Virtualdub - anyone with advice for importing photo-series

this will be a complaint:
Virtualdub can not seriously deal with pictures, as they all need to have the same size, the rendering-engine is too weak to to convert photos on a fly. (I would have used WindowsMovieMaker, the work is a charm - in former times, but now it is part of the unwanted LIVE-essentials)
It would not be a problem, if there where a tool, but my complaint is, that there is no serious work-around for that, no plug-in, none of the photo-editors is able to convert to lets say HD-size and add the borders , no tool doing that in batch-mode etc ...

Someone here for any advice?

thanks
mh