void gst_tag_setter_add_tag_values (GstTagSetter * setter,
GstTagMergeMode mode,
const gchar * tag,
...) G_GNUC_NULL_TERMINATED;
void gst_tag_setter_add_tag_values (GstTagSetter * setter,
GstTagMergeMode mode,
const gchar * tag,
...) G_GNUC_NULL_TERMINATED;