# HLS output

Media Blocks SDK .Net

HLS sink block can be used to create an HLS server from any video/audio source. SDK includes an optional HTTP server. Alternatively, you can use IIS, Nginx, Apache, or any other web server.

Use the HLSSinkSettings class to set the parameters.

# Block info

Name: HLSSinkBlock.

Pin direction Media type Pins count
Input audio audio/x-raw one
audio/x-ac3
audio/x-aac
audio/x-mp3
Input video video/x-raw one
video/x-h264
video/x-h265

# The sample pipeline 

graph LR;
    VirtualVideoSourceBlock-->H264EncoderBlock;
    VirtualAudioSourceBlock-->AACEncoderBlock;
    H264EncoderBlock-->HLSSinkBlock;
    AACEncoderBlock-->HLSSinkBlock;

# Sample code 

// Pipeline
var pipeline = new MediaBlocksPipeline();
pipeline.OnError += Pipeline_OnError;

// video and audio sources
var virtualVideoSource = new VirtualVideoSourceSettings
{
    Width = 1280,
    Height = 720,
    FrameRate = VideoFrameRate.FPS_25,
};

var videoSource = new VirtualVideoSourceBlock(virtualVideoSource);

var virtualAudioSource = new VirtualAudioSourceSettings
{
     Channels = 2,
     SampleRate = 44100,
};

var audioSource = new VirtualAudioSourceBlock(virtualAudioSource);

// H264/AAC encoders
var h264Settings = new OpenH264EncoderSettings();
var h264Encoder = new H264EncoderBlock(h264Settings);
var aacEncoder = new AACEncoderBlock();

pipeline.Connect(videoSource.Output, h264Encoder.Input);
pipeline.Connect(audioSource.Output, aacEncoder.Input);

// HLS sink
var settings = new HLSSinkSettings
{
    Location = Path.Combine(AppContext.BaseDirectory, "segment_%05d.ts"),
    MaxFiles = 10,
    PlaylistLength = 5,
    PlaylistLocation = Path.Combine(AppContext.BaseDirectory, "playlist.m3u8"),
    PlaylistRoot = "http://localhost:8088/",
    SendKeyframeRequests = true,
    TargetDuration = 5,
    Custom_HTTP_Server_Enabled = true,
    Custom_HTTP_Server_Port = 8088
};

var hlsSink = new HLSSinkBlock(settings);

// Connect everything
pipeline.Connect(videoSource.Output, h264Encoder.Input);
pipeline.Connect(audioSource.Output, aacEncoder.Input);

pipeline.Connect(h264Encoder.Output, hlsSink.CreateNewInput(MediaBlockPadMediaType.Video));
pipeline.Connect(aacEncoder.Output, hlsSink.CreateNewInput(MediaBlockPadMediaType.Audio));

// Start
pipeline.Start();

# Sample applications

# Platforms

Windows, macOS, Linux, iOS, Android.