Multipage PDF to PNG sometimes shows incomplete image

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Anja
Posts: 3
Joined: Tue Aug 08, 2017 1:03 pm

Multipage PDF to PNG sometimes shows incomplete image

Postby Anja » Tue Aug 08, 2017 1:56 pm

Hi,
I seem to run in to an issue when converting a pdf file that has pages in both portrait and landscape orientation. All pages are converted as portrait, so some pages are cut off.
This is the command i usually use:
nconvert -dpi 300 -out png -merge_alpha -o outputpath\out.png -xall

Is there a way to get the orientation right for each page?

Thanks in advance

cday
XnThusiast
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Joined: Sun Apr 29, 2012 9:45 am
Location: Cheltenham, U.K.

Re: Multipage PDF to PNG maintaining mixed page orientation

Postby cday » Tue Aug 08, 2017 3:11 pm

Anja wrote:I seem to run in to an issue when converting a pdf file that has pages in both portrait and landscape orientation. All pages are converted as portrait, so some pages are cut off.
This is the command i usually use:

Code: Select all

nconvert  -dpi 300 -out png -merge_alpha -o outputpath\out.png -xall

Is there a way to get the orientation right for each page?

I don't have a problem using this code with the attached test file I created:

Code: Select all

nconvert -dpi 300 -out png -merge_alpha -o test.png -xall *.pdf

Can you upload a file that has the problem (2MiB maximum the current forum limit)?


PDF_Mixed_Orientation.pdf
(4.47 KiB) Downloaded 3 times

cday
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Joined: Sun Apr 29, 2012 9:45 am
Location: Cheltenham, U.K.

Re: Multipage PDF to PNG maintaining page orientations

Postby cday » Wed Aug 09, 2017 7:54 am

Further:

Which version of NConvert are you using, and which version of Ghostscript do you have installed?

NConvert 32-bit requires Ghostscript 32-bit installed (even on 64-bit operating systems...).

Nconvert 64-bit requires Ghostscript 64-bit installed.

I have a vague recollection of a report of a possibly similar problem to the one you describe several years ago, when the wrong version of Ghostscript was installed... :?:

Anja
Posts: 3
Joined: Tue Aug 08, 2017 1:03 pm

Re: Multipage PDF to PNG maintaining page orientations

Postby Anja » Wed Aug 09, 2017 8:29 am

https://send.firefox.com/download/f4875 ... 6V1s7Wx3MA

The file I have an issue with is just over the limit, I hope you can get it here.

I'm using the 32 bit version (v2.36) with Ghostscript 32 bit

cday
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Location: Cheltenham, U.K.

Re: Multipage PDF to PNG maintaining page orientations

Postby cday » Wed Aug 09, 2017 8:50 am

I can reproduce, your file opens normally in Adobe Acrobat, but when the pages are extracted using an NConvert script, only the left-half of landscape orientation pages is displayed...

Googling the GS error displayed for some pages "ERROR: -101" produces this hit:

[gs-bugs] [Bug 695848] New: Ghostscript decode error when opening PDF

You might like to Google the error code yourself, as the above bug report was only tentative.

I may be able to have another look later in the day, but if anyone has a solution it will probably be XnTriq much later today... :wink:

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XnTriq
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Re: Multipage PDF to PNG maintaining page orientations

Postby XnTriq » Tue Aug 15, 2017 9:45 pm

cday wrote:I have a vague recollection of a report of a possibly similar problem to the one you describe several years ago, when the wrong version of Ghostscript was installed... :?:

I've found quite a few topics discussing the issue, …


… but as far ar I can tell, there's no solution.


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