Comment 2 for bug 830790

StacktraceTop:
 g_object_set (_object=0x7fbe86717000, first_property_name=0x7fbe6de503be "volume") at /build/buildd/glib2.0-2.29.16/./gobject/gobject.c:1830
 gst_play_sink_set_volume (playsink=0x7fbe8613a030, volume=1.7489030005928951e-06) at gstplaysink.c:787
 gst_play_bin_set_property (object=0x7fbe86136fe0, prop_id=<optimized out>, value=<optimized out>, pspec=<optimized out>) at gstplaybin2.c:1842
 object_set_property (nqueue=0x7fbe85d9fb80, value=0x7fff3557d8c0, pspec=0x7fbe8612fd00, object=0x7fbe86136fe0) at /build/buildd/glib2.0-2.29.16/./gobject/gobject.c:1199
 g_object_set_valist (object=0x7fbe86136fe0, first_property_name=<optimized out>, var_args=0x7fff3557d948) at /build/buildd/glib2.0-2.29.16/./gobject/gobject.c:1727