Autopluggers like playbin and decodebin use the element caps plus static ranks
to create piplines.
The rank of an elemnt right now refers to the quality/maturity of the element.
-Elements with higher rank should be functionaly more complete. If we have
+Elements with higher rank should be functionally more complete. If we have
multiple elements that are feature complete there is a draw.
There are more decission criteria thinkable: