HaishinKit for iOS, macOS, tvOS, visionOS and Android.

Camera and Microphone streaming library via RTMP and SRT for iOS, macOS, tvOS and visionOS.
README.md contains unreleased content, which can be tested on the main branch.
API Documentation

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💬 Communication

If you need help with making LiveStreaming requests using HaishinKit, use a GitHub Discussions with Q&A.
If you'd like to discuss a feature request, use a GitHub Discussions with Idea
If you met a HaishinKit's bug🐛, use a GitHub Issue with Bug report template
- The trace level log is very useful. Please set LBLogger.with(HaishinKitIdentifier).level = .trace.
- If you don't use an issue template. I will immediately close the your issue without a comment.
If you want to contribute, submit a pull request with a pr template.
If you want to support e-mail based communication without GitHub.
- Consulting fee is $50/1 incident. I'm able to response a few days.
Discord chatroom.
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💖 Sponsors

🌏 Related projects

Project name	Notes	License
HaishinKit for Android.	Camera and Microphone streaming library via RTMP for Android.	BSD 3-Clause "New" or "Revised" License
HaishinKit for Flutter.	Camera and Microphone streaming library via RTMP for Flutter.	BSD 3-Clause "New" or "Revised" License

🎨 Features

RTMP

SRT(beta)

Multi Camera

Supports two camera video sources. A picture-in-picture display that shows the image of the secondary camera of the primary camera. Supports camera split display that displays horizontally and vertically.

Picture-In-Picture	Split

// If you want to use the multi-camera feature, please make sure stream.isMultiCamSessionEnabled = true. Before attachCamera or attachAudio.
stream.isMultiCamSessionEnabled = true

let back = AVCaptureDevice.default(.builtInWideAngleCamera, for: .video, position: .back)
stream.attachCamera(back, track: 0) { _, error in
  if let error {
    logger.warn(error)
  }
}

let front = AVCaptureDevice.default(.builtInWideAngleCamera, for: .video, position: .front)
stream.attachCamera(front, track: 1) { videoUnit, error in
  videoUnit?.isVideoMirrored = true
  if let error {
    logger.error(error)
  }
}

Rendering

Features	PiPHKView	MTHKView
Engine	AVSampleBufferDisplayLayer	Metal
Publish	✔	✔
Playback	✔	✔
VisualEffect	✔	✔
MultiCamera	✔	✔
PictureInPicture	✔

Others

tvOS 17.0 for AVCaptureSession.
Support multitasking camera access.
Support "Allow app extension API only" option

🐾 Examples

Examples project are available for iOS with UIKit, iOS with SwiftUI, macOS and tvOS. Example macOS requires Apple Silicon mac.

Camera and microphone publish.
Playback

git clone https://github.com/shogo4405/HaishinKit.swift.git
cd HaishinKit.swift
carthage bootstrap --platform iOS,macOS,tvOS --use-xcframeworks
open HaishinKit.xcodeproj

🌏 Requirements

Development

Version	Xcode	Swift
1.8.0+	15.3+	5.9+
1.7.0+	15.0+	5.9+
1.6.0+	15.0+	5.8+

OS

-	iOS	tvOS	macOS	visionOS	watchOS
HaishinKit	13.0+	13.0+	10.15+	1.0+	-
SRTHaishinKit	13.0+	-	13.0+	-	-

Cocoa Keys

Please contains Info.plist.

iOS 10.0+

NSMicrophoneUsageDescription
NSCameraUsageDescription

macOS 10.14+

NSMicrophoneUsageDescription
NSCameraUsageDescription

tvOS 17.0+

NSMicrophoneUsageDescription
NSCameraUsageDescription

🔧 Installation

HaishinKit has a multi-module configuration. If you want to use the SRT protocol, please use SRTHaishinKit. SRTHaishinKit supports SPM only.

