Our cardiac ultrasound machine exports clips as wmv files. Even the still images are exported as a wmv file, albeit a single frame.
I have a profile set up on vtm so it just converts the first frame. Works fine on the 'movies' but with the 'stills' it just outputs a blank black image. If I open the wmv in something like TMPGEnc it shows the single frame ok.
I've exported a couple of examples.
http://www.box.net/shared/18fmpn853j (a movie)
http://www.box.net/shared/g61n0f9pxu (a still)
If anyone can help me get this working I'd be delighted!