App for macOS 10.13+ (source).
For Windows and Debian download the latest version. For macOS with Homebrew the best way is:
You can also get it with
brew install gifski
cargo install gifski if you have Rust installed.
You may need ffmpeg to convert video to PNG frames first (Homebrew installation includes built-in video conversion, but other versions don't). In your favourite command line/terminal, run:
ffmpeg -i video.mp4 frame%04d.png
This command takes a file named "video.mp4" and makes files "frame0001.png", "frame0002.png", "frame0003.png", etc. from it (
%04d makes the frame number). You can usually drag'n'drop files into the terminal window to avoid typing the paths.
and then make the GIF from the frames:
gifski -o file.gif frame*.png
This command makes file "file.gif" from PNG files with names starting with "frame" (
* stands for frame numbers). It's equivalent of
gifski -o file.gif frame0001.png frame0002.png frame0003.png, etc. If you get erros about files not found, try using full paths to gifski(.exe) and the frames.
gifski -h for more options. The conversion might be a bit slow, because it takes a lot of effort to nicely massage these pixels. Also, you should suffer waiting like the poor users who will be downloading these huge files.