Awesome. I need to try something other than LICECap. It works as far as it goes, but I too see a lot of lag, bad quality, and often a weird colored line on one of the edges.
Yeah, that's precisely the issue I've had with LICEcap. ScreenToGif is easiest to use and giving best results tool for this. Haven't seen a better gif screen recorder and with added bonus of a simple video editor that allows you to cut the gif to remove extra frames and add things like captions and what not, it really makes it the best tool for it.
Funnily enough I've found about ScreenToGif before I did about LICECap (which I've tried only because I've seen indie devs recommending it), but after using LICECap, I can safely say that it's almost as bad as the insect it has in the name
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Anyway, for the difference in quality between the two, I think ScreenToGif has probably a better encoding and dithering algorithm than LICECap (remember, gifs are only 256 colors, 255 if gif is transparent) and that's why it gets better results. As far as speed goes, my theory is that LICECap tries to capture entire screen, then crop it to necessary area, while ScreenToGif only captures given area in the first place.