I am looking for a simple way to turn a video into one image. I want each frame to be added to together to create one (over exposed) image. The point of this is I am trying to convert a video of me using a light to write in the air into a picture of 'Light Graffiti'. At the moment I can export each frame into a folder called 1.jpg, 2.jpg, 3.jpg ect. But I need a way to merge (Adding) these images literally on top of each other.
I don't have Photoshop but I can use Paint.net or Gimp.
What is the easiest way to batch merge a folder of images using add or is there an easier way to do this?