ubuntu 14.04 install ffmpeg

sudo apt-get --purge remove ffmpeg

sudo apt-get --purge autoremove

sudo apt-get install ppa-purge

sudo ppa-purge ppa:jon-severinsson/ffmpeg

sudo add-apt-repository ppa:mc3man/trusty-media

sudo apt-get update

sudo apt-get dist-upgrade

sudo apt-get install ffmpeg