Nodejs, Graphic Magick と Image Magickを使って実装。

Question

困ってること

https://stackoverflow.com/questions/39764846/imagemagick-best-fit-text-within-rectangle
を参考にしてnodejs で同じような実装をしたい。

$convert sea.jpg -size 173x50! caption:"A considerably longer text that will result in a smaller font being chosen" -geometry +312+66 -composite result.png

自身の..

const gm = require('gm');

const constant = require('../../shared/constant');
class GM {
  /**
   * constructor of Gm
   */
  constructor() {
    this._gm = gm.subClass({imageMagick: true});
  }

  async test() {
    this._gm('海の画像')
      .out('caption:"C considerably longer text that will result in a smaller font being chose　A considerably longer text that will result in a smaller font being chosenA considerably longer text that will result in a smaller font being chosen"')
      .geometry('+0+0')
      // .composite(APPEAL_IMAGE_PATH)
      .write('public/images/results/TEXT.png', err => {
        if(err) {console.log(err)};
      });
  }
}

module.exports = GM;

色々やってみましたが、なかなかうまくいきません。ご教授いただけると幸いです。