$ brew install ffmpeg --with-faac
$ /usr/local/Cellar/ffmpeg/2.6.2/bin/ffmpeg -i input.mov -vcodec copy -an output.mov
How to remove sound from mov on Mac OS : ffmpeg
$ brew install ffmpeg --with-faac
$ /usr/local/Cellar/ffmpeg/2.6.2/bin/ffmpeg -i input.mov -vcodec copy -an output.mov