The Recording Compositions API is now available in Public Beta, enabling developers to transcode, combine and mix Group Room Video Recordings through an API. The API solves the problem of mixing individual recorded tracks, which requires synchronization, transcoding, scaling and layout operations. To create a composition, developers need to specify sources, video layout, resolution and other parameters, and the media engine applies processing and transformation operations to generate a new composed media file. The API is designed with simplicity and predictability in mind, with pricing based on composition duration and storage costs per GB and month. Future updates will include console controls for automating composition creation, searching and visualizing compositions, as well as support for further media formats.