As explained in my comment in the forum thread, some PDF files make icepdf enter an infinite loop when looking for the content of an inline image.

{code}
stackTrace:
java.lang.Thread.State: RUNNABLE
at java.io.BufferedInputStream.fill(BufferedInputStream.java:246)
at java.io.BufferedInputStream.read(BufferedInputStream.java:265)
- locked <0x0000000607eeed68> (a org.icepdf.core.io.BufferedMarkedInputStream)
at org.icepdf.core.io.BufferedMarkedInputStream.read(BufferedMarkedInputStream.java:50)
at org.icepdf.core.util.Parser.peek2(Parser.java:532)
at org.icepdf.core.util.content.OContentParser.parseInlineImage(OContentParser.java:1104)
at org.icepdf.core.util.content.OContentParser.parse(OContentParser.java:550)
at org.icepdf.core.pobjects.Page.init(Page.java:399)
- locked <0x0000000607db6e18> (a org.icepdf.core.pobjects.Page)
at org.icepdf.core.pobjects.Document.getPageImage(Document.java:1142)
{code}

I reproduced this with the 2 PDF files from the forum link and some test code that does

{code}
Document document = new Document();
document.setByteArray(pdf, 0, pdf.length, null);

if (document.getNumberOfPages() <= 0) {
        throw new IllegalArgumentException("No page!");
}

BufferedImage image = (BufferedImage) document.getPageImage(0,
                    GraphicsRenderingHints.SCREEN, Page.BOUNDARY_CROPBOX, 0f, 1.0f);
ImageIO.write(image, "jpg", baos);
return baos.toByteArray();
{code}