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Av1an vs Nmkoder: catalog facts
Av1an	Nmkoder
Free Free and open source, developed under the rust-av project on GitHub.	Free Free and open source under the GPL-3.0 licence.
Command line	Windows
Parallel chunked encoding makes use of all CPU cores Supports AV1 and other encoders from one tool	Graphical access to FFmpeg and av1an encoding Batch processing and multi-file muxing modes
Command-line only, with no graphical interface Relies on separately installed encoders and tools	Windows only Development has been quiet since mid-2024
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	License: GPL-3.0
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 2, 2026

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