I think that there's a bug in con, to convert a png
sequence to an avi file.
I use it this way :
conv -it png -ot avi -s my_first_image.png out.avi
the program performs well, but the output avi file is
flipped at 180 deg! (the top is at the bottom and the
bottom at the top)
g.forbin@surrey.ac.uk