-mf & mf:// is a special filter (necessary dor jpegs)
'mf://*.JPG' takes all JPGs (big cases!) frim the current directoy
6 Frames per Second
Downsize high-res-images to DVD (720:576)
mencoder -ovc lavc -mf fps=6:type=jpg 'mf://*.JPG' -ofps 6 -vf scale=720:576,expand=720:576 -lavcopts aspect=16/9 -noskip -o lego1.mp4