//// This code is part of Document Solutions for PDF .NET demos.// Copyright (c) MESCIUS inc. All rights reserved.//using System;using System.IO;using System.Drawing;using GrapeCity.Documents.Pdf;using GrapeCity.Documents.Pdf.Annotations;using System.Linq;
namespace DsPdfWeb.Demos.Basics{    // This demo shows how to replace an image in a PDF with a video clip.    public class InsertVideo    {        public int CreatePDF(Stream stream)        {            var pdfPath = Path.Combine("Resources", "PDFs", "Wetlands.pdf");            var videoPath = Path.Combine("Resources", "Video", "waterfall.mp4");
            using var fs = File.OpenRead(pdfPath);            var doc = new GcPdfDocument();            doc.Load(fs);            var page = doc.Pages.First();
            // Find the largest image on the first page:            RectangleF imageRect = RectangleF.Empty;            foreach (var img in page.GetImages())            {                foreach (var l in img.Locations.Where(l_ => l_.Page.Index == 0))                {                    var r = l.PageBounds.ToRect();                    if (r.Height > imageRect.Height)                        imageRect = r;                }            }            if (imageRect == RectangleF.Empty)                throw new Exception("Could not find an image on the first page.");
            // Remove it:            doc.Redact(new RedactAnnotation() { Page = page, Rect = imageRect });
            // Add a video clip in the rectangle previously occupied by the image:            var rma = new RichMediaAnnotation();            var videoEfs = EmbeddedFileStream.FromFile(doc, videoPath);            var videoFileSpec = FileSpecification.FromEmbeddedStream(Path.GetFileName(videoPath), videoEfs);            rma.SetVideo(videoFileSpec);            rma.PresentationStyle = RichMediaAnnotationPresentationStyle.Embedded;            rma.ActivationCondition = RichMediaAnnotationActivation.PageBecomesVisible;            rma.DeactivationCondition = RichMediaAnnotationDeactivation.PageBecomesInvisible;            rma.ShowNavigationPane = true;            rma.Page = page;            rma.Rect = imageRect;
            // Done:            doc.Save(stream);            return doc.Pages.Count;        }    }}