This example demonstrates how to control the camera and microphone during an active publish session: switching between front and back cameras, muting/unmuting the video track, and muting/unmuting the audio track. All three controls work while the stream is live.

What You Will Learn

• How to switch cameras with switchCamera()
• How to mute/unmute the video track with setVideoEnabled(_:)
• How to mute/unmute the audio track with setAudioEnabled(_:)
• That these methods are called on the client instance, not the builder

Prerequisites

1. Add the Red5 Pro iOS SDK (Red5WebRTCKit) to your Xcode project via Swift Package Manager.
2. Copy Config.swift into your project and fill in your server details.
3. Add NSCameraUsageDescription and NSMicrophoneUsageDescription to your Info.plist.

Key API Calls

Controls are instance methods on Red5WebrtcClient. Call them any time after startPreview() has completed.

Switch Camera (Front ↔ Back)

client?.switchCamera()

Each call toggles between the front and rear camera. The switch is seamless — the stream continues without interruption.

Mute / Unmute Video

// Mute — viewer sees a black frame or frozen frame
client?.setVideoEnabled(false)

// Unmute — live camera resumes
client?.setVideoEnabled(true)

Mute / Unmute Audio

// Mute — viewer hears silence
client?.setAudioEnabled(false)

// Unmute — microphone resumes
client?.setAudioEnabled(true)

SwiftUI Pattern

Track mute state locally and pass through to the client:

@State private var videoMuted = false
@State private var audioMuted = false

Button("Mute Video") {
    videoMuted.toggle()
    client?.setVideoEnabled(!videoMuted)
}

Button("Flip Camera") {
    client?.switchCamera()
}

Behavior Details

Source Code

The full example is available in the red5pro-ios-sdk-examples repository under 05-CameraControls/.