Hi Slider supports different formats image, and you can even add both landscape and portrait photos to the same jQuery image slider. And the output image slider is awesome! For more info: http://www.hislider.com/faq/is-it-possible-to-use-landscape-and-portrait-photos-in-the-same-jquery-slider.html

2. Yes, with Hi Slider, you can add both landscape
and portrait photos in the same jQuery slider.
This amazing jQuery image slider maker does
not only allow you to create different size image
sliders, but also provides you with 3 image sizing
types to match the size of your photos.

3. These 3 types include: Full Fill, Auto Fit and
Scale. No matter what images you use,
landscape or portrait, Hi Slider will present your
viewers with excellent image gallery.

4. Copyright © 2013 Hi Slider. All rights reserved
http://www.hislider.com/faq/is-it-possible-to-use-landscape-
and-portrait-photos-in-the-same-jquery-slider.html