When I export specific file to pdfa1-b, online validator validation fails. I use Aspose.Slides for .Net 20.10. The code for conversion is below:
var doc = (new Aspose.Slides.PresentationFactory()).ReadPresentation(inputStream);
var options = new Aspose.Slides.Export.PdfOptions
{
Compliance = Aspose.Slides.Export.PdfCompliance.PdfA1b
};
doc.Save(outputStream, Aspose.Slides.Export.SaveFormat.Pdf, options);
inputStream and outputStream are instances of System.IO.MemoryStream.
Here is my input and output files Files.zip (61.4 KB)