PDF page Extents are too Small

[ghernando]

I am new to the project and would like to be able to stamp all the pages of a PDF with some text.
I was following some of the C++ examples that use ModifyPDF.
I expected the MediaBox to be the extents of the PDF page, but it seems to be very small.
The size of the sample file I have reports a MediaBox to be 2016 x 2880.
But the actual page seems to be much bigger.
I think maybe I am not correctly acquiring the page.
Could you please suggest what I might be doing wrong?

testfile.pdf
`
pdfWriter.ModifyPDF("./testfile.pdf", ePDFVersion15, "", LogConfiguration(true, true, "SimpleTextUsage.log", PDFCreationSettings(true, inEmbedFonts));

	PDFUsedFont* f = pdfWriter.GetFontForFile(
		RelativeURLToLocalPath(inTestConfiguration.mSampleFileBase,
		"TestMaterials/fonts/arial.ttf"));
	PDFParser& modifiedFileParser = pdfWriter.GetModifiedFileParser();

	for (unsigned long i = 0; i < modifiedFileParser.GetPagesCount(); ++i)
	{
		ObjectIDType PageID = modifiedFileParser.GetPageObjectID(i);
		PDFObject* page = modifiedFileParser.ParsePage(i);

		PDFModifiedPage modifiedPage(&pdfWriter, i);

		PageContentContext* contentContext = (PageContentContext*)modifiedPage.StartContentContext();
		AbstractContentContext::TextOptions opt(f, 50, AbstractContentContext::eRGB, 0xFF45DE);

		contentContext->WriteText(75, 105, "Test Text that is supercalofragolisticly long....  I mean really long to see if it goes off the page...", opt);

		PDFPageInput pageInput = PDFPageInput(&modifiedFileParser, page);
		PDFRectangle cropBox = pageInput.GetCropBox();
		PDFRectangle mediaBox = pageInput.GetMediaBox();
		contentContext->DrawRectangle(cropBox.LowerLeftX, cropBox.LowerLeftY, cropBox.UpperRightX, cropBox.UpperRightY);
		cout << mediaBox.UpperRightX - mediaBox.LowerLeftX << " " << mediaBox.UpperRightY - mediaBox.LowerLeftY << "\n";

		modifiedPage.EndContentContext();
		modifiedPage.WritePage();
	}
	status = pdfWriter.EndPDF();`

[HaerBugMaker]

Hello,I meet the same problem,Did you solve it.Looking forward to your reply,:)