ffmpeg: 4.3.2 -> 4.4

https://github.com/FFmpeg/FFmpeg/blob/n4.4/Changelog

pkgs/development/libraries/ffmpeg/3.4.nix

@@ -1,4 +1,4 @@
-{ callPackage, fetchpatch
+{ callPackage
 # Darwin frameworks
 , Cocoa, CoreMedia
 , ...

pkgs/development/libraries/ffmpeg/4.nix

@@ -1,12 +1,12 @@
-{ callPackage, fetchpatch
+{ callPackage
 # Darwin frameworks
 , Cocoa, CoreMedia, VideoToolbox
 , ...
 }@args:
 
 callPackage ./generic.nix (rec {
-  version = "4.3.2";
-  branch = "4.3";
-  sha256 = "0flik4y7c5kchj65p3p908mk1dsncqgzjdvzysjs12rmf1m6sfmb";
+  version = "4.4";
+  branch = "4.4";
+  sha256 = "03kxc29y8190k4y8s8qdpsghlbpmchv1m8iqygq2qn0vfm4ka2a2";
   darwinFrameworks = [ Cocoa CoreMedia VideoToolbox ];
 } // args)

pkgs/development/libraries/ffmpeg/generic.nix

@@ -213,7 +213,8 @@ stdenv.mkDerivation rec {
 
   meta = with lib; {
     description = "A complete, cross-platform solution to record, convert and stream audio and video";
-    homepage = "http://www.ffmpeg.org/";
+    homepage = "https://www.ffmpeg.org/";
+    changelog = "https://github.com/FFmpeg/FFmpeg/blob/n${version}/Changelog";
     longDescription = ''
       FFmpeg is the leading multimedia framework, able to decode, encode, transcode,
       mux, demux, stream, filter and play pretty much anything that humans and machines