How to compress PDF when creating from GIF files?

Question

I have ~200 gif black-and-white files, 600-900 Kb each. The overall size is about 102 Mb. I create pdf from them -

convert *.gif result.pdf

result.pdf file size is about 98 Mb. But I need a PDF file of size less than 25 Mb. I tried different options - compress, quality, density - but none of them helped.

What else could I try?

Answer 1

Try

convert 150_orig.gif -compress FAX -type bilevel tiff:- | convert - result.pdf

This reduces the file size from 613448B to 157477B.