Decode Cyrillic metadata in mp3 files fixing gibberish files description saved in windows 1251 encoding | using NodeJS

index.js

import mm from 'music-metadata';
import { promises as fs } from 'fs';
import path from 'path';
import iconv from 'iconv-lite';
import NodeID3 from 'node-id3';

// Function to convert from Windows-1251 to UTF-8
function convertFromWin1251(buffer) {
  return iconv.decode(buffer, 'win1251');
}

// Recursive function to process all MP3 files in a directory
async function processDirectory(directory) {
  const items = await fs.readdir(directory, { withFileTypes: true });
  for (const item of items) {
      const fullPath = path.join(directory, item.name);
      if (item.isDirectory()) {
          await processDirectory(fullPath); // Recurse into subdirectories
      } else if (path.extname(fullPath).toLowerCase() === '.mp3') {
          await processAndWriteMetadata(fullPath); // Process MP3 files
      }
  }
}

// Function to read, transliterate, and write metadata
async function processAndWriteMetadata(filePath) {
  try {
      const metadata = await mm.parseFile(filePath);
      const tags = metadata.common;

      // Convert and transliterate title and artist from Windows-1251 to UTF-8
      if (tags.title) tags.title = convertFromWin1251(Buffer.from(tags.title, 'binary'));
      if (tags.artist) tags.artist = convertFromWin1251(Buffer.from(tags.artist, 'binary'));
      if (tags.album) tags.album = convertFromWin1251(Buffer.from(tags.album, 'binary'));
      if (tags.copyright) tags.copyright = convertFromWin1251(Buffer.from(tags.copyright, 'binary'));


      // Write the new metadata to the file
      NodeID3.write(tags, filePath, function(err) {
          if (err) console.error(`Error writing metadata to file ${filePath}: ${err}`);
          else console.log(`Metadata successfully written to ${filePath}`);
      });

  } catch (error) {
      console.error(`Error processing file ${filePath}: ${error.message}`);
  }
}

// Start the processing with a given root directory
processDirectory('./path-to-folder-with-mp3-files');

package.json

{
  "type": "module",
  "dependencies": {
    "iconv-lite": "^0.6.3",
    "music-metadata": "^7.14.0",
    "node-id3": "^0.2.6"
  }
}