Added argument to freeze for setting the end frame, speed is now aware of variable framerates

commands/image-editing/freeze.js

@@ -1,12 +1,17 @@
 const ImageCommand = require("../../classes/imageCommand.js");
 
 class FreezeCommand extends ImageCommand {
-  params = {
-    loop: false
-  };
+  params(args) {
+    const frameCount = parseInt(args[0]);
+    return {
+      loop: false,
+      frame: isNaN(frameCount) ? -1 : frameCount
+    };
+  }
 
   static description = "Makes an image sequence only play once";
   static aliases = ["noloop", "once"];
+  static arguments = ["{end frame number}"];
 
   static requiresGIF = true;
   static noImage = "you need to provide an image to freeze!";