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Celluloid vs Clapper: catalog facts
Celluloid	Clapper
Free Free and open source.	Free Free and open source under GPL and LGPL licences.
Linux	Linux
Uses existing mpv configuration and keybindings unchanged Drag and drop playlist editing	Native GTK4 interface that fits GNOME GStreamer-based playback
Linux only Relies on mpv for playback features, so advanced tuning happens in mpv config files	Aimed at Linux and the GNOME desktop Format support depends on installed GStreamer plugins
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	License: GPL and LGPL
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 23, 2026

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