How to determine Live Stream Bitrate?

Is there a way to determine the actual produced bitrate of a live stream coming from a flash applet? Let say I am streaming from flash at 12fps, 320x240, 90% quality and keyframe every 2 seconds. Can I determine the bitrate of that stream in Wowza side?

Take a look at this example:

https://www.wowza.com/docs/how-to-monitor-bandwidth-of-published-streams-modulelimitpublishedstreambandwidth

IOPerformanceCounter perf = stream.getMediaIOPerformance();
Double bitrate = perf.getMessagesInBytesRate() * 8 * .001;
getLogger().info("Stream '" + stream.getName() + "' BitRate: " + Math.round(Math.floor(bitrate)) + "kbs");

Richard