opencv: pin to ffmpeg_7

pkgs/by-name/ml/mlt/package.nix

@@ -6,7 +6,7 @@
   cmake,
   pkg-config,
   which,
-  ffmpeg,
+  ffmpeg_7,
   fftw,
   frei0r,
   libdv,
@@ -71,8 +71,8 @@ stdenv.mkDerivation rec {
   ];
 
   buildInputs = [
-    (opencv4.override { inherit ffmpeg; })
-    ffmpeg
+    (opencv4.override { inherit ffmpeg_7; })
+    ffmpeg_7
     fftw
     frei0r
     libdv
@@ -137,7 +137,7 @@ stdenv.mkDerivation rec {
   '';
 
   passthru = {
-    inherit ffmpeg;
+    ffmpeg = ffmpeg_7;
   };
 
   passthru.updateScript = gitUpdater {

pkgs/development/libraries/opencv/4.x.nix

@@ -58,7 +58,7 @@
   enableVtk ? false,
   vtk,
   enableFfmpeg ? true,
-  ffmpeg,
+  ffmpeg_7,
   enableGStreamer ? true,
   elfutils,
   gst_all_1,
@@ -369,7 +369,7 @@ effectiveStdenv.mkDerivation {
     openjpeg
   ]
   ++ optionals enableFfmpeg [
-    ffmpeg
+    ffmpeg_7
   ]
   ++ optionals (enableGStreamer && effectiveStdenv.hostPlatform.isLinux) [
     elfutils