How to Build a Avi To Mp4 Converter

// Generic file conversion pattern
async function convertFile(input, outputFormat, options = {}) {
  // 1. Detect input format
  const inputFormat = detectFormat(input);

  // 2. Choose conversion path
  const converter = getConverter(inputFormat, outputFormat);

  // 3. Process with progress
  const result = await converter.convert(input, {
    ...options,
    onProgress: (percent) => updateProgress(percent)
  });

  return result;
}

// FFmpeg-based conversion
async function ffmpegConvert(input, output, codecOptions) {
  const args = [
    '-i', input,
    ...buildCodecArgs(codecOptions),
    output
  ];

  return await runFFmpeg(args);
}