Function get_media_duration_callback

apps/backend/utils.js:97–126

* @brief Get media file duration and metadata (callback version) * * @param file_path [in] Path to media file * @param callback [in] Function(err, result) * - err: Error if operation failed * - result: Object with duration, file_type, mime_type * * @note Uses ffprobe for metadata ex

(file_path, callback)

 * @note Validates media type before processing
 */
function get_media_duration_callback(file_path, callback) {
  is_media_file_callback(file_path, (err, is_media) => {
    if (err) {
      return callback(err);
    }

    if (!is_media) {
      return callback(new Error('Not a supported media file'));
    }

    ffprobe.ffprobe(file_path, (err, metadata) => {
      if (err) {
        console.error('FFprobe Error:', {
          message: err.message,
          code: err.code,
          file_path: file_path
        });
        return callback(err);
      }

      const duration = metadata.format?.duration || 0;
      
      callback(null, {
        duration: duration,
        file_type: path.extname(file_path),
        mime_type: mime.lookup(file_path)
      });
    });
  });
}