Video Edit SDK for C# .NET — Timeline Video Editing API¶

Video Edit SDK .NET

Introduction¶

Video Edit SDK for .NET is a C# video editing library that lets you build timeline-based video editing applications. Add video and audio files to a timeline, trim segments, apply transitions and effects, overlay text and images, and render the result to MP4, AVI, MKV, WebM, or other formats — all from your .NET code.

The SDK provides two engines: VideoEditCore (Windows-only, DirectShow-based) and VideoEditCoreX (cross-platform, runs on Windows, macOS, Linux, Android, and iOS). Both engines share the same timeline model — add sources, configure output, and start editing.

Quick Start¶

1. Install NuGet Package¶

dotnet add package VisioForge.DotNet.VideoEditX

For platform-specific dependencies and UI framework setup, see the Installation Guide.

2. Minimal Video Editing Example¶

using VisioForge.Core;
using VisioForge.Core.Types.X.VideoEdit;
using VisioForge.Core.VideoEditX;

// Initialize SDK
VisioForgeX.InitSDK();

// Create editor with video preview
var editor = new VideoEditCoreX(videoView);

// Set output resolution and frame rate
editor.Output_VideoSize = new VisioForge.Core.Types.Size(1920, 1080);
editor.Output_VideoFrameRate = new VideoFrameRate(30);

// Add video files to timeline
editor.Input_AddAudioVideoFile("intro.mp4", null, null, null);
editor.Input_AddAudioVideoFile("main.mp4", null, null, null);

// Set output format
editor.Output_Format = new MP4Output("output.mp4");

// Start editing
editor.Start();

// ... when done:
editor.Stop();
editor.Dispose();
VisioForgeX.DestroySDK();

For the complete implementation guide with event handling, audio sources, image sources, and advanced timeline configuration, see the Getting Started Guide.

Common Use Cases¶

Combine Multiple Video Files¶

Merge multiple video clips into a single output file. Add files to the timeline in sequence, set the output format, and render. Supports mixing different source formats — combine MP4, AVI, and MOV files into one output.

See: Creating Videos from Multiple Sources

Trim and Cut Video Segments¶

Extract specific time ranges from video files by setting start and stop times on each source. Combine multiple segments from the same file or different files into a final edit.

See: Working with Video Segments

Add Text and Image Overlays¶

Insert text titles, captions, logos, and watermarks over video content. Position, scale, and time overlays on the timeline.

See: Text Overlay Implementation | Adding Image Overlays

Apply Transitions Between Clips¶

Add cross-dissolve, wipe, slide, fade, and 100+ SMPTE standard transitions between video segments. Control transition duration, border style, and direction.

See: Transition Effects Between Video Fragments | Transitions Reference

Create Slideshow from Images¶

Build video slideshows from JPG, PNG, BMP, and GIF images with configurable display duration per image, transitions between slides, and background music.

See: Generating Videos from Image Sequences

Add Background Music and Audio Mixing¶

Mix multiple audio tracks with video content. Control volume per track, apply audio envelope effects for fade-in/fade-out, and synchronize audio with video.

See: Audio Volume Envelope Effects | Custom Volume Control

Picture-in-Picture Composition¶

Layer multiple video sources with position and size control for picture-in-picture layouts, reaction videos, or multi-camera compositions.

See: Picture-In-Picture Effects

Supported Formats¶

Platform Support¶

Developer Documentation¶

Guides¶

• Getting Started Guide — Full implementation walkthrough with both engines
• Code Examples — Ready-to-use examples for overlays, transitions, audio, and composition
• Deployment Guide — NuGet packages, installers, and manual installation
• Transitions Reference — 100+ SMPTE wipe transition codes and properties

iOS¶

• iOS Video Editor — Building video editing apps for iPhone and iPad

Developer Resources¶

• Code Samples on GitHub
• API Reference
• Changelog
• End User License Agreement
• Licensing Information