FFMPEG Buildpack latest build as of July 2017.
FFMPEG_THUMBNAILER_URL='https://github.com/dirkvdb/ffmpegthumbnailer/releases/download/2.2.0/ffmpegthumbnailer-2.2.0.tar.bz2' FFMPEG_URL='http://ffmpeg.org/releases/ffmpeg-3.1.3.tar.bz2' LIBJPEG_URL='http://ijg.org/files/jpegsrc.v9b.tar.gz' LIBPNG_URL='https://downloads.sourceforge.net/sourceforge/libpng/libpng-1.6.30.tar.gz' ZLIB_URL='http://zlib.net/zlib-1.2.11.tar.gz'