.8.6
KDE: 4.14.9
digiKam: 4.14.0