Logging Stream Traffic

Does anyone know of a premade product (or actionscript technique) to track traffic to a stream? We would like to know: 1) how many times a stream is initiated, 2) how many times the stream is completely watched and 3) how long (time) the stream is watched

Ultimately we need to have a tracking mechanism to report on pre-roll ad usage, but these same stats would be helpful for general site traffic as well.