Did you try with 400 jpeg. result: convert toke all the memory by default and after 20min i kill the process!

I think it's "imagemagick" instead of "imageimagick".

It worked!! ;)

Thanks

i had the same memory problem with convert.

but it worked to first convert one file at a time, then use pdftk to assemble the individual pdfs.

my input files were hpscan001.png, hpscan002.png, etc. so i typed:

me@myhost:~$ for file in `ls *.png`; do convert $file `basename $file .png`.pdf; done me@myhost:~$ pdftk *.pdf cat output finished-product.pdf