Null renderer

The null renderer block sends the data to null. This block may be required if your block has outputs you do not want to use.

Block info

Name: NullRendererBlock.

Pin direction	Media type	Pins count
Input	Any	1

The sample pipeline

The sample pipeline is shown below. It reads a file and sends the video data to the video samples grabber, where you can grab each video frame after decoding. The Null renderer block is used to end the pipeline.

Sample code

private void Start()
{
  // create the pipeline
  var pipeline = new MediaBlocksPipeline();

  // create universal source block
  var filename = "test.mp4";
  var fileSource = new UniversalSourceBlock(await UniversalSourceSettings.CreateAsync(new Uri(filename)));

  // create video sample grabber block and add the event handler
  var sampleGrabber = new VideoSampleGrabberBlock();
  sampleGrabber.OnVideoFrameBuffer += sampleGrabber_OnVideoFrameBuffer;

  // create null renderer block
  var nullRenderer = new NullRendererBlock();

  // connect blocks
  pipeline.Connect(fileSource.VideoOutput, sampleGrabber.Input);        
  pipeline.Connect(sampleGrabber.Output, nullRenderer.Input);   

  // start the pipeline
  await pipeline.StartAsync();
}

private void sampleGrabber_OnVideoFrameBuffer(object sender, VideoFrameXBufferEventArgs e)
{
    // received new video frame
}

Platforms

Windows, macOS, Linux, iOS, Android.