Compression options are one factor. The pixel size of the image is linearly related to the file size. If you are generating a size of 600X800 or more you will make a very large file. Also consider the color depth. 256 (8bit) is usually good enough. Moving to 16 bit, true color (16M colors) causes big increases in file size. The sound track can be reduced a lot by converting it to mono and reducing the fidelity (if you are willing to give up the fidelity. You may want to consider output in MPEG format because of its high compression and relatively low loss of quality. Finally, you may be able to reduce the frame rate (frames per second) to reduce the size. Again this will affect quality but worth playing around with. tmech