Add tests

src/types/ffmpeg/.eslintrc.cjs

@@ -0,0 +1,13 @@
+module.exports = {
+  extends: [
+    "eslint:recommended",
+    "plugin:@typescript-eslint/recommended",
+    "plugin:@typescript-eslint/recommended-requiring-type-checking",
+  ],
+  parser: "@typescript-eslint/parser",
+  parserOptions: {
+    tsconfigRootDir: __dirname,
+    project: ["../../../tsconfig.json"],
+  },
+  plugins: ["@typescript-eslint"],
+};

src/types/ffmpeg/ffmpeg.d.ts

@@ -29,10 +29,6 @@ export interface FFmpegModule {
   setLogger: (logger: (log: Log) => void) => void;
   setTimeout: (timeout: number) => void;
   setProgress: (handler: (progress: number) => void) => void;
-
-  _ffmpeg: (args: number, argv: StringArrayPointer) => number;
-  stringToPtr: (str: string) => Pointer;
-  stringsToPtr: (strs: string[]) => Pointer;
 }
 
 declare function createFFmpeg(): Promise<FFmpegModule>;