Im new and lost

Im new at this and lost.
When I uploaded my images in Istopmotion it said this:
“Unable to decompress selected camera’s image format because a suitable Codec is missing.”
What to do?
I cant change the speed and I want to make all the images a little bit brighter?
Hope to hear from you.

What kind of camera are you using?

Nikon d80

You are getting the message even the images gets imported into the iStopMotion document?

Changing speed and exposure: I suggest that you setup your camera in “manual mode”. Also lock your white balance setting in the camera. Switch off auto focus if applicable. Please refer to the manual of your camera how to do all this. iStopMotion is just triggering the capture button of your camera and don’t have controls on the features of the it.