gst_base_transform_update_qos 1892 libs/gst/base/gstbasetransform.c       gst_base_transform_update_qos (trans, proportion, diff, timestamp);
gst_base_transform_update_qos  261 libs/gst/base/gstbasetransform.h void		gst_base_transform_update_qos       (GstBaseTransform *trans,