ffmpeg_4: 4.3.2 -> 4.4

[vs49688]

Motivation for this change

Updating. This will probably be a big rebuild.

Things done

• Tested using sandboxing (nix.useSandbox on NixOS, or option sandbox in nix.conf on non-NixOS linux)
• Built on platform(s)
  • NixOS
  • macOS
  • other Linux distributions
• Tested via one or more NixOS test(s) if existing and applicable for the change (look inside nixos/tests)
• Tested compilation of all pkgs that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review wip"
• Tested execution of all binary files (usually in ./result/bin/)
• Determined the impact on package closure size (by running nix path-info -S before and after)
• Ensured that relevant documentation is up to date
• Fits CONTRIBUTING.md.

[lukegb]

@ofborg build ffmpeg_4 ffmpeg_4.passthru.tests

(+darwin)

[jonringer]

/rebase staging

[github-actions]

Failed to rebase

[jonringer]

This was already done in #118990, it's currently in staging and will be in the next release

[lukegb]

Hah. Whoops, should've checked staging. Thanks Jon!

[jonringer]

Hah. Whoops, should've checked staging. Thanks Jon!

I only realized it because rebase failed :)

[vcunat]

but darwin fails (in the check you triggered and now on Hydra), so in case you have some ideas...