Video Processing Features

Functionality

VASTreaming library provides the ability to mix multiple video, image and text sources into a single output stream in realtime. The following input sources are supported:

• Live streaming source of any supported protocol
• Video capture (where supported)
• Screen capture (where supported)
• Another publishing point (applicable for multi-protocol server only)
• MP4 file
• Static or animated (e.g. GIF) image with preserving a transparency
• Text with specified decoration, such as font type, size, color etc

User can add to or delete sources from a mixer on the fly without interrupting output video stream. Source can appear in an output video momentarily or user can choose a fade in animation for that. The same stands for disappearance - a source can disappear momentarily or via fade out animation. The following parameters can also be modified on the fly for each source independently:

• Z order
• Location of a source in an output video
• Crop
• Rotation
• Opacity
• Brightness adjustment
• Contrast adjustment
• Blur filter

The mixer supports creating a multi-resolution output stream, i.e., it creates several video streams with the same content but different resolution. This feature mostly makes sense for server applications to provide adaptive streaming via HLS or MPEG-DASH protocols.

Applications

The video mixer is available for client applications, e.g. for capture and publishing to a server. In such scenario, user controls the library via its own code.

But the mixer is also available for server applications and can be a part of our multi-protocol server. In this case, it can be controlled via a user code or via JSON API.

Although it is important to note that the video mixer utilizes OpenGL and requires GPU for proper hardware acceleration. This is true for both client and server applications.

Platforms

VASTreaming video mixer feature is available for Android, iOS, Windows, Linux, and macOS. The library exists in the following languages/frameworks:

• C# code for Xamarin (Android and iOS supported)
• C# code for .NET Framework, .NET Standard, .NET Core and .NET 5+ (Windows, Linux, and macOS supported)
• Java code for Android Studio
• C++ code for Visual Studio (Windows supported)
• C++/Objective-C code for Xcode (macOS and iOS supported)

Don't hesitate to contact us to request a demo applications and a demo projects.