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FastFlix vs Shutter Encoder: catalog facts
FastFlix	Shutter Encoder
Free Free and open source under the MIT licence.	Free Free and open source under the GPL. Donations are welcomed.
Windows	Windows, macOS, Linux
Supports H.264, HEVC and AV1 Hardware and software encoding options	Professional codecs including ProRes, DNxHR, AV1 and VP9 alongside the usual ones Lossless cut, trim, remux, stream extraction and audio replacement
Focused on encoding, not editing Encoder options can be overwhelming for beginners	The interface exposes a lot at once and takes orientation Java-based, so it is a heavier install than the FFmpeg it drives
Downloadable app	Downloadable app
Open source	Open source
License: MIT	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 September 21, 2026

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