a script (set of scripts)? for building a custom made ffmpeg alpine container of your dreams

the distribution package of ffmpeg is pretty bloated for my purposes, as it contains a lot more than i could ever possibly use at once (for understandable reasons like convenience -- i'm not saying it's wrong, it's just not needed in most containers). i made this so that you can hopefully significantly reduce the size of your container while keeping everything you need

• fork this repo so you can store your changes
• enable/disable things you need/don't need in the config folder
• try to build the dockerfile locally
  • if you enabled some things, it will most likely fail due to the fact that you'll need some libraries
  • figure out what package you need to install and add it to your dockerfile. remember that you need to add development headers (package name usually ends in -dev) for the build step, and the regular library (doesn't end in -dev) for the actual final image.
  • you will also most likely need to enable these libraries in ./build.sh, in the "EXTERNAL LIBRARIES" section (simply uncommenting their particular line, or commenting if it's toggled by --disable will do).
• repeat the above until you have a working build, at which point you can commit your changes to your fork and let github actions build and push your image

• set the TMP_DIR variable which will be used for temporary files (e.g. via export TMP_DIR=$(mktemp -d))
• set FFMPEG_VERSION and FFMPEG_SHA256 to whatever version you want to build, and a SHA256 hash of its .tar.xz tarball
• run ./meta/prep.sh