GstPad* pad = 0;
g_signal_emit_by_name (m_gst_playbin, "get-audio-pad", i, &pad);
GstCaps* caps = gst_pad_get_negotiated_caps(pad);
+ if (!caps)
+ continue;
GstStructure* str = gst_caps_get_structure(caps, 0);
gchar *g_type;
g_type = gst_structure_get_name(str);