AKVIS OilPaint supports the Batch Processing feature that lets you automatically convert a series of images with the same effect settings and saves you time and efforts. It is useful when creating a number of illustrations at the same style for a booklet or when processing all frames of video.
If you use the standalone version of AKVIS OilPaint, read the instructions here.
If you use the OilPaint plugin in Photoshop, use this tutorial.