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Aviator vs Constrict: catalog facts
Aviator	Constrict
Free Free and open source under the GPL 3.0 or later.	Free Free and open source under the GPL-3.0-or-later.
Linux	Linux
Easy AV1 encoding without the command line Uses SVT-AV1 and Opus	Targets an exact output file size automatically Batch compression of multiple videos
Limited to AV1 video and Opus audio output Linux only	Steep size reductions can badly hurt quality or fail Speed limited by local hardware
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0-or-later	License: GPL-3.0-or-later
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 1, 2026

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