	HaishinKit	SRTHaishinKit
SPM	https://github.com/shogo4405/HaishinKit.swift	https://github.com/shogo4405/HaishinKit.swift
CocoaPods	source 'https://github.com/CocoaPods/Specs.git' use_frameworks! def import_pods pod 'HaishinKit', '~> 1.6.0 end target 'Your Target' do platform :ios, '12.0' import_pods end	Not supported.
Carthage	github "shogo4405/HaishinKit.swift" ~> 1.6.0	Not supported.

🔧 Prerequisites

Make sure you setup and activate your AVAudioSession iOS.

import AVFoundation
let session = AVAudioSession.sharedInstance()
do {
    try session.setCategory(.playAndRecord, mode: .default, options: [.defaultToSpeaker, .allowBluetooth])
    try session.setActive(true)
} catch {
    print(error)
}

📓 RTMP Usage

Ingest

let connection = RTMPConnection()
let stream = RTMPStream(connection: connection)

stream.attachAudio(AVCaptureDevice.default(for: .audio)) { _, error in
  if let error {
    logger.warn(error)
  }
}

stream.attachCamera(AVCaptureDevice.default(.builtInWideAngleCamera, for: .video, position: .back), track: 0) { _, error in
  if let error {
    logger.warn(error)
  }
}

let hkView = MTHKView(frame: view.bounds)
hkView.videoGravity = AVLayerVideoGravity.resizeAspectFill
hkView.attachStream(stream)

// add ViewController#view
view.addSubview(hkView)

connection.connect("rtmp://localhost/appName/instanceName")
stream.publish("streamName")

Playback

let connection = RTMPConnection()
let stream = RTMPStream(connection: connection)

let hkView = MTHKView(frame: view.bounds)
hkView.videoGravity = AVLayerVideoGravity.resizeAspectFill
hkView.attachStream(stream)

// add ViewController#view
view.addSubview(hkView)

connection.connect("rtmp://localhost/appName/instanceName")
stream.play("streamName")

Authentication

var connection = RTMPConnection()
connection.connect("rtmp://username:password@localhost/appName/instanceName")

📓 SRT Usage

Ingest

let connection = SRTConnection()
let stream = SRTStream(connection: connection)
stream.attachAudio(AVCaptureDevice.default(for: .audio)) { error in
    // print(error)
}
stream.attachCamera(AVCaptureDevice.default(.builtInWideAngleCamera, for: .video, position: .back), track: 0) { _, error in
  if let error {
    logger.warn(error)
  }
}

let hkView = HKView(frame: view.bounds)
hkView.videoGravity = AVLayerVideoGravity.resizeAspectFill
hkView.attachStream(rtmpStream)

// add ViewController#view
view.addSubview(hkView)

connection.connect("srt://host:port?option=foo")
stream.publish()

Playback

let connection = SRTConnection()
let stream = SRTStream(connection: connection)

let hkView = MTHKView(frame: view.bounds)
hkView.videoGravity = AVLayerVideoGravity.resizeAspectFill
hkView.attachStream(rtmpStream)

// add ViewController#view
view.addSubview(hkView)

connection.connect("srt://host:port?option=foo")
stream.play()

📓 Settings

📹 AVCaptureSession

stream.frameRate = 30
stream.sessionPreset = AVCaptureSession.Preset.medium

// Do not call beginConfiguration() and commitConfiguration() internally within the scope of the method, as they are called internally.
stream.configuration { session in
  session.automaticallyConfiguresApplicationAudioSession = true
}

🔊 Audio

Capture

Specifies the capture capture settings.

let front = AVCaptureDevice.default(for: .audio)
stream.attachAudio(front, track: 0) { audioUnit, error in
}

AudioMixerSettings

If you want to mix multiple audio tracks, please enable the Feature flag.

FeatureUtil.setEnabled(for: .multiTrackAudioMixing, isEnabled: true)

When you specify the sampling rate, it will perform resampling. Additionally, in the case of multiple channels, downsampling can be applied.

