Pythonista crashes trying to save merged photo

cvp

@JonB unfortunately there is no log generated 😢 , like often for crash due to memory problems

jm2466

Sorry for the delay in replying and thanks for the help.

So from the above suggestions it appears deleting the photos once merged may be the best solution but I am not quite sure how to do that correctly. This is an extension so will receive the selected photos that I believe are just references/names of the photos and not the actual image - is that correct? My code then loops through the list and actually gets the photos and adds to a list. First it sounds like I should not get all of them before processing but rather merge each one as it is retrieved. Once that is done I need to “delete” it in the program, or really just delete/remove it from program memory what is the best way to do this without deleting the actual photo?

Thanks

ccc

for asset in assets:
    image = asset.get_image()
    images.append(image)
    del image

jm2466

Thanks!!

jm2466

I added the del image after it is pasted into the merged image and that part appears to work. The program is now having a problem saving the merged image to the camera roll. If I instead save it to the Pythonista file system it works and is a workaround until the camera roll save is figured out. Any other thoughts on how to fix the camera roll save is greatly appreciated.

ccc

Do you have a GitHub repo? It is more difficult to debug English prose that it is to debug Python code.

jm2466

Unfortunately I do not.

But if you look at the code in my original post I added one line in the for loop to delete the image (below is the loop from that post with the del at the end)

    for im in images:
        # paste in the image at the left edge (x=0) and current offset for y
        new_im.paste(im, (0,y_offset))
        print(f'y_offset = {y_offset}')
        # increase the offset by the height of current pic
        y_offset += im.size[1]
        del im

As mentioned that seemed to fix the issue pasting more than a few images into the new one.

This line crashes Pythonista:

    photos.save_image(new_im)

But I can save it to the Pythonista file system with the following:

    new_im.save('combined.jpg')

ccc

This is long shot but:

del new_img
photos.save(Image.open('combined.jpg'))

jm2466

Thanks. I tried that but it crashes trying to save the image to the camera roll. I can open the jpg in Pythonista and manually add it to the camera roll. Here are the lines at the end that I added:

	new_im.save('combined.jpg')
	del new_im
	photos.save_image(Image.open('combined.jpg'))

cvp

@jm2466 I'm in holiday, thus perhaps not able to correctly understand all (🍷🍷) but why did you not use

photos.create_image_asset(path)

instead of

photos.save_image(Image.open(path))

jm2466

Um... because you never told me to until now??? :) kidding of course. But honestly have no real answer to that question. Possibly because I wanted to save an in-memory image and not have to save the file locally first (at least that was the initial plan but is not where I am at with it now). Not sure if create image asset supports that (I tried passing the variable and got an error that a str is required).

I just tried your suggestion and it works - I mean it saves the locally saved combined.jpg to the camera roll. Thanks!!!

Any thoughts on how to get this to work without saving combined.jpg first???

cvp

@jm2466 You could always convert your PIL Image into an ui.Image and use this kind of code to save it in camera roll

# only to have an ui.Image
import ui
img = ui.Image.named('test:Bridge')

# Create a PHAsset from an ui.Image (not from a PIL Image)
from objc_util import *
import threading

NSBundle.bundleWithPath_('/System/Library/Frameworks/Photos.framework').load()
PHPhotoLibrary = ObjCClass('PHPhotoLibrary')
PHAssetChangeRequest = ObjCClass('PHAssetChangeRequest')

lib = PHPhotoLibrary.sharedPhotoLibrary()
def change_block():
    req = PHAssetChangeRequest.creationRequestForAssetFromImage_(img)
def perform_changes():
    lib.performChangesAndWait_error_(change_block, None)

t = threading.Thread(target=perform_changes)
t.start()
t.join()

cvp

@jm2466 this

    # 1) convert PIL Image to ui.Image
    console.hud_alert('convert PIL Image into ui.Image')
    with io.BytesIO() as bIO:
        new_im.save(bIO, 'PNG')
        ui_image = ui.Image.from_data(bIO.getvalue())
    del bIO
    # 2) Create a PHAsset from an ui.Image (not from a PIL Image)
    console.hud_alert('Create a PHAsset from an ui.Image')
    lib = PHPhotoLibrary.sharedPhotoLibrary()
    def change_block():
        req = PHAssetChangeRequest.creationRequestForAssetFromImage_(ui_image)
    def perform_changes():
        lib.performChangesAndWait_error_(change_block, None)
    t = threading.Thread(target=perform_changes)
    t.start()
    t.join()

is about (😀) 1000 x slower than

    path = 'temp.jpg'
    new_im.save(path , quality=95)
    photos.create_image_asset(path)
    os.remove(path)