text: var exec;
  exec = require('child_process').exec;
  module.exports = {
    extract: function(path, destPath, time, size, callback) {
      if (time == null) {
        time = '00:00:01';
      }
      if (size == null) {
        size = '200x125';
      }
      return exec('ffmpeg -ss ' + time + ' -i ' + path + ' -y -s ' + size + ' -vframes 1 -f image2 ' + destPath, function( err ) {
        if (callback) {
          return callback( err );
        }
      });
    }
  };
  