How to Convert From HEIC to JPG in Python on WIndows

As of today, I haven’t found a way to do this with a Python-only solution. If you need a workaround, you can find any Windows command line utility that will do the conversion for you, and call that as a subprocess from Python.

Here is an example option using PowerShell: https://github.com/DavidAnson/ConvertTo-Jpeg

It’s also pretty easy these days to write a .NET-based console app that uses Magick.NET. That’s what I ended up doing.

Just was looking at the same topic. I came across this:

https://pypi.org/project/heic-to-jpg/

I haven’t had time to look more into this, but thought I’d share this.

In the latest version of pillow_heic module, below code will work fine. only read_heif is replaced with read.

from PIL import Image

import pillow_heif

heif_file = pillow_heif.read(r"E:image20210914_150826.heic")

image = Image.frombytes(
    heif_file.mode,
    heif_file.size,
    heif_file.data,
    "raw",

)

image.save(r"E:imagetest.png", format("png"))

Please, use open_heif or PIL.Image.open() if you need some Pillow things to do with image.

pillow-heif supports lazy loading of data.

read_heif and read are slow for files containing multiply images, it will decode all of them during call.

P.S.: I am the author of pillow-heif.

I use this code to convert an image from a form from heic to jpeg a before I save it to a local file system.

This code does some renaming, so it can be saved as FileStorage object in the db with access to filename and mime type.

As function of the Class Converter.

import io
from PIL import Image
import pillow_heif
from werkzeug.datastructures import FileStorage

class Converter:

    def convert_heic_to_jpeg(self, file):
        # Check if file is a .heic or .heif file
        if file.filename.endswith(('.heic', '.heif', '.HEIC', '.HEIF')):
            # Open image using PIL
            # image = Image.open(file)

            heif_file = pillow_heif.read_heif(file)
            image = Image.frombytes(
                heif_file.mode,
                heif_file.size,
                heif_file.data,
                "raw",
            )

            # Convert to JPEG
            jpeg_image = image.convert('RGB')

            # Save JPEG image to memory temp_img
            temp_img = io.BytesIO()
            jpeg_image.save(temp_img, format("jpeg"))

            # Reset file pointer to beginning of temp_img
            temp_img.seek(0)

            # Create a FileStorage object
            file_storage = FileStorage(temp_img, filename=f"{file.filename.split('.')[0]}.jpg")

            # Set the mimetype to "image/jpeg"
            file_storage.headers['Content-Type'] = 'image/jpeg'

            return file_storage
        else:
            raise ValueError("File must be of type .heic or .heif")

Work for me.

from PIL import Image
import pillow_heif


pillow_heif.register_heif_opener()

img = Image.open('c:image.HEIC')
img.save('c:image_name.png', format('png'))