Refactor to worker version

examples/node/transcode.js

@@ -0,0 +1,12 @@
+const { createWorker } = require('../../src');
+
+const { argv } = process;
+const [,, inputPath, outputPath] = argv;
+
+const worker = createWorker();
+
+(async () => {
+  await worker.load();
+  const { data } = await worker.transcode(inputPath, outputPath.split('.').pop());
+  console.log(data.length);
+})();