Audience
Real-time media developers, streaming platforms, and video product teams that need programmable low-latency compositing for live streams, broadcasts, video conferences, and interactive multimedia workflows
About Smelter
Smelter is a real-time video compositing toolkit for low-latency multimedia composition in live streams and pre-recorded videos. It lets developers combine live feeds, screen recordings, pre-recorded videos, audio, embedded websites, text, graphics, animations, transitions, overlays, and custom shaders into a single video composition or live stream. Smelter is designed for use cases that demand immediate responsiveness, such as live streaming, broadcasting, video conferencing, interactive webinars, meetings, and production studios. It supports multiple sources at the same time without frame drops, allows layouts to change on the fly, and can mix or enrich video content, both live and offline, before saving the result as a file. The toolkit offers a browser-based experience that runs high-performance video processing with WASM and can leverage GPU rendering through WebGL or WebGPU.