Convert png to jpeg using Pillow

Question

I am trying to convert png to jpeg using pillow. I've tried several scrips without success. These 2 seemed to work on small png images like this one.

First code:

from PIL import Image import os, sys  im = Image.open("Ba_b_do8mag_c6_big.png") bg = Image.new("RGB", im.size, (255,255,255)) bg.paste(im,im) bg.save("colors.jpg") 

Second code:

image = Image.open('Ba_b_do8mag_c6_big.png') bg = Image.new('RGBA',image.size,(255,255,255)) bg.paste(image,(0,0),image) bg.save("test.jpg", quality=95) 

But if I try to convert a bigger image like this one

I'm getting

Traceback (most recent call last):   File "png_converter.py", line 14, in <module>     bg.paste(image,(0,0),image)   File "/usr/lib/python2.7/dist-packages/PIL/Image.py", line 1328, in paste     self.im.paste(im, box, mask.im) ValueError: bad transparency mask 

What am i doing wrong?

Answer 1

You should use convert() method:

from PIL import Image  im = Image.open("Ba_b_do8mag_c6_big.png") rgb_im = im.convert('RGB') rgb_im.save('colors.jpg') 

more info: http://pillow.readthedocs.io/en/latest/reference/Image.html#PIL.Image.Image.convert