Description GstQuery functions are used to register a new query types to the gstreamer core. Query types can be used to perform queries on pads and elements. Queries can be created using the gst_query_new_xxx() functions. Query values can be set using gst_query_set_xxx(), and parsed using gst_query_parse_xxx() helpers. The following example shows how to query the duration of a pipeline: Last reviewed on 2006-02-14 (0.10.4)