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pyapng's Issues

integer out of range for 'I' format code

Whenever I try to use this I get the error code integer out of range for 'I' format code

e.g.

APNG.from_files(images, delay=100).save('test.png')

Where images is a list of filepaths returns this error.

Python 2.7

Pass repeat count by argument

Is it possible to pass a repeat count to the apng file? At the moment the repeat count stands at "-1" for repeat forever? Does the specification for apng even support repeat count?

APNG_DISPOSE_OP_PREVIOUS not handled

I got an APNG from here.

I tried extracting the frames using this, but found that there is a frame being extracted in only 1x1. Here's the extraction result

image

Then I used APNG Disassembler to extract the frames, I got that "missing frame".

image

It appears that frame 6 and 8 are the same, but frame 8 cannot be extracted using this. Here's the chunk structure acquired by pngcheck v2.3.0:

image

That fdAT at 0x226 with length only 17 is the missing one. I tried finding information by inspecting the documentation of both APNG and PNG, but cannot find any information about potentially reusing the frame. All other chunks seems also not indicating this reuse.

How to handle this case?

Note

not install the test

Hi

actualliy when run python setup.py install --root=<foo> --optimize, the test folder is also installed

please leave it out from installation

greetings

PNG Frame Extract Weirdness

Been banging my head on writing an apng extraction myself. It somewhat works, but I run into issues with this file. Looks like your method runs into issues too..

The file was manually edited by the author to set the number of frames to 1. The technique of looking at the chunks themselves obviously gets by that. However, many of the images that get pulled out are corrupt.

My knowledge of PNG isn't the greatest, so I'm not sure if they're corrupt due to some process error in extracting or if they started that way... Either way, both of our extraction approaches cause some of the output files to be errored.

p1ng

Installed apng, but it seems to be empty

I've had the same results with Python 2.7 and 3.6.

import apng
method_list = [func for func in dir(apng) if callable(getattr(apng, func))]
print(method_list)
[]

Specifically,

from apng import APNG
"Cannot find reference 'APNG' in apng.py."

Maybe I am missing a dependency? I installed apng from the terminal for 3.6 and using the GUI in PyCharm for 2.7.

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