Is there a max number of .png files that I can append to create a .gif file with imageio?

[Nirandika Wanigasekara]

I am using the following code to create a .gif file from .png files. I am trying to append around 3000 .png files. Eventhough filenames array has all the files I need to append the resulting .gif file has only 756 .png files. 

Is this a limitation with imageio? Have you limited some memory constraints for mode ='I', if so how can I override it? What other alternative solution do I have to create a .gif from 3000 .png files?

Hope someone can help me with this. Thank you!

import imageio
import os

filenames =[]
dirPath = "D:\\BandSim_2017-06-20_12_00_45\\"
for file in os.listdir(dirPath):
    if file.endswith(".png"):
        filenames.append(dirPath+file)

# print filenames
moviePath ="D:\\simulation.gif"
with imageio.get_writer(moviePath,format='gif', mode='I', duration=0.1, loop=1) as writer:
    i=0
    for filename in filenames[0:7  ]:
        image = imageio.mimread(filename)
        writer.append_data(image)
        print filename
writer.close()

[Almar Klein]

Hi Nirandika,

 

No, especially when used properly, as you are doing, the writer should not have any memory limits, as new data is added to the file and not kept in memory.

 

I do see that you’re sliceing the filenames list, and i never seems to be increased. How have you found the number of images in the resulting GIF?

 

- Almar

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[Nirandika Wanigasekara]

Hi Almar, 

I have a unique number in each image which is increasing one by one. This is how I find the number of .png files in the gif. 

Something seems to be prohibiting me from appending more than 756 images. Would be nice to know why. 

[Almar Klein]

Could you increase i in the loop and verify that its 3000 when it finishes (i.e. append_data() is called 3000 times)? That should narrow it down a bit.

 

Thanks,