// Setting the value to 0 will be the same as the value specified in mainTrack.
stream.audioMixerSettings = IOAudioMixerSettings(
  sampleRate: Float64 = 44100,
  channels: UInt32 = 0,
)

stream.audioMixerSettings.isMuted = false
stream.audioMixerSettings.mainTrack = 0
stream.audioMixerSettings.tracks = [
  0: .init(
    isMuted: Bool = false,
    downmix: Bool = true,
    channelMap: [Int]? = nil
  )
]

AudioCodecSettings

/// Specifies the bitRate of audio output.
stream.audioSettings.bitrate = 64 * 1000
/// Specifies the mixes the channels or not. Currently, it supports input sources with 4, 5, 6, and 8 channels.
stream.audioSettings.downmix = true
/// Specifies the map of the output to input channels.
 stream.audioSettings.channelMap: [Int]? = nil

🎥 Video

Capture

Specifies the video capture settings.

let front = AVCaptureDevice.default(.builtInWideAngleCamera, for: .video, position: .front)
stream.attachCamera(front, track: 0) { videoUnit, error in
  videoUnit?.isVideoMirrored = true
  videoUnit?.preferredVideoStabilizationMode = .standard
  videoUnit?.colorFormat = kCVPixelFormatType_420YpCbCr8BiPlanarVideoRange
}

VideoMixerSettings

stream.videoMixerSettings = IOVideoMixerSettings(
  mode: .pip,
  cornerRadius: 16.0,
  regionOfInterest: .init(
    origin: CGPoint(x: 16, y: 16),
    size: .init(width: 160, height: 160)
  ),
  direction: .east
)

VideoCodecSettings

stream.videoSettings = .init(
  videoSize: .init(width: 854, height: 480),
  profileLevel: kVTProfileLevel_H264_Baseline_3_1 as String,
  bitRate: 640 * 1000,
  maxKeyFrameIntervalDuration: 2,
  scalingMode: .trim,
  bitRateMode: .average,
  allowFrameReordering: nil,
  isHardwareEncoderEnabled: true
)

⏺️ Recording

Internally, I am now handling data with more than 3 channels. If you encounter audio issues with IOStreamRecorder, it is recommended to set it back to a maximum of 2 channels when saving locally.

let channels = max(stream.audioInputFormats[0].channels ?? 1, 2)
stream.audioMixerSettings = .init(sampleRate: 0, channels: channels)

// Specifies the recording settings. 0" means the same of input.
var recorder = IOStreamRecorder()
stream.addObserver(recorder)

recorder.settings = [
  AVMediaType.audio: [
    AVFormatIDKey: Int(kAudioFormatMPEG4AAC),
    AVSampleRateKey: 0,
    AVNumberOfChannelsKey: 0,
    // AVEncoderBitRateKey: 128000,
  ],
  AVMediaType.video: [
    AVVideoCodecKey: AVVideoCodecH264,
    AVVideoHeightKey: 0,
    AVVideoWidthKey: 0,
    /*
    AVVideoCompressionPropertiesKey: [
      AVVideoMaxKeyFrameIntervalDurationKey: 2,
      AVVideoProfileLevelKey: AVVideoProfileLevelH264Baseline30,
      AVVideoAverageBitRateKey: 512000
    ]
    */
  ]
]

recorder.startRunning()
// recorder.stopRunning()

📜 License

BSD-3-Clause

kansonkong/HaishinKit.swift

HaishinKit for iOS, macOS, tvOS, visionOS and Android.

💬 Communication

💖 Sponsors

🌏 Related projects

🎨 Features

RTMP

SRT(beta)

Multi Camera

Rendering

Others

🐾 Examples

🌏 Requirements

Development

OS

Cocoa Keys

🔧 Installation

🔧 Prerequisites

📓 RTMP Usage

Ingest

Playback

Authentication

📓 SRT Usage

Ingest

Playback

📓 Settings

📹 AVCaptureSession

🔊 Audio

Capture

AudioMixerSettings

AudioCodecSettings

🎥 Video

Capture

VideoMixerSettings

VideoCodecSettings

⏺️ Recording

📜 License