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Unplanned
Last Updated: 09 Feb 2023 07:59 by ADMIN
ADMIN
Deyan
Created on: 16 Nov 2016 18:09
Category: PdfProcessing
Type: Feature Request
67
PdfProcessing: Introduce API allowing to optimize and reduce the size of existing PDF files

For example, when some PDF file has uncompressed contents we may import it and apply better compression to the stream objects. Ensure that all the content inside the document is compressed.

Currently, we have the following options for PDF export optimizations:

11 comments
ADMIN
Dimitar
Posted on: 09 Feb 2023 07:59

Hi Dusty,

Thank you for your feedback. 

I believe that it would be better to open a new support ticket and attach the files that are causing the undesired behavior. In addition, add your code since there is more than one way to merge the files. This will allow us to investigate your exact case and determine if there is an issue with our product. 

Let me know if I can assist you further.

Regards,
Dimitar
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Dusty
Posted on: 08 Feb 2023 20:36
This seems like a welcome add.  I use the merge feature of PdfProcessing, and sometimes pdf's won't merge at all.  I've always assumed it's because they are too large or there's some objects embedded in them that are causing that.  But here's the thing - if I manually resave them using Microsoft Print To PDF, those PDF's will always merge.  So, you might look at whatever that MS library is doing.  Of course, I know you can do even better, because you're Telerik!
ADMIN
Martin
Posted on: 07 Jan 2021 11:25

Hello Cüneyt,

In order to reuse the embedded fonts from one of the merged documents, you can check the project with a possible workaround I attached to this feature request. I should mention the suggested workaround doesn't cover all possible cases (e.g. if there are fonts with a common name but different font sets (modified fonts or font subsets) this may lead to missing/different characters in the produced document). So in order to use this workaround, you will need to ensure the font names are unique for every different font.

If this not solves your case, I would like to ask you to provide us with the documents causing this behavior in order to deeper investigate it (for example by opening a new private support ticket)? I must assure you we treat all client files in a strictly confidential manner and for testing purposes only.

Regards,
Martin
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Paul
Posted on: 05 Jan 2021 10:19

Hi Martin,

the reuse of embedded fonts in pdf merging will be a part of the solution but cannot be the last bugfix. And it is a buggy behaviour.
We're currently evaluating the pdf library to create pdf files from html-files. We've encountered an average increase in the pdf filesize regarding to the compressed one between 1200% and 2000% !!!
We will have to implement an additional  library for compression, or switch to another library.
This ticket has been maturing from 2016 to 2021 now. When finally do you plan the compression fix?

Regards
Cüneyt

ADMIN
Martin
Posted on: 21 Dec 2020 18:34

Hi Fadi,

Thank you for the feedback. I logged a feature request on your own in our backlog to implement such consolidation of fonts: Provide a mechanism to reuse an already embedded font when merging documents with the PdfStreamWriter. You can upvote the task and subscribe to it so you can receive updates about status changes.

In appreciation for bringing this to our attention, I updated your Telerik points.

Regards,
Martin
Progress Telerik

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Fadi
Posted on: 18 Dec 2020 13:36

When merging a 400kb pdf 100 times, the result is 40MB, using a different component the result is 1.4MB.

Seems the embedded fonts are getting embedded repeatedly instead of being consolidated.

ADMIN
Martin
Posted on: 17 Sep 2020 10:06

Hi Neil,

Thank you for the feedback. We will take it into consideration when the development of this feature begins. Meanwhile, make sure you cast your vote for the implementation as well as subscribe to the task by clicking the Follow button.

 I apologize for the inconvenience this missing functionality might be causing you. 

Regards,
Martin
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Neil N
Posted on: 16 Sep 2020 19:45
Doubling the size of a PDF when a few form fields are filled out is pretty bad.
ADMIN
Tanya
Posted on: 08 Mar 2018 09:23 
Thank you for the feedback. Make sure to cast your vote for the implementation of the item and continue following it so you can get a notification about status changes on it.
Chris
Posted on: 01 Mar 2018 23:50 
Would be very interested in this.  Any PDF Processing implementation should have the ability to compress and optimize, especially when needing to send it to a web service.
Nick
Posted on: 19 Aug 2017 11:29 
This would be a good feature.
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