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Getting error when converting pdf to jpeg
Posted: Mon Feb 25, 2019 8:03 am
by Mattias
Hello
I've been using xnconvert for abit to convert pdfs to jpeg files and it's been working great but now i want to automate the process so i figured i'd have a go with nconvert but i'm not getting anywhere ..
I'm doing a simple convertion using
nconvert -o jpeg 1.pdf
but when it runs i get an error:
C:\test>nconvert -o jpeg 1.pdf
** NCONVERT v7.25 (c) 1991-2019 Pierre-E Gougelet (Jan 15 2019/12:05:55) **
Version for Windows Xp/Vista/7 x64 (All rights reserved)
** This is freeware software (for non-commercial use)
GS: (C:\Program Files\gs\gs9.26\bin\gsdll64.dll)
ARG 0 -dNODISPLAY
ARG 1 -dQUIET
ARG 2 -sPDFname=1.pdf
ARG 3 -sDSCname=C:\Users\matnil\AppData\Local\Temp\x_3EEC.tmp
ARG 4 pdf2dsc.ps
ARG 5 -c quit
ARG 6 -c quit
==> 112
ERROR: -101
GS: (C:\Program Files\gs\gs9.26\bin\gsdll64.dll)
ARG 0 -dBATCH
ARG 1 -dFirstPage=1
ARG 2 -dLastPage=1
ARG 3 -dMaxBitmap=300000000
ARG 4 -sDEVICE=tiff24nc
ARG 5 -q
ARG 6 -dNOPAUSE
ARG 7 -dSAFER
ARG 8 -dTextAlphaBits=4
ARG 9 -dGraphicsAlphaBits=4
ARG 10 -g839x593
ARG 11 -r72x72
ARG 12 -sOutputFile=C:\Users\matnil\AppData\Local\Temp\x_3F4A.tmp
ARG 13 1.pdf
ARG 14 -c quit
ARG 15 -c quit
==> 219
GS>Over...
Conversion of 1.pdf into jpeg.pdf OK
and it outputs a new file called jpeg.pdf instead of a jpeg file.
i use 64bit version of nconvert and ghostscript, any idea what i'm doing wrong here?
Re: Getting error when converting pdf to jpeg
Posted: Mon Feb 25, 2019 8:30 am
by cday
Please try:
nconvert -out jpeg -o filename.jpg 1.pdf
The
-out and
-o switches are easily confused, if the above code doesn't work I'll have a closer look later.
You may also wish to add a
-q term to set the JPEG compression level, such as
-q 80 .
Re: Getting error when converting pdf to jpeg
Posted: Mon Feb 25, 2019 10:43 am
by Mattias
oh! Well that worked fine
i got confused because when i exported the bat file from xnconvert it told me to use -o for format
this is what i got from xnconvert:
nconvert -rotate 90 -ratio -rtype lanczos -resize 650 600 -o jpeg -q 80
so i edited it to this:
nconvert -rotate 90 -ratio -rtype lanczos -resize 650 600 -out jpeg -q 80 -o 1.jpg 1.pdf
and it works fine
Many thanks
Re: Getting error when converting pdf to jpeg
Posted: Mon Feb 25, 2019 10:53 am
by cday
Mattias wrote: Mon Feb 25, 2019 10:43 am
i got confused because when i exported the bat file from xnconvert it told me to use -o for format
this is what i got from xnconvert:
nconvert -rotate 90 -ratio -rtype lanczos -resize 650 600 -o jpeg -q 80
I think you could usefully report that as a bug in the XnConvert section of the forum...
Re: Getting error when converting pdf to jpeg
Posted: Mon Feb 25, 2019 11:02 am
by Mattias
on that note i got a followup question, in xnconvert i can check convert all pages from multipage file and i figured the option for nconvert might be -multi but that does not seem to produce more then one page even though my pdf is 3 pages.
i always want to extract the last page in my automated batch job and -page works but it does not always have x amount of pages so i would need it to always only get the last page (i tried -page last but that had no effect and took the first page instead) .. is there a command to get the last page of a pdf?
Re: Getting error when converting pdf to jpeg
Posted: Mon Feb 25, 2019 11:37 am
by cday
Mattias wrote: Mon Feb 25, 2019 11:02 am
on that note i got a followup question, in xnconvert i can check convert all pages from multipage file and i figured the option for nconvert might be -multi but that does not seem to produce more then one page even though my pdf is 3 pages.
The option
-multi is for the creation of multipage files, again confusing but defined in the NConvert help file.
i always want to extract the last page in my automated batch job and -page works but it does not always have x amount of pages so i would need it to always only get the last page (i tried -page last but that had no effect and took the first page instead) .. is there a command to get the last page of a pdf?
I'm not sure, could you try that again after making the above change to your code...
Re: Getting error when converting pdf to jpeg
Posted: Mon Feb 25, 2019 12:59 pm
by Mattias
thanks, xall extracts all pages with page name in the end of the name, i guess ill have to come up with some renaming algo to get the last page only .. best way would be if there was a way to check which page number is the last page then extract only that page but this will work for now
Re: Getting error when converting pdf to jpeg
Posted: Mon Feb 25, 2019 1:07 pm
by cday
Mattias wrote: Mon Feb 25, 2019 12:59 pm
thanks, xall extracts all pages with page name in the end of the name, i guess ill have to come up with some renaming algo to get the last page only .. best way would be if there was a way to check which page number is the last page then extract only that page but this will work for now
There are ways of counting the number of files in a folder, Google if that would help...
There is also:
Code: Select all
-o filename : Output filename
Use # to specify position of numeric enumerator
...but I imagine that only affects the base filename, so probably no help.
Edit:
If you hit a problem this untested method should work:
o Extract all pages to a folder;
o Set a variable equal to the number of files in the folder, using for example one of the methods described
here ;
o Delete all of the files in the folder;
o Extract the last page using the above count variable as the page number.