Gets a %NULL-terminated array of protocols this element supports or %NULL if
no protocols are supported. You may not change the contents of the returned
array, as it is still owned by the element factory. Use g_strdupv() to
make a copy of the protocol string array if you need to.
Gets a %NULL-terminated array of protocols this element supports or %NULL if no protocols are supported. You may not change the contents of the returned array, as it is still owned by the element factory. Use g_strdupv() to make a copy of the protocol string array if you need to.
Return: the supported protocols or %NULL