script to convert sets of jpgs into a single, compact pdf. Works well enough for me. might need some tweaking.

convert_jpgs_pdf.py

import subprocess
 
 
cmd_list_jpg = 'ls -C -1 | grep .jpg'
all_files = subprocess.check_output(cmd_list_jpg, shell = True)
 
for i in all_files.split('\n'):
    if i.find('convert') != -1:
        continue
    subprocess.check_output('convert {0} {0}.pdf'.format(i), shell = True)

cmd_output = 'ls -1 -v | grep jpg.pdf'
 
files = subprocess.check_output(cmd_output, shell = True).split('\n')
 
all_files_in_space = ''
for i in files:
    all_files_in_space += i
    all_files_in_space += ' '
 
 
cmd_convert_cat_pdf = 'pdftk {0} cat output output.pdf'.format(all_files_in_space)
 
subprocess.check_output(cmd_convert_cat_pdf, shell = True)

for i in files:
    if len(i) > 3:
     cmd_rm = 'rm {0}'.format(i)
     subprocess.check_output(cmd_rm, shell = True)