Install ffmpeg on elastic beanstalk using ebextensions config

A kind person at Amazon helped me out and sent me this config file that works, hopefully some other people will find this useful:

# .ebextensions/packages.config
packages:
  yum:
    ImageMagick: []
    ImageMagick-devel: []
commands:
  01-wget:
    command: "wget -O /tmp/ffmpeg.tar.xz https://johnvansickle.com/ffmpeg/releases/ffmpeg-release-amd64-static.tar.xz"
  02-mkdir:
    command: "if [ ! -d /opt/ffmpeg ] ; then mkdir -p /opt/ffmpeg; fi"
  03-tar:
    command: "tar xvf /tmp/ffmpeg.tar.xz -C /opt/ffmpeg"
  04-ln:
    command: "if [[ ! -f /usr/bin/ffmpeg ]] ; then ln -sf /opt/ffmpeg/ffmpeg-4.2.2-amd64-static/ffmpeg /usr/bin/ffmpeg; fi"
  05-ln:
    command: "if [[ ! -f /usr/bin/ffprobe ]] ; then ln -sf /opt/ffmpeg/ffmpeg-4.2.2-amd64-static/ffprobe /usr/bin/ffprobe; fi"
  06-pecl:
    command: "if [ `pecl list | grep imagick` ] ; then pecl install -f imagick; fi"

Edit:
The above code works for me today 2020-01-03, in Elastic Beanstalk environment Python 3.6 running on 64bit Amazon Linux/2.9.17.
https://johnvansickle.com/ffmpeg/ is linked from the official ffmpeg site.
(The former static build from Gusari does not seem available anymore.)

Warning:
The above will always download the latest release when you deploy. You're also depending on johnvansickle's site being online (to deploy), and his URL not changing. Two alternative approaches would be:

• Download the .tar.xz file to your own CDN, and let your deployment download from your own site. (That way, if John's site has a moment of downtime while you're deploying, you're unaffected. And you won't be surprised by the ffmpeg version changing without you realising.)
• Specify a version number like https://johnvansickle.com/ffmpeg/old-releases/ffmpeg-4.2.2-amd64-static.tar.xz.

You can use a static build from ffmpeg gusari and the sources syntax to automagically download and extract the binaries from a static build tar to /usr/local/bin. Here's an extremely simple example that has worked for me:

sources:
    /usr/local/bin: https://johnvansickle.com/ffmpeg/releases/ffmpeg-release-64bit-static.tar.xz