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FFmpeg vs Avidemux: catalog facts
FFmpeg	Avidemux
Free Free and open source. The codebase is mainly LGPL 2.1 with some components under the GPL…	Free Free and open source under the GPL.
Windows, macOS, Linux, Command line	Windows, macOS, Linux
Handles practically every container and codec there is Remuxes without re-encoding, so a container change is instant and lossless	Copy mode cuts and joins without re-encoding, so trims are instant and lossless Handles AVI, MP4, MPEG, MKV and ASF among many others
Command line only, with syntax that punishes guessing Argument order matters in ways that are not obvious	Not a timeline editor; there is no multi-track editing or compositing The last stable release is from 2022, with newer work only in nightly builds
Downloadable app	Downloadable app
Open source	Open source
License: LGPL-2.1	License: GPL-2.0
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 21, 2026	Official website Full listing and sources Checked September 21, 2026

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