object doing the typefinding, or null (used for logging)
caps of the media
the list of #GstTypeFindFactory corresponding to caps, or null if no typefinder could be found. Caller should free the returned list with glib.list.List.free and list elements with gst.object.ObjectGst.unref.
Tries to find the best #GstTypeFindFactory associated with caps.
The typefinder that can handle caps will be returned.
Free-function: g_list_free