Text overlay

Products: Video Capture SDK .Net, Media Player SDK .Net, Video Edit SDK .Net

Engines: VideoCaptureCore, MediaPlayerCore, VideoEditCore

Introduction

This example demonstrates how to overlay text on a video stream. You can set the font, size, color, position of the text, and other properties.

Sample code

Most simple text overlay with custom position:

var effect = new VideoEffectTextLogo(true, "textoverlay");

 // set position
 effect.Left = 20;
 effect.Top = 20;

 // set Font (System.Drawing.Font)
 effect.Font = new Font("Arial", 40);

 // set text
 effect.Text = "Hello, world!";

 // set text color
 effect.FontColor = Color.Yellow;

MediaPlayer1.Video_Effects_Add(effect);

Date/time and frame number modes

You can set custom modes to display the current date and time, current video time stamp, or frame number.

Use the Mode property to set the mode:

// set mode and mask
effect.Mode = TextLogoMode.DateTime;
effect.DateTimeMask = "yyyy-MM-dd. hh:mm:ss";

You can use the TimeStampMask and DateTimeMask properties to set the mask for the time and date. Frame number mode does not require any additional settings.

Fade-in and fade-out

You can set the fade-in and fade-out effects for the text overlay.

// add the fade-in
 effect.FadeIn = true; 
 effect.FadeInDuration = TimeSpan.FromMilliseconds(5000);

// add the fade-out
 effect.FadeOut = true;
 effect.FadeOutDuration = TimeSpan.FromMilliseconds(5000);

Rotate

You can rotate the text overlay by 90, 180, or 270 degrees.

// set rotation mode
effect.RotationMode = TextRotationMode.Rm90;

Flip

You can flip the text overlay horizontally, vertically, or both.

// set flip mode
effect.FlipMode = TextFlipMode.XAndY;

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Visit our GitHub page to get more code samples.