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FFmpeg vs Av1an: catalog facts
FFmpeg	Av1an
Free Free and open source. The codebase is mainly LGPL 2.1 with some components under the GPL…	Free Free and open source, developed under the rust-av project on GitHub.
Windows, macOS, Linux, Command line	Command line
Handles practically every container and codec there is Remuxes without re-encoding, so a container change is instant and lossless	Parallel chunked encoding makes use of all CPU cores Supports AV1 and other encoders from one tool
Command line only, with syntax that punishes guessing Argument order matters in ways that are not obvious	Command-line only, with no graphical interface Relies on separately installed encoders and tools
Downloadable app	Downloadable app
Open source	Open source
License: LGPL-2.1	License: GPL-3.0
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 October 2, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.