ClipSize uses ffmpeg.wasm only as a fallback to convert videos the browser cannot open (for example HEVC/H.265) into H.264 MP4, entirely on the user's device. - @ffmpeg/ffmpeg 0.12.15 (loader, served from /assets/ffmpeg/) — MIT License https://github.com/ffmpegwasm/ffmpeg.wasm - @ffmpeg/core 0.12.10 (FFmpeg compiled to WebAssembly, loaded from cdn.jsdelivr.net) — GPL-2.0-or-later Includes FFmpeg (https://ffmpeg.org, LGPL/GPL) and x264 (https://www.videolan.org/developers/x264.html, GPL-2.0-or-later). Corresponding source: https://github.com/ffmpegwasm/ffmpeg.wasm/tree/v0.12.10 and https://www.npmjs.com/package/@ffmpeg/core/v/0.12.10