How can i show camera without connecting room on android side?

Thanks for reaching out, Gabs. I'm an AI assistant and I'm here to help. Give me a moment while I research this topic.

Preview the device camera locally no livekit publish

Thanks — I’m responding to your request to preview the device camera locally without publishing to LiveKit. LiveKit’s Android docs do not confirm a supported flow for creating and rendering a

LocalVideoTrack

outside of the Room/LocalParticipant flow. Because that LiveKit-specific approach is not documented, I recommend using a local camera preview that does not rely on LiveKit: either CameraX (recommended for most apps) or the raw WebRTC

org.webrtc

capturer/renderer. Which option do you want? I can provide a minimal, copy‑pasteable example for: • CameraX PreviewView (simple, AndroidX-native), or • WebRTC

SurfaceViewRenderer

+

Camera2Capturer

(closer to LiveKit rendering pipeline). Tell me which one and I’ll send the example. , with interactive elements

Send me the surfaceviewrender + camera2capture

Thanks — below is a minimal Kotlin example that shows a local camera preview using WebRTC's SurfaceViewRenderer + Camera2Capturer (no LiveKit). It includes Gradle deps, permissions, initialization, lifecycle handling, start/stop capture, and a simple Activity layout. Gradle 1. Add WebRTC dependency (example using Maven artifact): • In module build.gradle:

implementation 'org.webrtc:google-webrtc:1.0.32006' // replace with current version you use

AndroidManifest (permissions)

<uses-permission android:name="android.permission.CAMERA" />
<uses-permission android:name="android.permission.RECORD_AUDIO" />

Layout (res/layout/activity_main.xml)

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <org.webrtc.SurfaceViewRenderer
        android:id="@+id/surface_view"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

</FrameLayout>

Activity (Kotlin)

import android.Manifest
import android.content.pm.PackageManager
import android.os.Bundle
import androidx.activity.result.contract.ActivityResultContracts
import androidx.appcompat.app.AppCompatActivity
import androidx.core.content.ContextCompat
import org.webrtc.*

class MainActivity : AppCompatActivity() {

    private lateinit var eglBase: EglBase
    private lateinit var peerConnectionFactory: PeerConnectionFactory
    private lateinit var surfaceView: SurfaceViewRenderer
    private var videoCapturer: Camera2Capturer? = null
    private var videoSource: VideoSource? = null
    private var localVideoTrack: VideoTrack? = null

    private val requestPermissionLauncher =
        registerForActivityResult(ActivityResultContracts.RequestMultiplePermissions()) { perms ->
            val granted = perms[Manifest.permission.CAMERA] == true
            if (granted) startCamera()
        }

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        surfaceView = findViewById(R.id.surface_view)

        // Request camera permission if needed
        if (ContextCompat.checkSelfPermission(this, Manifest.permission.CAMERA)
            != PackageManager.PERMISSION_GRANTED) {
            requestPermissionLauncher.launch(arrayOf(Manifest.permission.CAMERA))
        } else {
            initWebRTCAndStart()
        }
    }

    private fun initWebRTCAndStart() {
        eglBase = EglBase.create()

        // Initialize PeerConnectionFactory
        val options = PeerConnectionFactory.InitializationOptions.builder(this)
            .createInitializationOptions()
        PeerConnectionFactory.initialize(options)

        val encoderFactory = DefaultVideoEncoderFactory(
            eglBase.eglBaseContext, /* enableIntelVp8 */true, /* enableH264HighProfile */ true)
        val decoderFactory = DefaultVideoDecoderFactory(eglBase.eglBaseContext)

        val factoryBuilder = PeerConnectionFactory.Builder()
            .setVideoEncoderFactory(encoderFactory)
            .setVideoDecoderFactory(decoderFactory)

        peerConnectionFactory = factoryBuilder.createPeerConnectionFactory()

