How to Convert From HEIC to JPG in Python on WIndows

Question

Im trying to convert HEIC to JPG using python. The only other answers about this topic used pyheif. I am on windows and pyheif doesn't support windows. Any suggestions? I am currently trying to use pillow.

Answer 1

The following code will convert an HEIC file format to a PNG file format

from PIL import Image
import pillow_heif

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

image.save("./picture_name.png", format("png"))

Answer 2

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")

Answer 3

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:\image\20210914_150826.heic")

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

)

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

Answer 4

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.

Answer 5

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.

Answer 6

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'))

Answer 7

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.

Answer 8

Here is an easy implementation to convert a folder of files from HEIC to JPG

    import os
    from PIL import Image
    import pillow_heif
    
    
    def convert_heic_to_jpeg(heic_path, jpeg_path):
        img = Image.open(heic_path)
        img.save(jpeg_path, format='JPEG')
    
    
    def convert_all_heic_to_jpeg(input_folder, output_folder):
        # Register HEIF opener with Pillow
        pillow_heif.register_heif_opener()
    
        # Create output folder if it doesn't exist
        if not os.path.exists(output_folder):
            os.makedirs(output_folder)
    
        # List all files in input folder
        for filename in os.listdir(input_folder):
            # Check if file is a HEIC file
            if filename.endswith(".heic") or filename.endswith(".HEIC"):
                # Build full path to input and output file
                heic_path = os.path.join(input_folder, filename)
                jpeg_filename = f'{os.path.splitext(filename)[0]}.jpg'
                jpeg_path = os.path.join(output_folder, jpeg_filename)
    
                # Convert HEIC to JPEG
                convert_heic_to_jpeg(heic_path, jpeg_path)
    
    
    # Example usage
    input_folder = 'images'
    output_folder = 'converted'
    convert_all_heic_to_jpeg(input_folder, output_folder)