Extract photos from PDF files

[2helium]

Would Keka support extracting photos from PDF files in future? BtterZp had already import this feature and its very useful.

[aonez]

This is supported already, just be sure to extract the file instead of compressing it (default).

You can force the extraction using the contextual menu in Finder or by dropping the PDF to the lower section of the Keka window (secondary action).

[2helium]

Thank you for the instant reply!
I tried to extract a PDF file by Keka in right-click, but got a error:

Error log

OS: 版本13.3.1（版号22E261） (x86_64) Keka: v1.2.61-r5114 (WEB) (Sandboxed) (zh-Hans) Format detected: Unknown Binary used: keka7zz Arguments: ( x, "**my File**", "-o**my file**.kextraction/Operation", "-snld", "-aou", "-xr!__MACOSX", "-xr!.DS_Store", "-xr!.localized", "-xr!._*", "-xr!.FBC*", "-xr!.Spotlight-V100", "-xr!.Trash", "-xr!.Trashes", "-xr!.background", "-xr!.TemporaryItems", "-xr!.fseventsd", "-xr!.com.apple.timemachine.*", "-xr!.VolumeIcon.icns", "-bsp1" )

7-Zip (z) 22.01 (x64) : Copyright (c) 1999-2022 Igor Pavlov : 2022-07-15 : Modified by aone for Keka
64-bit locale=en_US.UTF-8 Threads:8

Scanning the drive for archives:
0M Scan route

1 file, 33802934 bytes (33 MiB)

Extracting archive: my file.pdf
24% Open
ERROR: my file.pdf
Cannot open the file as archive

24%

Can't open as archive: 1
Files: 0
Size: 0
Compressed: 0

Error code 2

[aonez]

@2helium does that file contain images? If so can you share it, here or at info@keka.io?

[2helium]

Hello @aonez
I just make a new PDF from a picture by Preview. It can be extracted by other software, but still can't be extracted by Keka and met a same error. I removed and re-installed Keka but nothing change.
My device :MBP 2018 + macOS 13.3.1
Keka.pdf

[aonez]

Thanks for all the feedback @2helium. Indeed it was not working properly, this version should be fixed:
Keka-v1.2.62.r5159

Let me know if that works for you.

[2helium]

Hello @aonez
The new version works properly with most of PDFs on my device. Thank you for efficient bug fixing!
Here's also a few PDFs that neither Keka nor other software can extract the pics inside. A sample is attached :
Sample.pdf

[aonez]

Ok I also got this one fixed in the Keka iOS version, will try to release a test version for macOS tomorrow.

[aonez]

@2helium I have found the issue but can you share some more samples that fail so I can properly fix it?

[2helium]

Hello @aonez
I collected some similar case in my device. They seems from a same database.
Sample 3.pdf
Sample 4.pdf
Sample 5.pdf

[aonez]

Thanks again. This is caused by a mismatch in the image file size informed in the PDF. Those images are AES encoded and the size accounts for the AES data and its key and not for the actual image size, that in all those cases is smaller.

I'll try to properly fix this one.