        // Initialize SurfaceViewRenderer
        surfaceView.init(eglBase.eglBaseContext, null)
        surfaceView.setMirror(true)
        surfaceView.setEnableHardwareScaler(true)

        startCamera()
    }

    private fun startCamera() {
        // Create VideoCapturer (Camera2)
        val cameraEnumerator = Camera2Enumerator(this)
        val cameraName = cameraEnumerator.deviceNames.firstOrNull { cameraEnumerator.isFrontFacing(it) }
            ?: cameraEnumerator.deviceNames.firstOrNull()
            ?: return

        videoCapturer = Camera2Capturer(this, cameraName, object : CameraVideoCapturer.CameraEventsHandler {
            override fun onCameraError(error: String?) { /* log if needed */ }
            override fun onCameraDisconnected() {}
            override fun onCameraFreezed(error: String?) {}
            override fun onCameraOpening(cameraName: String?) {}
            override fun onFirstFrameAvailable() {}
            override fun onCameraClosed() {}
        })

        // Create VideoSource and VideoTrack
        videoSource = peerConnectionFactory.createVideoSource(false)
        videoCapturer?.initialize(
            SurfaceTextureHelper.create("CaptureThread", eglBase.eglBaseContext),
            this,
            videoSource?.capturerObserver
        )

        // Start capture: width, height, fps
        videoCapturer?.startCapture(1280, 720, 30)

        localVideoTrack = peerConnectionFactory.createVideoTrack("LOCAL_VIDEO", videoSource)
        localVideoTrack?.setEnabled(true)
        localVideoTrack?.addSink(surfaceView)
    }

    private fun stopCamera() {
        try {
            videoCapturer?.stopCapture()
        } catch (e: InterruptedException) {
            // ignore
        }
        videoCapturer?.dispose()
        videoCapturer = null

        localVideoTrack?.removeSink(surfaceView)
        localVideoTrack?.dispose()
        localVideoTrack = null

        videoSource?.dispose()
        videoSource = null
    }

    override fun onResume() {
        super.onResume()
        surfaceView.onResume()
    }

    override fun onPause() {
        super.onPause()
        surfaceView.onPause()
    }

    override fun onDestroy() {
        super.onDestroy()
        stopCamera()
        surfaceView.release()
        peerConnectionFactory.dispose()
        eglBase.release()
    }
}

Notes and tips • This code uses `Camera2Enumerator`/`Camera2Capturer` from org.webrtc. If a device lacks Camera2 support, use

Camera1Enumerator

/

Camera1Capturer

. • Ensure the WebRTC artifact version matches your project; class names/packages can vary between builds. • Keep UI lifecycle in sync with renderer (

onResume

,

onPause

,

onDestroy

) to avoid texture leaks. • You can switch cameras by creating a new capturer for the other camera name, or use capturer's

switchCamera

if available. • No LiveKit Room or publish steps are used — this is purely local preview. If you want, I can convert this into a Compose example, add a camera switch button, or provide a CameraX-based preview instead. Which would you like next? , with interactive elements

and also tell how to increase quality of video streaming. but when i am using camera2 for preview then quality is good. how to handle it?

Thanks — I’m responding to your question about improving streaming quality while using Camera2 for preview (no LiveKit publish for preview). Short answer: preview quality (what you see from Camera2Capturer) can be high, but streaming quality depends on capture resolution/framerate plus encoder bitrate, codec, and publishing settings (simulcast/dynacast). To keep preview quality high while improving upstream stream quality, tune these areas: 1. Capture settings (Camera2) • Request a higher capture resolution and framerate when you start capture (e.g., 1280x720 or 1920x1080 at 30fps). Higher capture resolution -> better source for encoding. • Let the camera use proper auto-focus, exposure, and HDR where available. • Use a SurfaceTextureHelper with the EGL context (as in your SurfaceViewRenderer example) to avoid extra scaling/format conversions. 1. Encoder / publish settings (when you do publish) • Increase the encoder bitrate to match resolution/fps. Follow the bitrate table guidance (e.g., 2.5–4 Mbps for 1080p@30fps as an example from the WebRTC bitrate guide). • Choose codec based on goals: VP9 for visual quality, H.264 if you want hardware-accelerated encoding on many devices. • Set

