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I can also recommend licecap (https://www.cockos.com/licecap/), which is quite minimalistic but gets the job done

been using LICEcap for a few years, works perfectly.

screentogif is my go-to for windows for anything recording

Why not the built in QuickTime on macOS? It lets you choose a screen section with arbitrary aspect ratio.

Does it offer compression, post-recording resizing and multi-format exports?