clip-js
online video editor built with nextjs, remotion and ffmpeg
...The system uses a WebAssembly port of FFmpeg to perform high-quality rendering, allowing export of videos without relying on server-side processing. It includes interactive controls for trimming, splitting, and arranging media elements with precise timing. The editor supports dynamic adjustments such as opacity, positioning, and layering to fine-tune compositions. It also incorporates keyboard shortcuts and responsive UI elements to improve workflow efficiency. Overall, it demonstrates how full-featured video editing can be achieved entirely within a web application.