Run the following from the heroku command line:
heroku buildpacks:add --index 1 https://github.com/srobbin/heroku-buildpack-ffmpeg.git
Note: This buildpack should be added before the main language buildpack (by using --index 1),
since the application process types are calculated from the last buildpack in the list if no
Procfile is specified.
This repo is forked from https://github.com/jonathanong/heroku-buildpack-ffmpeg-latest, and changed so that it uses a fixed version of FFmpeg. New, compiled versions of FFmpeg can be found at https://johnvansickle.com/ffmpeg/.