watch_desktop_fish.sh

#!/opt/homebrew/bin/fish

function watch_desktop
    fswatch -e ".*" -i ".mov" ~/Desktop | while read filePath;
        set replacedFilePath (string replace .mov .gif $filePath)
        if test -e $filePath
            if test -e $replacedFilePath
                echo 'exists.'
            else 
                echo 'not exists.'
                ffmpeg -i "$filePath" -r 30 -vf scale=680:-1 "$replacedFilePath"
                osascript -e "display notification \"$replacedFilePath\" with title \"Conversion to gif completed.\" sound name \"default\""
            end
        end
    end
end

watch_desktop