StacktraceTop:IA__g_return_if_fail_warning (log_domain=0xb7695a6b "GLib-GObject", IA__g_object_set (_object=0x0, first_property_name=0xb3aef9da "volume") gen_audio_element (play_bin=0x8686808) at gstplaybin.c:1055 setup_sinks (play_base_bin=0x8686808, group=0x8944648) at gstplaybin.c:1522 group_commit (play_base_bin=0x8686808, fatal=<value optimized out>, subtitle=0)
StacktraceTop: IA__g_return_ if_fail_ warning (log_domain= 0xb7695a6b "GLib-GObject", name=0xb3aef9da "volume") 0x8686808) at gstplaybin.c:1055 bin=0x8686808, group=0x8944648) at gstplaybin.c:1522 bin=0x8686808, fatal=<value optimized out>, subtitle=0)
IA__g_object_set (_object=0x0, first_property_
gen_audio_element (play_bin=
setup_sinks (play_base_
group_commit (play_base_