import org.apache.poi.ooxml.POIXMLDocumentPart;

import org.apache.poi.openxml4j.opc.PackagePart;

import org.openxmlformats.schemas.presentationml.x2006.main.CTExtension;

import org.w3c.dom.Node;

import org.w3c.dom.NodeList;

    @Test

    public void testReadVideo() throws Exception {

        XMLSlideShow slideShow = XSLFTestDataSamples.openSampleDocument("video.pptx");

        assertEquals(1, slideShow.getSlides().size());

        XSLFSlide slide = slideShow.getSlides().get(0);

        assertEquals(1, slide.getShapes().size());

        XSLFPictureShape picture = (XSLFPictureShape)(slide.getShapes().get(0));

        CTPicture xPicture = (CTPicture)(picture.getXmlObject());

        boolean isVideo = xPicture.getNvPicPr().getNvPr().isSetVideoFile();

        assertTrue(isVideo);

        String videoLink = xPicture.getNvPicPr().getNvPr().getVideoFile().getLink();

        assertEquals("rId2", videoLink);

        List<CTExtension> extList = xPicture.getNvPicPr().getNvPr().getExtLst().getExtList();

        assertEquals(1, extList.size());

        // https://msdn.microsoft.com/en-us/library/dd950140(v=office.12).aspx

        String mediaExt = "{DAA4B4D4-6D71-4841-9C94-3DE7FCFB9230}";

        CTExtension extension = extList.get(0);

        NodeList nodes = extension.getDomNode().getChildNodes();

        assertEquals(mediaExt, extension.getUri());

        String extVideoLink = null;

        for (int i = 0; i < nodes.getLength(); i++) {

            Node node = nodes.item(i);

            if (node.getNodeType() == Node.ELEMENT_NODE) {

                Node embed = node.getAttributes().getNamedItem("r:embed");

                if (embed != null) {

                    extVideoLink = embed.getNodeValue();

                }

            }

        }

        assertEquals("rId1", extVideoLink);

        POIXMLDocumentPart movie = slide.getRelationById(videoLink);

        POIXMLDocumentPart movieExt = slide.getRelationById(extVideoLink);

        assertNotNull(movie);

        assertNotNull(movieExt);

        PackagePart moviePackage = movie.getPackagePart();

        PackagePart moviePackageExt = movieExt.getPackagePart();

        assertEquals("/ppt/media/media1.mov", moviePackage.getPartName().getName());

        assertEquals("video/quicktime", moviePackage.getContentType());

        assertEquals("/ppt/media/media1.mov", moviePackageExt.getPartName().getName());

        assertEquals("video/quicktime", moviePackageExt.getContentType());

        byte[] movieBytes = IOUtils.toByteArray(moviePackage.getInputStream());

        assertEquals(463494, movieBytes.length);

    }