Video Compositing via 'FFmpeg' // Wraps common 'FFmpeg' https://ffmpeg.org/ filter_complex patterns (overlay, chromakey, concat, scale, vstack) into clean R functions for video compositing, and lowers an 'OpenTimelineIO' https://github.com/AcademySoftwareFoundation/OpenTimelineIO timeline (via the 'rotio' package) to a rendered video.