String inputFile = "input.pptx";
String outputFile = "output.mp4";  

Presentation presentation = new Presentation();
presentation.loadFromFile(inputFile);

SaveToVideoOption saveOption = new SaveToVideoOption.Builder("D:\\tools\\ffmpeg-7.1.1-essentials_build\\bin")  // Set ffmpeg path
.setFps()  // Frame rate
.setThreadsCount()  // Number of threads
.setDurationForEachSlide()  // Duration for each slide
.build(); 
presentation.setSaveToVideoOption(saveOption);
presentation.saveToFile(outputFile, FileFormat.AUTO);

HtmlExportOptions options = document.getHtmlExportOptions();
options.setOfficeMathOutputMode(HtmlOfficeMathOutputMode.Math_ML);

Document.SaveToFile("output.xlsx", FileFormat.XLSX);

paragraph.Format.AdjustRightIndent = true; // Default value is true

textRange.CharacterFormat.Kerning = 2.5f;

Document document = new Document();
Section section = document.AddSection();
Spire.Doc.Documents.Paragraph paragraph = section.AddParagraph(); paragraph.Format.HorizontalAlignment = HorizontalAlignment.Center;
Spire.Doc.Fields.TextRange textRange = paragraph.AppendText("RepeatingBendingProcess");
textRange.CharacterFormat.FontSize = 28f;
textRange.CharacterFormat.FontName = "Times New Roman";
paragraph = section.AddParagraph();
paragraph = section.AddParagraph();
paragraph.Format.HorizontalAlignment = HorizontalAlignment.Center;
// Add SmartArt with "Segmented Process" layout
Spire.Doc.Fields.Shapes.Shape shape = paragraph.AppendSmartArt(SmartArtType.RepeatingBendingProcess, 432, 252);
SmartArt repeatingBendingSmartArt = shape.SmartArt;
// Add node text
SmartArtNode process1 = repeatingBendingSmartArt.Nodes[0];
process1.Text = "1";
          ((Spire.Doc.Fields.TextRange)process1.Paragraphs[0].ChildObjects[0]).CharacterFormat.FontName = "Calibri";
        ((Spire.Doc.Fields.TextRange)process1.Paragraphs[0].ChildObjects[0]).CharacterFormat.FontSize = 20f;
            ((Spire.Doc.Fields.TextRange)process1.Paragraphs[0].ChildObjects[0]).CharacterFormat.TextColor = Color.Crimson;
// Add node text
SmartArtNode process2 = repeatingBendingSmartArt.Nodes[1];
process2.Text = "2";
           ((Spire.Doc.Fields.TextRange)process2.Paragraphs[0].ChildObjects[0]).CharacterFormat.FontSize = 15f;
// Add node text   
SmartArtNode process3 = repeatingBendingSmartArt.Nodes[2];
process3.Text = "3";
            ((Spire.Doc.Fields.TextRange)process3.Paragraphs[0].ChildObjects[0]).CharacterFormat.FontSize = 10f;
// Add node text
SmartArtNode process4 = repeatingBendingSmartArt.Nodes[3];
process4.Text = "4";
            ((Spire.Doc.Fields.TextRange)process4.Paragraphs[0].ChildObjects[0]).CharacterFormat.FontSize = 10f;
// Add node text
SmartArtNode process5 = repeatingBendingSmartArt.Nodes[4];
process5.Text = "5";
            ((Spire.Doc.Fields.TextRange)process5.Paragraphs[0].ChildObjects[0]).CharacterFormat.FontSize = 10f; 
document.SaveToFile(outputFile, FileFormat.Docx); 
document.Close();

using (Document document = new Document(inputFile))
            {
                // Iterate through all sections
                foreach (Section section in document.Sections)
                {
                    if (section?.Paragraphs == null) continue;

                    // Iterate through all paragraphs in the section
                    foreach (Spire.Doc.Documents.Paragraph paragraph in section.Paragraphs)
                    {
                        foreach (var childObj in paragraph.ChildObjects)
                        {
                            if (childObj is Spire.Doc.Fields.Shapes.Shape shape && shape.HasSmartArt)
                            {
                                SmartArt smartArt = shape.SmartArt;
                                if (smartArt == null) continue;
                                TraverseSmartArtNodes(smartArt.Nodes, builder, 0);
                            }
                        }
                    }
                }
            }
public static void TraverseSmartArtNodes(SmartArtNodeCollection nodes, StringBuilder builder, int level)
        {
            if (nodes == null || nodes.Count == 0) return;

            for (int nodeIdx = 0; nodeIdx < nodes.Count; nodeIdx++)
            {
                SmartArtNode node = nodes[nodeIdx];
                if (node == null) continue;

                // Clean node text
                string nodeText = node.Text != null ? node.Text.Trim() : "Empty Text";
                if (nodeText == "\r" || string.IsNullOrEmpty(nodeText)) continue;

                // Concatenate node level identifier
                string nodePrefix;
                switch (level)
                {
                    case 0:
                        nodePrefix = "smartArt.Nodes";
                        break;
                    case 1:
                        nodePrefix = "smartArt.Nodes.ChildNodes";
                        break;
                    case 2:
                        nodePrefix = "smartArt.Nodes.ChildNodes.ChildNodes";
                        break;
                    default:
                        nodePrefix = $"smartArt.Nodes.Level{level}";
                        break;
                }
                // Basic text output
                builder.AppendLine($"{nodePrefix}_{nodeIdx}: {nodeText}");
                // Recursively process child nodes
                TraverseSmartArtNodes(node.ChildNodes, builder, level + 1);
            }
        }

doc.getFileInfo().setVersion(PdfVersion.Version_2_0);