Question

当我打开使用iText示例生成的PDF文档以将视频嵌入PDF文档IText Example Code时，文档显示为空白。

有没有办法在视频播放时显示视频缩略图，因此该文档的读者会有一些线索知道其中有视频
有没有办法插入播放，暂停，停止按钮等来控制播放
视频不适用于所有环境，我只在使用Acrobat阅读器的Windows笔记本电脑上取得了成功。使用Mac和Linux，视频无法播放。此外，当在浏览器内打开PDF时，视频无法播放。是限制还是我遗失了什么？
当我打开生成的PDF并向下滚动到带有视频的页面时，我收到警告 - “禁用功能以避免安全风险” - 是否有办法以不同的方式嵌入视频以避免看到此消息？

Answer 1

根据Bruno Lowagie的建议，我使用RichMediaAnnotation编写了以下代码。但视频未显示在生成的PDF中。知道我在这里缺少什么吗？

    Document document = new Document();
    PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream("richMedia.pdf"));
    document.open();
    writer.setPdfVersion(PdfWriter.PDF_VERSION_1_7);
    writer.addDeveloperExtension(PdfDeveloperExtension.ADOBE_1_7_EXTENSIONLEVEL3);

    RichMediaAnnotation richMedia = new RichMediaAnnotation(writer, new Rectangle(10,10,150,75));

    PdfFileSpecification fs = PdfFileSpecification.fileEmbedded(writer, RESOURCE, "VideoPlayer.swf", null);

    PdfIndirectReference asset = richMedia.addAsset("VideoPlayer.swf", fs);
    RichMediaConfiguration configuration = new RichMediaConfiguration(PdfName.VIDEO);
    RichMediaInstance instance = new RichMediaInstance(PdfName.VIDEO);
    RichMediaParams vars = new RichMediaParams();
    vars.setBinding(PdfName.BACKGROUND);
    instance.setAsset(asset);


    configuration.addInstance(instance);
    PdfIndirectReference configRef = richMedia.addConfiguration(configuration);

    RichMediaActivation activation = new RichMediaActivation();
    activation.setCondition(PdfName.XA);
    RichMediaPresentation presentation = new RichMediaPresentation();
    presentation.setPassContextClick(PdfBoolean.PDFFALSE);
    presentation.setTransparent(PdfBoolean.PDFFALSE);
    presentation.setStyle(PdfName.WINDOWED);
    RichMediaWindow window = new RichMediaWindow();
    window.setHeight(240, 800, 64);
    window.setWidth(320, 800, 64);
    presentation.setWindow(window);
    presentation.setNavigationPane(PdfBoolean.PDFFALSE);
    presentation.setToolbar(PdfBoolean.PDFFALSE);
    activation.setPresentation(presentation);
    activation.setConfiguration(configRef);

    richMedia.setActivation(activation);

    PdfAnnotation richMediaAnnotation = richMedia.createAnnotation();
    writer.addAnnotation(richMediaAnnotation);

    document.close();

IText PDF Library：嵌入式视频，如何显示缩略图和播放控件

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