Convert PNG images from folder to JPG - Python

Question

Can anyone show me how i can convert all png images in my local folder to jpg images? I've tried using the following code

path1 = r'C:\Users\david.han\Desktop\COPY_images_files' 

path2 = r'C:\Users\david.han\Desktop\JPG converter'

files_to_convert = (f for f in os.listdir(path1) if f.endswith(".png"))
for filename in files_to_convert:
    im = Image.open(os.path.join(path1, filename))
    root, _ = os.path.splitext(filename)
    jpg_file = os.path.join(path2, f'{root}.jpg')
    im.save(jpg_file)

I keep getting this error "OSError: cannot write mode P as JPEG"

Does this answer your question? [Getting "cannot write mode P as JPEG" while operating on JPG image](https://stackoverflow.com/questions/21669657/getting-cannot-write-mode-p-as-jpeg-while-operating-on-jpg-image) — Kaia, Aug 27 '20 at 00:15
https://stackoverflow.com/a/21669827/1275942 This looks like a similar error; I'm guessing the PNGs are in a weird mode (for instance, PNGs can have an alpha channel while JPGs don't; I don't know the particulars of the "P" mode, but I'd guess it's that or something similar — Kaia, Aug 27 '20 at 00:17
that sounds about right, will look into the link more, thanks — David Han, Aug 27 '20 at 00:22

score 0 · Answer 1 · answered Aug 27 '20 at 05:10

0

I've decided to keep JPG but in case anyone wants to know how to change png to jpg

enter code here


from PIL import Image 
import os 

path = r'C:\Users\david.han\Desktop\COPY_images_files'

for file in os.listdir(path): 
    if file.endswith(".jpg"): 
        img = Image.open(file)
        file_name, file_ext = os.path.splitext(file)
        img.save('/png/{}.png'.format(file_name))

answered Aug 27 '20 at 05:10

David Han

47
3
8

In your code, you try to change .jpg file as your if statement should return true. So you, should have put **if not file.endswith(".jpg")** – Nijat Mursali Mar 11 '22 at 18:21

score 0 · Answer 2 · answered Mar 11 '22 at 18:23

Correction to David's code:

from PIL import Image 
import os 

path = r'enter_path_to_images'

for file in os.listdir(path): 
    if not file.endswith(".jpg"): 
        img = Image.open("{path}/{file}")
        file_name, file_ext = os.path.splitext(file)
        img.save('/png/{}.png'.format(file_name))

In this case, we also need to add the correct path not to get any errors.

Convert PNG images from folder to JPG - Python

2 Answers2