Can the Wowza Server 2 output a simple mpeg-ts multicast stream from files? For example can it send out a upd://234.252.0.1:5000 stream?
Yes it can. Look at the following module as a starting point.
https://www.wowza.com/docs/how-to-get-rtppusher-addon-multicast-and-unicast-streams-to-udp-and-rtsp
If you are looking to build your own module then this is the main code bits that you will need.
https://www.wowza.com/docs/how-to-push-a-native-rtp-or-mpeg-ts-stream-using-rtputils-api
And here is another package in this category:
https://www.wowza.com/docs/how-to-push-streams-to-cdns-and-other-services-push-publishing
Richard