Shopify - Strip image out of blog article excerpt

Shopify - Strip image out of blog article excerpt

{% assign sizes = '_pico.,_icon.,_thumb.,_small.,_compact.,_medium.,_large.,_grande.,_1024x1024.,_2048x2048.,_master' | split: ',' %}
{% assign default_image = 'filename.jpg] %}

{% for a in blog.articles %}

{% assign src = null %}

{% if excerpt contains "<img" %}
    {% assign src = excerpt | split: 'src="' %}
    {% assign src = src[1] | split: '"' | first | replace: '//cdn', 'http://cdn'; | replace: 'http:http://';, 'http://'; | remove: 'https:' %}
	{% for s in sizes %}
	{% assign src = src | replace: s, '_large.' %}
	{% endfor %}
{% endif %}

<article>
<header>
	  <h3>{{ a.title | link_to: a.url }}</h3>
	</header>
	<section>
	  <a href="{{ a.url }}" title="View {{ a.title }}">
	  {% if src != null %}
	    <img src="{{ src }}" alt="{{ a.title }}>
	  {% else %}
	    <img src="{{ default_image | asset_url }}" alt="{{ a.title }}>
	  {% endif %}
	  </a>
	  <p>{{ a.content | strip_html | truncatewords: 50 }}</p>
	 </section
</article>

{% endfor %}