You can adjust the Python code in this folder to convert WordPress style caption tags
[caption id="attachment_69281" align="aligncenter" width="229"] <a href="http://martin-thoma.com/wp-content/uploads/2013/06/amazon-double-domination.jpg"> <img src="http://martin-thoma.com/wp-content/uploads/2013/06/amazon-double-domination-229x300.jpg" alt="Amazon doesn't like band no. 4 of "The Dresden Files"" width="229" height="300" class="size-medium wp-image-69281" /> </a> Amazon doesn't like band no. 4 of "The Dresden Files" [/caption]
to my caption tags
{% caption align="aligncenter" width="229" caption="Amazon doesn't like band no. 4 of 'The Dresden Files'" url="../images/2013/06/amazon-double-domination.jpg" alt="Amazon doesn't like band no. 4 of "The Dresden Files"" height="300" class="size-medium wp-image-69281" title="Amazon doesn't like band no. 4 of 'The Dresden Files'" %}
This is not necessary for my plugin, but it “could come in handy some day” :-)