Q: Really nice program!
I am using Ken Burns effect with fixed-size images, all the same size, but some of the images don't fill the full-size, so I've created them with a transparent "frame". In other words, for instance, my image file is 400x300, but my photo is 300 x 200, so the remaining space is transparent.
So, when I process the photos, the transparent space turns RED!
A: Actually, wowslider app. generates .jpg images only.
But you can change them on .png images manually.
1) Upload your .png images to data/images folder
2) Change image format in generated .html code. For example:
... <span><img src="data1/images/image1.jpg" alt="" title="" id="wows1"/></span> ...
... <span><img src="data1/images/image1.png" alt="" title="" id="wows1"/></span> ...