Wowza doesn’t adjust streams, which would involve encoding, which Wowza doesn’t do. You can use the BWCheck module to detect bandwidth (from server to client):
http://community.wowza.com/t/-/31
You can use the results in a Flash application to choose a lower bitrate version of a video that you have prepared. And you can use BWCheck with player systems like JW Player and Flowplayer. But this requires a lot of preparation on your part: Setting up the BWCheck module, the player, and the media.
Also:
A 46kbs connection can support a modest audio stream. But, as noted above, it’s the server to client bandwidth that matters most to Wowza, which changes from moment to moment and is usually different than what users think they have. The BWCheck example, which includes a Flash app that does the BWCheck repeatedly, will illustrate this.
60MB files size is not relevant. It’s bitrate that matters, which you can calculate an average with this formula:
(File size in kiloBytes * 8) / video duration in seconds = kiloBits
Richard