There's nothing built in now, but a common technique would be to make the image e.g. ~10px larger in each direction, and then choose a random crop every other second.

It should be really easy to build a FrameOS app that does this. Add one node at the start of the render loop to increase the image accordingly, and one at the end to crop it back down. I was planning to use a similar technique to display smooth scrolling animations/slideshows, but it can definitely be used to prevent burnin.