Convert mov to gif in Mac

Motivation

File extension of screen record in Mac is .mov (By QuickTime)

Can use ffmpeg to convert to gif to reduce file size

Install ffmpeg

brew install ffmpeg

Convert mov to gif

ffmpeg -i AM.mov output.gif

Reference

https://superuser.com/questions/436056/how-can-i-get-ffmpeg-to-convert-a-mov-to-a-gif