Basic Python Script for running Tesseract OCR on PDFs

convert.py

import os			    # for magick and tesseract commands
import time			  # for epoch time
import calendar 	# for epoch time
from PyPDF2 import PdfFileMerger

dir_files = [f for f in os.listdir(".") if os.path.isfile(os.path.join(".", f))]
epoch_time = int(calendar.timegm(time.gmtime()))
print(dir_files)

for file in dir_files: # look at every file in the current directory
	if file.endswith('.pdf'): # if it is a PDF, use it
		print('Working on converting: ' + file)
		# setup
		file = file.replace('.pdf', '') # get just the filepath without the extension
		folder = str(int(epoch_time)) + '_' + file # generate a folder name for temporary images
		combined = folder + '/' + file # come up with temporary export path
		# create folder
		if not os.path.exists(folder): # make the temporary folder
			os.makedirs(folder)
		# convert PDF to PNG(s)
		magick = 'convert -density 150 "' + file + '.pdf" "' + combined + '-%04d.png"'
		print(magick)
		os.system(magick)
		# convert PNG(s) to PDF(s) with OCR data
		pngs = [f for f in os.listdir(folder) if os.path.isfile(os.path.join(folder, f))]
		for pic in pngs:
			if pic.endswith('.png'):
				combined_pic = folder + '/' + pic
				print(combined_pic)
				tesseract = 'tesseract "' + combined_pic + '" "' + combined_pic + '-ocr" PDF'
				print(tesseract)
				os.system(tesseract)
		# combine OCR'd PDFs into one
		ocr_pdfs = [f for f in os.listdir(folder) if os.path.isfile(os.path.join(folder, f))]

		merger = PdfFileMerger()
		for pdf in ocr_pdfs:
			if pdf.endswith('.pdf'):
				merger.append(folder + '/' + pdf)

		merger.write(file + '-ocr-combined.pdf')
		merger.close()

getting this error
PS D:> python ./convert.py
['1.pdf', 'convert.py']
Working on converting: 1.pdf
convert -density 150 "1.pdf" "1738563963_1/1-%04d.png"
Invalid Parameter - 150

getting this error PS D:> python ./convert.py ['1.pdf', 'convert.py'] Working on converting: 1.pdf convert -density 150 "1.pdf" "1738563963_1/1-%04d.png" Invalid Parameter - 150

apparently the new way to use imagemagick is
magick convert -density 150 "1.pdf" "1738563963_1/1-%04d.png"
instead of
convert -density 150 "1.pdf" "1738563963_1/1-%04d.png"

in line 18 of the script should be
magick = 'magick convert -density 150 "' + file + '.pdf" "' + combined + '-%04d.png"'

if it still shows error try just removing the convert and use only 'magick -density....etc'