Hi,
Streamtoolbox announces the UI and REST API of Clamp module which uses Wowza Transcoder to put scheduled or ad-hoc overlays on live streams. The features include adding text and images (even animated gif), clock or countdown on top of your video with configurable in and out transitions, scrolling ticker text. It has an easy to use web UI for manual control and a REST API to integrate it with your external system.
The below short video demonstrates some of the key features:
[video=youtube;rwcEiBUfap8]https://www.youtube.com/watch?v=rwcEiBUfap8[/video]