After I did a little research on https://bugzilla.gnome.org I solved the problem with installing gstreamer0.10-plugins-ugly and removing gstreamer0.10-ffmpeg.
(See https://bugzilla.gnome.org/show_bug.cgi?id=589793 )
After I did a little research on https:/ /bugzilla. gnome.org I solved the problem with installing gstreamer0. 10-plugins- ugly and removing gstreamer0. 10-ffmpeg.
(See https:/ /bugzilla. gnome.org/ show_bug. cgi?id= 589793 )