Livestreaming, parallel recording and stream "sectioning" possible?

[potentialcustomer]

Hi everyone,

we're planning to use Wowza as our main streaming server solution for an invitation to tender, but we're wondering whether it's possible to implement a sort of "time shifting" mechanism in Wowza. Basically, we're planning to deliver livestreams and have metadata attached to the stream in realtime. That metadata is going to be stored in a database and will be used in combination with a web frontend to allow the user to search for specific content of a stream.

What we need is:
1.) Live-streaming to a broad audience
2.) Recording of the livestream at the same time
3.) A method to give the user access to specific parts of the stream

We're planning to record the livestream as one file per day. The user will then click a link with prepared parameters indicating the start and end time of the part of the stream the user wishes to view. This "sectioning" happens automatically based on the search function and the metadata from the database. To the user, this should look as though he was viewing a, say, 5-minute-long separate clip. But actually, that fraction of the stream is being taken from that one big stream file.
Now to my questions: is such a thing possible with Wowza? Do you see any sticking points, anything we might want to consider doing instead?

Thank you in advance,
Benjamin