Adopt lerna and typescript

packages/ffmpeg/src/index.js

@@ -0,0 +1,36 @@
+require('regenerator-runtime/runtime');
+const createFFmpeg = require('./createFFmpeg');
+const { fetchFile } = require('./node');
+
+module.exports = {
+  /*
+   * Create ffmpeg instance.
+   * Each ffmpeg instance owns an isolated MEMFS and works
+   * independently.
+   *
+   * For example:
+   *
+   * ```
+   * const ffmpeg = createFFmpeg({
+   *  log: true,
+   *  logger: () => {},
+   *  progress: () => {},
+   *  corePath: '',
+   * })
+   * ```
+   *
+   * For the usage of these four arguments, check config.js
+   *
+   */
+  createFFmpeg,
+  /*
+   * Helper function for fetching files from various resource.
+   * Sometimes the video/audio file you want to process may located
+   * in a remote URL and somewhere in your local file system.
+   *
+   * This helper function helps you to fetch to file and return an
+   * Uint8Array variable for ffmpeg.wasm to consume.
+   *
+   */
+  fetchFile,
+};