Fail to list images having more than 1 filter

[renard]

On some PDF document images can have several filters such as FlateDecode and DCTDecode.
pdfcpu skip such image with following log:

INFO: 2021/05/05 14:22:27 ExtractImage(72): skip img with more than 1 filter: FlateDecode,DCTDecode

Is there a particular reason for that? is is possible to decompress the image before applying the DCTDecode filter?

[hhrutter]

Serious support of multi filter streams need proper test cases.
I do not have any test PDFs available, that's the simple reason this has not been implemented.
Also there are a lot of possible combinations.
If you can share something we can make this work at least for the combinations we have test files for.

[renard]

I have some copyrighted material.
If you want I can share something via your private email.

Let me know.

[hhrutter]

You find my email at https://github.com/hhrutter
👍 This will help with the implementation but I also need some small files for a testcase.
Maybe there is a free PDFWriter out there that produces multifilter XObject image streams.
@petervwyatt Do you have any insights into this?

[petervwyatt]

@hhrutter I emailed you privately.

[hhrutter]

This issue is work in progress.

[hhrutter]

Fixed with v0.3.12