Please, would it be possible to add support of output in PDF/A? Thank you very much.
By josch on 2020-04-20T05:51:21.121Z
In what way is the output of img2pdf currently not conforming to PDF/A?
By kexec on 2020-05-06T16:59:35.872Z
Well, a PDF/A document should claim that its "PDF/A-compliant" in metadata. Also when a PDF/A file is opened in Adobe Acrobat, it shows notice "The file you have opened complies with the PDF/A standard and has been opened read-only to prevent modification."
By josch on 2020-05-06T18:01:13.929Z
I would be greatful for any documentation how that is done. All I can find online are either proprietary tools or online services that want my data first. I'm not going to pay with my private money to download the ISO 19005-1:2005 document that explains how pdf/a works. You also only mention Adobe Acrobat which is another proprietary program that I'm not going to install or pay for. I'm not a company making profit out of this.
By josch on 2020-05-26T09:41:45.159Z
Until this is fixed, you can probably use the following command to turn any pdf into one that is pdf/a compliant:
This issue might fix itself when we add the new qpdf backend from !6
By josch on 2020-06-01T00:12:47.858Z
Commit 93f65a49c9 now introduces support for PDF/A-1b. All validators I could find agree that the resulting pdf with the --pdfa option are compliant. If you find a validator that claims otherwise, please tell. Implementing this convinced me even more how useless it is to output PDF/A-1b compliant files for img2pdf. It just unnecessarily increases the filesize. That's why PDF/A-1b compliant output is disabled by default and you need to pass the --pdfa flag to produce such files.
By josch on 2020-06-01T00:12:47.945Z
Status changed to closed
*By kexec on 2020-04-20T03:29:48.683Z*
Please, would it be possible to add support of output in PDF/A? Thank you very much.
---
*By josch on 2020-04-20T05:51:21.121Z*
---
In what way is the output of img2pdf currently not conforming to PDF/A?
---
*By kexec on 2020-05-06T16:59:35.872Z*
---
Well, a PDF/A document should claim that its "PDF/A-compliant" in metadata. Also when a PDF/A file is opened in Adobe Acrobat, it shows notice "The file you have opened complies with the PDF/A standard and has been opened read-only to prevent modification."
---
*By josch on 2020-05-06T18:01:13.929Z*
---
I would be greatful for any documentation how that is done. All I can find online are either proprietary tools or online services that want my data first. I'm not going to pay with my private money to download the ISO 19005-1:2005 document that explains how pdf/a works. You also only mention Adobe Acrobat which is another proprietary program that I'm not going to install or pay for. I'm not a company making profit out of this.
---
*By josch on 2020-05-26T09:41:45.159Z*
---
Until this is fixed, you can probably use the following command to turn any pdf into one that is pdf/a compliant:
gs -sDEVICE=pdfwrite -dBATCH -dNOPAUSE -dSAFER -sColorConversionStrategy=UseDeviceIndependentColor -dEmbedAllFonts=true -dPrinted=true -dPDFA -sProcessColorModel=DeviceRGB -dPDFACompatibilityPolicy=1 -dDetectDuplicateImages -r150 -dFastWebView=true -sOutputFile=output.pdf input.pdf
And the following java code uses preflight from apache pdfbox which claims to being able to check pdf/a compliance:
```
/**
* Source:
* https://pdfbox.apache.org/1.8/cookbook/pdfavalidation.html
*
* Compilation:
* $ javac -cp preflight-app.2.0.2.jar:. Validator.java
*
* Usage:
* $ java -cp preflight-app.2.0.2.jar:. Validator input.pdf
*/
import org.apache.pdfbox.preflight.ValidationResult;
import org.apache.pdfbox.preflight.parser.PreflightParser;
import org.apache.pdfbox.preflight.PreflightDocument;
import org.apache.pdfbox.preflight.exception.SyntaxValidationException;
import org.apache.pdfbox.preflight.ValidationResult.ValidationError;
public class Validator {
public static void main( String[] args ) throws Exception {
ValidationResult result = null;
PreflightParser parser = new PreflightParser(args[0]);
try {
parser.parse();
PreflightDocument document = parser.getPreflightDocument();
document.validate();
result = document.getResult();
document.close();
} catch (SyntaxValidationException e) {
result = e.getResult();
}
if( result.isValid() )
System.out.println("The file " + args[0] + " is a valid PDF/A-1b file");
else {
System.out.println("The file " + args[0] + " is not valid, error(s) :");
for( ValidationError error : result.getErrorsList() )
System.out.println(error.getErrorCode() + " : " + error.getDetails());
}
}
}
```
This issue might fix itself when we add the new qpdf backend from !6
---
*By josch on 2020-06-01T00:12:47.858Z*
---
Commit 93f65a49c9b1835235e90750af8e6f30b52c1592 now introduces support for PDF/A-1b. All validators I could find agree that the resulting pdf with the --pdfa option are compliant. If you find a validator that claims otherwise, please tell. Implementing this convinced me even more how useless it is to output PDF/A-1b compliant files for img2pdf. It just unnecessarily increases the filesize. That's why PDF/A-1b compliant output is disabled by default and you need to pass the --pdfa flag to produce such files.
---
*By josch on 2020-06-01T00:12:47.945Z*
---
Status changed to closed
By kexec on 2020-04-20T03:29:48.683Z
Please, would it be possible to add support of output in PDF/A? Thank you very much.
By josch on 2020-04-20T05:51:21.121Z
In what way is the output of img2pdf currently not conforming to PDF/A?
By kexec on 2020-05-06T16:59:35.872Z
Well, a PDF/A document should claim that its "PDF/A-compliant" in metadata. Also when a PDF/A file is opened in Adobe Acrobat, it shows notice "The file you have opened complies with the PDF/A standard and has been opened read-only to prevent modification."
By josch on 2020-05-06T18:01:13.929Z
I would be greatful for any documentation how that is done. All I can find online are either proprietary tools or online services that want my data first. I'm not going to pay with my private money to download the ISO 19005-1:2005 document that explains how pdf/a works. You also only mention Adobe Acrobat which is another proprietary program that I'm not going to install or pay for. I'm not a company making profit out of this.
By josch on 2020-05-26T09:41:45.159Z
Until this is fixed, you can probably use the following command to turn any pdf into one that is pdf/a compliant:
And the following java code uses preflight from apache pdfbox which claims to being able to check pdf/a compliance:
This issue might fix itself when we add the new qpdf backend from !6
By josch on 2020-06-01T00:12:47.858Z
Commit
93f65a49c9
now introduces support for PDF/A-1b. All validators I could find agree that the resulting pdf with the --pdfa option are compliant. If you find a validator that claims otherwise, please tell. Implementing this convinced me even more how useless it is to output PDF/A-1b compliant files for img2pdf. It just unnecessarily increases the filesize. That's why PDF/A-1b compliant output is disabled by default and you need to pass the --pdfa flag to produce such files.By josch on 2020-06-01T00:12:47.945Z
Status changed to closed