Video Processing

Introduction

VASTreaming's video mixer composites multiple sources into a single output stream in real time. Combine live feeds, files, images, and text overlays into a broadcast-ready output—all GPU-accelerated via OpenGL.

Input Sources

Mix any combination of the following into one output:

• Live streams from any supported protocol
• Camera and screen capture
• Server publishing points (for multi-protocol server deployments)
• MP4 files
• Static or animated images (e.g., GIF) with transparency
• Text overlays with configurable font, size, color, and style

Real-Time Controls

Add or remove sources on the fly without interrupting the output stream. Each source supports fade-in and fade-out transitions. The following properties can be adjusted per source at any time:

• Z-order (layering)
• Position and size within the output frame
• Crop, rotation, and opacity
• Brightness and contrast
• Blur filter

Multi-Resolution Output

Generate multiple output streams at different resolutions from a single composition. This enables adaptive bitrate streaming via HLS or MPEG-DASH—essential for server-side delivery to diverse client devices.

Client & Server

Use the video mixer in client applications for capture and publishing, or on the server as part of our multi-protocol streaming server. Server-side mixer can be controlled programmatically or via JSON API.

Note: The video mixer requires a GPU for hardware-accelerated rendering on both client and server.

Platforms

Available for all major platforms:

• C# / .NET: .NET 6/7/8/9/10+ (cross-platform), .NET Framework 4.5+
• Java / C++: Android Studio
• C++: Visual Studio (Windows, Linux)
• C++ / Objective-C / Swift: Xcode (macOS, iOS)

Ready to get started? Explore our demo projects on GitHub with a free 30-day demo license, or contact us for additional information.