'can't call method a"val" on an undefined value' error with PDF::API2

sivaramanm has asked for the wisdom of the Perl Monks concerning the following question:

hello monks

I want to convert pdf files to jpeg files

I tried as follows

use PDF::API2;
    #
    $pdf = PDF::API2->new;
    $pdf = PDF::API2->open('c:\temp.pdf');
    $page = $pdf->page;
    $page = $pdf->openpage($pagenum);
    $file = 'c:\/siva.jpeg';
    $img = $pdf->image_jpeg('siva.jpeg');
[download]

But I got an error as can't call method a"val" on an undefined value at C:\perl\site\lib\PDF\API2\Resource\XObject\Image.pm line 99

pls help me

Thanks

Siva

2006-08-07 Retitled by planetscape, as per Monastery guidelines: one-word (or module-only) titles hinder site navigation

( keep:0 edit:17 reap:0 )

Original title: 'pdf2jpeg'

Comment on 'can't call method a"val" on an undefined value' error with PDF::API2 Download Code

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Re: 'can't call method a"val" on an undefined value' error with PDF::API2 by andyford (Curate) on Aug 07, 2006 at 16:28 UTC
What happens when $pagenum is set to some number?	[reply]
Re: 'can't call method a"val" on an undefined value' error with PDF::API2 by lorn (Monk) on Aug 07, 2006 at 19:11 UTC
Do you need to do that with perl? you can do with convert, that come in ImageMagick package. Lorn -http://lornlab.org -slackwarezine.com.br	[reply]
Re: 'can't call method a"val" on an undefined value' error with PDF::API2 by McDarren (Abbot) on Aug 08, 2006 at 02:41 UTC
Hello sivaramanm, I think you are a bit confused here. Firstly, it appears to me that you have simply copied/pasted the code example from the PDF::API2 synopsis, and expected it to somehow magically do what you want. That's not going to happen :) You have `$pdf = PDF::API2->new;`, immediately followed by `$pdf = PDF::API2->open('c:\temp.pdf');`. So which is it? Are you creating a new PDF object/file, or opening an existing one? You then do `$page = $pdf->openpage($pagenum);` - that is attempting to open a page at a non-defined page number (hence the error). Finally, you have `$img = $pdf->image_jpeg('siva.jpeg');`. Now I may be wrong here (as I've not used this module before), but from a quick read of the docs I get the understanding that the image_jpeg method will create an image object from an EXISTING jpeg file. Which is probably the opposite to what you were expecting. So it appears to me that PDF::API2 may not be able to do what you want, and you may instead need to look at ImageMagik's convert, as lorn suggested.	[reply] [d/l] [select]