VideoEncoding

or publish options to specify maxBitrate and maxFramerate (use your SDK’s publish options). 1. Use simulcast / dynacast for adaptability • Enable simulcast layers so the server/subscribers can pick lower/higher layers based on bandwidth. • Enable dynacast so unused layers are disabled upstream to save bandwidth while keeping a high-quality layer available when needed. 1. Network and bitrate adaptation • Ensure network conditions allow higher bitrates; use congestion control and let the encoder adapt. If your sender bitrate is too high for available uplink, quality will be reduced by the encoder/network. • If you need constant quality, consider constraining frame rate or choosing a target bitrate that fits typical available uplink. 1. Practical checklist to improve perceived quality • Capture at native aspect ratio and resolution of the camera sensor to avoid scaling artifacts. • Start capture at desired resolution (1280x720 or 1920x1080) rather than upscaling. • Set encoder bitrate appropriate to resolution/fps. • Prefer hardware encoder when available (H.264) to reduce CPU stalls that hurt frame pacing. • Use I-frame frequency / keyframe intervals appropriate for your content (e.g., 2s) to help recover quality after packet loss. If you want, I can: • show the exact code snippet to publish a LocalVideoTrack with specific

VideoEncoding

settings in the Android SDK, or • suggest concrete bitrate values for your target resolution/fps based on the LiveKit/WebRTC bitrate guide. Which would you like next? Sources: Configuring the Client SDK for Optimal Video Quality | WebRTC Video Bitrate Guide | LiveKit, with interactive elements

show the exact code snippet to publish a LocalVideoTrack with specific

VideoEncoding

settings in the Android SDK,

Responding to your request: below is a concise Kotlin snippet showing how to create a

LocalVideoTrack

with specific

VideoEncoding

settings and publish it via the LiveKit Android SDK (assumes you already have a connected

Room

and camera permission).

import io.livekit.android.*
import io.livekit.android.room.Room
import io.livekit.android.room.track.LocalVideoTrack
import io.livekit.android.room.track.VideoEncoding
import io.livekit.android.room.track.VideoPublishOptions
import io.livekit.android.room.track.VideoCaptureOptions

suspend fun publishCameraWithEncoding(room: Room) {
    // 1) Configure capture options (request desired resolution/fps)
    val captureOptions = VideoCaptureOptions(
        resolution = VideoResolution(1280, 720), // request 720p capture
        frameRate = 30
    )

    // 2) Create a camera track (this uses the SDK's createCameraTrack helper)
    // Note: API name may vary by SDK version; example uses createCameraTrack signature with options.
    val localVideoTrack: LocalVideoTrack = LocalVideoTrack.createCameraTrack(
        context = room.context,
        captureOptions = captureOptions
    )

    // 3) Define encoding settings you want for publishing
    val encoding = VideoEncoding(
        maxBitrate = 2_500_000,   // 2.5 Mbps target bitrate for 720p@30
        maxFramerate = 30         // limit encoder framerate
        // codec can be set where supported, e.g., VideoCodec.VP9 or VideoCodec.H264 if API allows
    )

    // 4) Publish with VideoPublishOptions
    val publishOptions = VideoPublishOptions(
        encoding = encoding,
        // enableSimulcast = true, // enable if you want simulcast layers (SDK option name may vary)
        // dynacast = true          // enable dynacast if supported by your server/SDK
    )

    // 5) Publish on the local participant
    room.localParticipant.publishVideoTrack(localVideoTrack, publishOptions)
}

Notes: • Use bitrates appropriate to resolution/fps (2.5–4 Mbps is a common target for 720p–1080p). Adjust

maxBitrate

to match your uplink capacity. • Consider enabling simulcast/dynacast so subscribers can receive lower/higher layers depending on bandwidth. • Choose codec per device needs: VP9 for visual quality, H.264 when hardware-accelerated encoding is preferred. • Ensure camera and audio permissions are granted before creating the camera track and that you call this after

room.connect(...)

(the

room

must be connected). • API names/constructors can differ between SDK versions; if you see different function signatures, tell me your LiveKit Android SDK version and I’ll adapt the snippet., with interactive elements