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FFmpeg vs GPAC: catalog facts
FFmpeg	GPAC
Free Free and open source. The codebase is mainly LGPL 2.1 with some components under the GPL…	Free Free and open source.
Windows, macOS, Linux, Command line	Windows, macOS, Linux, Command line
Handles practically every container and codec there is Remuxes without re-encoding, so a container change is instant and lossless	MP4Box gives fine control over MP4 muxing and demuxing DASH and HLS packaging with low-latency support
Command line only, with syntax that punishes guessing Argument order matters in ways that are not obvious	Mainly command-line driven, with a steep learning curve Aimed at streaming workflows rather than editing
Downloadable app	Downloadable app
Open source	Open source
License: LGPL-2.1	License not stated
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 21, 2026	Official website Full listing and sources Checked October 1, 2026

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