We are using wowza to stream live videos from security cameras. Streaming is enabled when required. We are also using transcoder to enable ABR.
In our use case. Most of the time there is a single viewer. So we do not need to transcode incoming video into all supported bit rates. Wowza transcodes incoming video to all supported bit rates.
We need that wowza only transcode into bitrate that user is currently viewing. So that extra computing can be saved.