• Importing documents: troubleshooting

Our import settings work well in almost all cases, but with complex PDFs, there may be differences between your flipbook and the PDF. Whatever problem you are experiencing, we always recommend installing the latest version of FlippingBook Publisher. We constantly improve the quality of our conversion engine and have solved many such issues over the years.


Below you can find the issues that you can come across and possible solutions to them.

 

The text in my publication is blurry

The text in your flipbook ought to be just as sharp as the text in your PDF (when looked at using a comparable zoom level of course!). If this is not the case, then there could be two reasons:

  1. The text in your PDF is encoded in images, not as real text.
    We handle images differently than text. The conversion settings for images are not optimal for text and will make the text look blurry. To check if your PDF uses images, open your PDF in Adobe Reader, and try to select the text. You should be able to perform actions like highlight, strikethrough, and copy/paste to a text editor. If you cannot do this, then your text is not real text but part of an image.
    The best advice that we can give you is to ask the designer of the PDF to create a copy with real text. If this is not possible, then you could try the solution in the second point below. It will probably improve the quality a bit, but since your text is not real text, your users cannot find it when using the search function, and it cannot be indexed by search engines like Google.

  2. The text is not converted properly by FlippingBook Publisher.
    It very rarely happens that your PDF contains real text, but FlippingBook Publisher doesn’t recognize it as such. In this case, you can try the following steps to correct it:
    • Go to the Pages tab.
    • Select the page with the blurry text. (If multiple pages are affected, keep the Ctrl-key pressed down to select them. You can also press Ctrl+A to select all pages)
    • Right-click on a selected page and then select Import > Reconvert pages.
    • Click on the small cogwheel button.
    • Change the Substrates format to PNG, and disable (!!!) the options Extract text layer and Improve image quality.

    • Press OK and Start.

Hopefully, this improved the quality, but whether it did or not, please send us the PDF so we can use it to further improve our conversion algorithm! 

 


I see small white lines in my images in the publication.

If you see small white lines in your publications, like in the magnified screenshot below, then this is most likely due to the PDF version that you use.

The PDF format has gone through several versions, and older versions did not support functions like transparency and layers. If you use these functions in your design-software and then generate the PDF using a PDF-version that doesn’t support these functions, then the images will get 'sliced up'.  If you inspect the PDF in detail, you will also notice these white lines. During the conversion to a FlippingBook, the effect gets more pronounced.

To correct this, try to generate the PDF again in the software where you designed it, and then export it in PDF 1.6 (Acrobat 7.0 format). As a bare minimum, you should use PDF 1.4 (Acrobat 5.0) format.

 

 

Low quality of text in Edge/Internet Explorer when zoomed in

Some types of PDFs don’t look great when you open the flipbook version in Microsoft Edge or Internet Explorer and then zoom in.

This is often easily repaired by using the Best Quality conversion profile. To reconvert an existing document with this profile:

  1. Go to the Pages tab.
  2. Select any page. Now press Ctrl+A.  This should select all pages, outlining them with a blue border.
  3. Right-click then select Import > Reconvert pages.
  4. In the drop-down menu under Conversion Profile choose Best Quality.

  1. Press Start.

If you need to apply this fix, then most likely it will affect most of your PDFs. In this case, we advise you to use this import profile as your default profile for future documents:

  1. In the menu bar, go to Edit > Preferences.
  2. Go to the Import tab.
  3. Change the Default PDF Profile to Best Quality.
  4. Press OK.

 

Some elements in my publication differ from the original PDF

If you have other problems than the ones mentioned above (like text appearing with a different font, size or in a different position, or objects being in different colors than in your PDF), then the first thing to do is to check that you use the most recent version of FlippingBook Publisher. 


If you have the most recent version of FlippingBook Publisher, but still have visual glitches, you can send us the PDF and we will be glad to fix it for you. You can forward your troublesome PDF to us using a file transfer service like wetransfer.com and email it to support@flippingbook.com.


Should you want to fix this yourself and you have Adobe Acrobat (the full version, not the Adobe Reader), then you can try to distill your PDF. Distilling removes internal inconsistencies that often cause differences between the PDF and the flipbook. This is done as follows:

  1. Open the PDF in Adobe Acrobat Pro and click on File > Save As > Other > PostScript.
  2. Choose a new name for your output file.
  3. After the PostScript file is generated, double click on it. That will open Adobe Distiller, which generates a new PDF file.
  4. Make sure that High Quality Print is chosen in the Default Settings field.

  1. Wait until the progress bar shows that conversion is completed and then try to import the generated PDF in FlippingBook. 

An unfortunate side effect of Adobe Distiller is that it removes links and bookmarks from your PDF. If your PDF contained those, then you can reinstate them as follows:

  1. Open the original PDF file in Acrobat
  2. Select the Organize Pages tool.
  3. Select all of the pages by pressing Ctrl+A
  4. Right-click and select the option Replace pages...
  5. Choose the distilled version of the PDF file as a source.
  6. Wait until the process is completed and save the file.

FlippingBook Publisher is hanging during import 

Sometimes a PDF, even a small one, can take very long to convert. Our first advice in situations like these is to just let it run. In most cases, it will eventually finish and you can enjoy your flipbook. Should it really not finish, then please send us the PDF so we can have a look.


The most common reason for this is that the PDF contains pictures that consist of thousands of objects. Typically these are engineering schemes, floorplans, or similar design pictures, that can be created in AutoCAD, Illustrator, Visio, or similar tools. This level of detail is probably very important when you actually build those conveyor belts, houses, or whatever the diagrams represent, but for creating a FlippingBook they are massive overkill. Below you can see a tiny part of the picture in the PDF on the left, and 12x zoomed in Adobe Acrobat. Look at the massive amount of objects here!  


​ ​​

All the blue boxes are individual objects - and this is just the tiny part of the image. All these objects - and as you can see there are tens of thousands of them - have to be processed by our conversion software. 


If you want to avoid such long conversions in the future, we’d suggest asking the designer of the PDF to not use a native export from AutoCAD (or whatever software they use) but just create a high-quality PNG image. That contains all the detail that you ever need (you can't zoom in to this level anyway in FlippingBook) and is converted in seconds.​

Was this article helpful?
drift chat