You will first create a build server using the Vulcan gem. These are the libraries you will end up installing to get all of this to work. I found there was no documentation to do exactly this, so I hope this is helpful for other people (and will save them the countless hours it took me to finally get it to work) We have no need for it, so we do not support it.Below are the steps I took to install ffmpeg, ffmpegthumbnailer, and heroku to use with carrierwave-video and carrierwave-video-thumbnailer gems on my heroku app. The code itself should build FFmpeg on Cedar-14 but it requires more complicated setup. We use Docker with Heroku-18 build image. We expect to find binary archives with these keys: ffmpeg/$STACK/$FFMPEG_. It defaults to kc-heroku-buildpack-binaries. The AWS S3 bucket can be overridden by setting FFMPEG_S3_BUCKET config var. It defaults to whatever we have seen as the last stable version which is 4.1.1 as of this writing. Heroku stack your app is running on is something you have to configure yourself.ĭesired FFmpeg version cat be set by FFMPEG_VERSION config var.

Building FFmpeg from sources during this phase is something that would be great but it is not implemented. In this phase we download pre-build binaries from AWS S3 for specified FFmpeg version and Heroku stack. We utilize only bin/compile script expected by Heroku Buildpack API. # configuration: -prefix=/app/.ffmpeg -enable-nonfree -enable-gnutlsĪs you can ffmpeg and other FFmpeg binaries are accessible via PATH environment variable. # ffmpeg version 4.1.1 Copyright (c) 2000-2019 the FFmpeg developers # Running ffmpeg -version on ⬢ kc-ffmpeg.

How to use ffmpeg on heroku