Why am I getting the error: "Not a JPEG file: starts with 0x89 0x50"

Question

Why am I getting the message "Not a JPEG file: starts with 0x89 0x50" when I try to open my jpg file?

matt burns · Accepted Answer · 2015-04-01T10:08:56.380

124

The file is actually a PNG with the wrong file extension. "0x89 0x50" is how a PNG file starts.

edited Apr 01 '15 at 10:08

answered Jul 03 '12 at 11:45

matt burns

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I took a screenshot on my iPhone 7 with iOS 12.0.1, then from Photos shared to Google Drive. Used the default/suggested name when saving and had this error when attempting to open on Ubuntu with Image Viewer. After reading this answer, changed the extension to PNG and the file opened without converting or re-saving in another program. – Brent Self Mar 06 '19 at 00:50
1

Thanks for the answer. What does a *jpeg* file start with? – Adarsh TS Oct 16 '20 at 16:26

score 62 · Answer 2 · answered Jul 03 '12 at 11:49

62

Your file is not a JPEG file, it's just been renamed from a PNG to a JPEG somewhere along the way. Some programs will open this as a recognised file extension and infer the type from the prefix, but obviously not the one you're using.

answered Jul 03 '12 at 11:49

David M

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If you'd like to find those files, you can use this StackOverflow link: https://stackoverflow.com/questions/30684796/rename-a-bunch-of-png-images-with-jpg-extension-to-png – zigzag May 25 '17 at 15:04

Liu Hao · Answer 3 · 2021-05-23T03:34:37.713

Your 'JPEG' file has wrong filename extension 'jpg' or 'jpeg', it's real type is most probably a PNG file.

Just try to rename file name from 'xxx.jpg' or 'xxx.jpeg' to 'xxx.png'.

Under most circumstances, programs distinguish file type with filename extension for convenience, however, if we specify a wrong filename extension(like 'jpg') to a file in other format(like a PNG file), the program will still try to load the PNG file with JPG library, an error will certainly be thrown to user.

Actually, different type of files always have different file header (first 1024 byte)

Here's a quick pass to check real type of the file on Unix-like platform:

using the "file" command, like:

file e3f8794a5c226d4.jpg

and output is

e3f8794a5c226d4.jpg: PNG image data, 3768 x 2640, 8-bit/color RGBA, non-interlaced

which will print file information details, and we can also check if the specified file has been destructed.

score 10 · Answer 4 · answered Nov 27 '17 at 16:09

10

simply rename *.jpg to *.png. Or open this file in browser

answered Nov 27 '17 at 16:09

user9015721

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score 2 · Answer 5 · answered May 17 '16 at 13:34

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This is the error response when you try to open a PNG file using a JPEG file viewer which uses libjpeg to open jpeg files. Your file is renamed from png to JPEG as mentioned in earlier answers.

answered May 17 '16 at 13:34

saurabheights

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score 1 · Answer 6 · answered Oct 23 '17 at 08:58

Here is a python script to identify those fault jpg images in a directory.

import glob 
import os 
import re 
import logging 
import traceback

filelist=glob.glob("/path/to/*.jpg")
for file_obj in filelist:
  try:

        jpg_str=os.popen("file \""+str(file_obj)+"\"").read()
        if (re.search('PNG image data', jpg_str, re.IGNORECASE)) or (re.search('Png patch', jpg_str, re.IGNORECASE)):
            print("Deleting jpg as it contains png encoding - "+str(file_obj))
            os.system("rm \""+str(file_obj)+"\"")
  except Exception as e:
    logging.error(traceback.format_exc())
print("Cleaning jps done")

score 1 · Answer 7 · answered Apr 15 '18 at 23:19

Here's a modified version of Mohit's script. Instead of deleting misnamed files, it non-destructively renames them.

It also swaps out the os.system() calls for subprocess calls which solves escaping issues regarding quotes in filenames.

import glob
import subprocess
import os
import re
import logging
import traceback

filelist=glob.glob("/path/to/*.jpg")
for file_obj in filelist:
    try:
        jpg_str = subprocess.check_output(['file', file_obj]).decode()
        if (re.search('PNG image data', jpg_str, re.IGNORECASE)) or (re.search('Png patch', jpg_str, re.IGNORECASE)): 

            old_path = os.path.splitext(file_obj)
            if not os.path.isfile(old_path[0]+'.png'):
                new_file = old_path[0]+'.png'
            elif not os.path.isfile(file_obj+'.png'):
                new_file = file_obj+'.png'
            else:
                print("Found PNG hiding as JPEG but couldn't rename:", file_obj)
                continue

            print("Found PNG hiding as JPEG, renaming:", file_obj, '->', new_file)
            subprocess.run(['mv', file_obj, new_file])

    except Exception as e:
        logging.error(traceback.format_exc()) 

print("Cleaning JPEGs done")

Adding on to Different55's answer. The script works only for Python version 3.5 and above. — Ashwin, Aug 02 '18 at 20:51

Why am I getting the error: "Not a JPEG file: starts with 0x89 0x50"

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