a GList of GstElementFactory to filter. [transfer none][element-type Gst.ElementFactory]
a GstCaps
a GstPadDirection to filter on
whether to filter on caps subsets or not.
a GList of GstElementFactory elements that match the given requisits. Use gst_plugin_feature_list_free after usage. [transfer full][element-type Gst.ElementFactory]
Filter out all the elementfactories in list that can handle caps in the given direction. If subsetonly is TRUE, then only the elements whose pads templates are a complete superset of caps will be returned. Else any element whose pad templates caps can intersect with caps will be returned.