this module does nothing but will be replaced during export. if the graph has
more frames than a still image, the o-vid module will be used. otherwise this
will be o-jpg. use in conjunction with vkdt gallery to create a website.
note that the gui will also setup dual output to write the jpg/mp4 as well as
a small thumbnail image (forked from the same processing pipeline). these are
used by vkdt gallery to show the overview grid of images.