Get the value associated with the @query_key key. Will return %NULL if the
key has no value or if the key does not exist in the URI query table. Because
%NULL is returned for both missing keys and keys with no value, you should
use gst_uri_query_has_key() to determine if a key is present in the URI
query.
Get the value associated with the @query_key key. Will return %NULL if the key has no value or if the key does not exist in the URI query table. Because %NULL is returned for both missing keys and keys with no value, you should use gst_uri_query_has_key() to determine if a key is present in the URI query.