Error while converting PDF to PNG images

Aspose.Total Product Family
1

Error:

I am trying to convert PDF's pages to PNG images but getting an exception at

"pngDevice.Process(pdfDocument.Pages(pageCount), imageStream)" line with message "Parameter is not Valid".

Background:

I am Converting DOCX and DOC file to PDF and then each page of PDF to PNG images.

Fails at:

While converting some DOCX file containing headers & footers, tables especially images (copied screenshot or inserted pictures) am getting an exception.

While debugging I found out it process the pages which does not have a picture and was converted to PDF from DOCX file. The code executes fine if the original file extension is DOC before converting to PDF and then converting to PNG images.

I do pass LoadOptions object with appropriate format while loading the document into Aspose.Words.Document (not sure if it matters) object and saving it with below code:

Aspose.Words.Document document = new Aspose.Words.Document(filePath, docLoadOptions);

document.Save(tempFolder + "filename.pdf", Aspose.Words.SaveFormat.Pdf);

Where am I going wrong, or is there any limitation of converting from DOCX to PDF causing this error.



Though it is a requirement to have it converted to PDF first then to PNG images it will be nice to know how to convert each page of DOC/DOCX to PNG. I have tried document.save() method but it only converts the first page to PNG.


See attachad pdf document.

2

Manmeet:

Error:<o:p></o:p>

I am trying to convert PDF’s pages to PNG images but getting an exception at<o:p></o:p>

“pngDevice.Process(pdfDocument.Pages(pageCount), imageStream)” line with message “Parameter is not Valid”.<o:p></o:p>

Background:<o:p></o:p>

I am Converting DOCX and DOC file to PDF and then each page of PDF to PNG images.<o:p></o:p>

Fails at:<o:p></o:p>

While converting some DOCX file containing headers & footers, tables especially images (copied screenshot or inserted pictures) am getting an exception.<o:p></o:p>

While debugging I found out it process the pages which does not have a picture and was converted to PDF from DOCX file. The code executes fine if the original file extension is DOC before converting to PDF and then converting to PNG images.<o:p></o:p>

I do pass LoadOptions object with appropriate format while loading the document into Aspose.Words.Document (not sure if it matters) object and saving it with below code:<o:p></o:p>

Aspose.Words.Document document = new Aspose.Words.Document(filePath, docLoadOptions);<o:p></o:p>

document.Save(tempFolder + “filename.pdf”, Aspose.Words.SaveFormat.Pdf);<o:p></o:p>

Where am I going wrong, or is there any limitation of converting from DOCX to PDF causing this error.

Hi Manmeet,


Thanks for using our products.


I
have tested the scenario using Aspose.Pdf for .NET 7.3.0 and I am getting Out of Memory error when trying to convert PDF pages into PNG format. For the
sake of correction, I have logged it in our issue tracking system as PDFNEWNET-34305. We
will investigate this issue in details and will keep you updated on the status
of a correction.


We
apologize for your inconvenience.


Manmeet:

Though it is a requirement to have it converted to PDF first then to PNG images it will be nice to know how to convert each page of DOC/DOCX to PNG. I have tried document.save() method but it only converts the first page to PNG.

Concerning to this issue, I am moving this thread to respective forum where my fellow workers taking care of Aspose.Words for .NET would be in better position to answer this query.

3
Hi Manmeet,

Thanks for your query.

Manmeet:
Though it is a requirement to have it converted to PDF first then to PNG images it will be nice to know how to convert each page of DOC/DOCX to PNG. I have tried document.save() method but it only converts the first page to PNG.

Please use the following code snippet to convert each page of a Word document into a PNG image and read following documentation of links for your kind reference.

http://www.aspose.com/docs/display/wordsnet/ImageSaveOptions+Members

http://www.aspose.com/docs/display/wordsnet/ImageSaveOptions+Class

http://www.aspose.com/docs/display/wordsnet/Document+Features+Supported+on+Image+Export


<span lang=“EN-GB” style=“font-family:“Courier New”;color:#2B91AF;mso-ansi-language:EN-GB;
mso-no-proof:yes”>Document<span lang=“EN-GB” style=“font-family:“Courier New”;
mso-ansi-language:EN-GB;mso-no-proof:yes”> doc = new
Document(MyDir + “in.doc”);<o:p></o:p>

ImageSaveOptions options = new ImageSaveOptions(SaveFormat.Png);

options.PageCount = 1;

for (int pageIndex = 0; pageIndex < doc.PageCount; pageIndex++)

{

string outputFileName = MyDir + string.Format("{0}_{1}.png", "AsposeOut", pageIndex + 1);

options.PageIndex = pageIndex;

doc.Save(outputFileName, options);

}

Please let us know if you have any more queries.

4

The issues you have found earlier (filed as PDFNEWNET-34305) have been fixed in Aspose.Pdf for .NET 7.6.0.

This message was posted using Notification2Forum from Downloads module by aspose.notifier.
5

The issues you have found earlier (filed as ) have been fixed in this update. This message was posted using BugNotificationTool from Downloads module by MuzammilKhan