watch_desktop_bash.sh

#!/bin/bash

function watch_desktop() {
    fswatch -e ".*" -i ".mov" ~/Desktop | while read filePath; do
        if [ -f "${filePath}" ]; then
            if [ -f "${filePath/.mov/.gif}" ]; then
                echo 'exists.'
            else 
                echo 'not exists.'
                ffmpeg -i "$filePath" -r 30 -vf scale=680:-1 "${filePath/mov/gif}"
                osascript -e "display notification \"${filePath/mov/gif}\" with title \"Conversion to gif completed.\" sound name \"default\""
            fi
        fi
    done
}

watch_desktop