Major refactor to adapt new ffmpeg-core.js

src/node/defaultOptions.js

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+const defaultOptions = require('../constants/defaultOptions');
+
+/*
+ * Default options for node environment
+ */
+module.exports = {
+  ...defaultOptions,
+};

src/node/fetchFile.js

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+const util = require('util');
+const fs = require('fs');
+const fetch = require('node-fetch');
+const isURL = require('is-url');
+
+module.exports = async (_data) => {
+  let data = _data;
+  if (typeof _data === 'undefined') {
+    return new Uint8Array();
+  }
+
+  if (typeof _data === 'string') {
+    if (isURL(_data) || _data.startsWith('chrome-extension://') || _data.startsWith('file://')) {
+      const res = await fetch(_data);
+      data = await res.arrayBuffer();
+    } else if (/data:_data\/([a-zA-Z]*);base64,([^"]*)/.test(_data)) {
+      data = Buffer.from(_data.split(',')[1], 'base64');
+    } else {
+      data = await util.promisify(fs.readFile)(_data);
+    }
+  } else if (Buffer.isBuffer(_data)) {
+    data = _data;
+  }
+
+  return new Uint8Array(data);
+};

src/node/getModule.js

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+module.exports = () => new Promise((resolve) => {
+  const Module = require('@ffmpeg/core');
+  Module.onRuntimeInitialized = () => {
+    resolve(Module);
+  };
+});

src/node/index.js

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+const defaultOptions = require('./defaultOptions');
+const getModule = require('./getModule');
+const fetchFile = require('./fetchFile');
+
+module.exports = {
+  defaultOptions,
+  getModule,
+  fetchFile,
+};