Hello @Bernhard_Schmidt happy to help with the transition. We’ve recently created several articles around this for Engine > CDN but the right article depends on whether or not you need to push the stream to the CDN or have the CDN pull the stream.
If you are pulling the stream, you need to use the HTTP origin option in Streaming Engine. Then in Step 2 within Streaming Cloud when you are creating the stream target to Fastly, configure it as custom origin.
You need this article If pulling the stream, you have to use HTTP Origin in order to cache for sessionless playback requests from Fastly.
Migrate with Wowza Streaming Engine
Stream directly from Wowza Streaming Engine to Wowza CDN on Fastly
The following resources describe how to set up streaming from Wowza Streaming Engine directly to Wowza CDN on Fastly, bypassing transcoding in Wowza Streaming Cloud.
You can choose to create a Fastly stream target for a push-based or pull-based workflow.
Configure using a pull-based workflow:
Configure using a push-based workflow:
MAIN DOCUMENTATION: Migrating from Akamai to Fastly for either Streaming Engine or Streaming Cloud