This is a Heroku buildpack for using ffmpeg in your project.
It doesn't do anything else, so to actually compile your app you should use heroku-buildpack-multi to combine it with a real buildpack.
ffmpeg version 4.0 Copyright (c) 2000-2018 the FFmpeg developers built with gcc 7 (Ubuntu 7.3.0-16ubuntu3) configuration: --prefix=/ffmpeg-static/target --pkg-config-flags=--static --pkg-config-flags=--static --extra-cflags='-I/ffmpeg-static/target/include -static' --extra-ldflags='-L/ffmpeg-static/target/lib -static' --extra-libs='-lpthread -lm -lz' --disable-shared --enable-static --extra-ldexeflags=-Bstatic --bindir=/ffmpeg-static/bin --enable-pic --enable-ffplay --enable-fontconfig --enable-frei0r --enable-gpl --enable-version3 --enable-libass --enable-libfribidi --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopus --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libvo-amrwbenc --enable-libvorbis --enable-libxvid --enable-nonfree --enable-openssl libavutil 56. 14.100 / 56. 14.100 libavcodec 58. 18.100 / 58. 18.100 libavformat 58. 12.100 / 58. 12.100 libavdevice 58. 3.100 / 58. 3.100 libavfilter 7. 16.100 / 7. 16.100 libswscale 5. 1.100 / 5. 1.100 libswresample 3. 1.100 / 3. 1.100 libpostproc 55. 1.100 / 55. 1.100 Hyper fast Audio and Video encoder