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afmpeg

FFmpeg in pure Go with no install, no CGO and no disk: a WASM build of FFmpeg running over a virtualised, in-memory filesystem, so media processing ships as a single binary and stays sandboxed. That virtual FS layer is a big part of the appeal, and the whole thing sits behind one clean Go interface, no dropping to a shell, no wrangling CGO bindings. A native FFmpeg backend is on the way too, for the performance edge cases where you can trade the security posture for speed, and it speaks the very same interface.