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SoundConverter vs Transition: catalog facts
SoundConverter	Transition
Free Free and open source under the GPL-3.0 licence.	Free Free and open source under the GPL-3.0-or-later licence.
Linux	Linux
Reads anything GStreamer supports Multithreaded batch conversion	Simple video-to-audio conversion Native libadwaita interface
Linux and GNOME focused MP3 output depends on the GStreamer LAME plugin	Linux only Converts to audio only, with no video output
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	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.