print 2 pages per sheet and double side

print_2p1d.py

# rearrange pages
def gen(n4):
  n = n4//4
  a1 = [[4*n-2*i, 2*i+1, 2*i+2, 4*n-2*i-1] for i in range(n)]
  return [str(k) for x in a1 for k in x]

'''
Example: ','.join(gen(44))
Output: '44,1,2,43,42,3,4,41,40,5,6,39,38,7,8,37,36,9,10,35,34,11,12,33,32,13,14,31,30,15,16,29,28,17,18,27,26,19,20,25,24,21,22,23'
'''

# Usage:
# pdfjam input.pdf 'OUTPUT_STRING' --a4paper --rotateoversize false --outfile output.pdf