VLC 3.x cross-compilation steps in 2020 Q4

vlc_build_steps

I had to build VLC 3.x from src, and the below steps was the only way that I could achieve this in late 2020.
After many hours, I faced the problem that most of the tutorials out there are so outdated that they just cant work nowdays.
I builded it for Windows x64, on a Pop_os 20.04 VM using a builder container.
I don't know if it works with dev or not, and I can't even trust it to work after like half year, but here it is.
Tip: check build.sh manual for options.

BUILD STEPS:
  1.  install docker (https://gist.github.com/danielbene/98d7a5b08fd5c2c18d4883f250e4b6c6)
  2.  cd ~
  3.  mkdir win64
  4.  sudo docker run -v ~/win64:/win64 --name builder -i -t registry.videolan.org:5000/vlc-debian-win64 /bin/bash
  5.  apt-get update && apt-get install python -y
  6.  cd win64
  7.  git clone https://code.videolan.org/videolan/vlc-3.0.git
  8.  cd vlc-3.0 (edit src here if needed)
  9.  ./extras/package/win32/build.sh -a x86_64 (first build takes 1+ hour)
  10. cd win64
  11. make package-win32-zip (creates a portable zip package - very nice)
  
RE-RUN (after reboot or something):
  1.  sudo docker start builder
  2.  sudo docker exec -i -t builder /bin/bash
  3.  ./extras/package/win32/build.sh -a x86_64 && cd win64 && make package-win32-zip && cd .. && echo -----FINISHED-----
      - after the first build, it only compiles changed files, so it takes like 5 minutes
  
  - for stopping the builder container: sudo docker stop builder
  - check if its running: sudo docker ps --all

src: https://forum.videolan.org/viewtopic.php?t=146175