Some cameras offer the option of 8 bit output, or you might be able to do it in MAX. If not, you will need to convert each image from 16 bit to 8 bit using a 4 bit shift and IMAQ Cast Image. Wire the 16 bit image as the source and an 8 bit image as the destination. Wire the output image to the AVI Write vi.
Bruce
Bruce Ammons
Ammons Engineering