janus-simple-videoroom-client

Built on top of janus.js, this thin client library provides a simple high-level API that makes it easy to work with the Janus VideoRoom plugin.

Install

npm install janus-simple-videoroom-client

Usage

import { createVideoRoomClient } from "janus-simple-videoroom-client"

async function joinRoom(server, roomId, displayName) {
    const client = await createVideoRoomClient()
    const session = await client.createSession(server)
    const room = await session.joinRoom(roomId)

    const pub = await room.publish({display: displayName})
    pub.onTrackAdded(track => showVideo(track))
    pub.onTrackRemoved(track => hideVideo(track))

    const subs = {}
    room.onPublisherAdded(publishers => publishers.forEach(subscribe))
    room.onPublisherRemoved(unsubscribe)


    async function subscribe(publisher) {
        subs[publisher.id] = await room.subscribe([{feed: publisher.id}])
        subs[publisher.id].onTrackAdded(track => showVideo(track))
        subs[publisher.id].onTrackRemoved(track => hideVideo(track))
    }
    async function unsubscribe(publisherId) {
        await subs[publisherId].unsubscribe()
    }
}

Example

Check out the example.

API

VideoRoomClient

Property	Description
createSession(server, options)	Create a new VideoRoom session

VideoRoomSession

Property	Description
isValid()	Return whether the session is connected and valid
joinRoom(roomId)	Joins a room, returns a VideoRoom object
watch(mountpointId, options)	Subscribe to a streaming mountpoint, return a StreamingSubscriber object
attachToPlugin()	Attach to the VideoRoom plugin without joining a room, returns a JanusPluginHandleEx object
destroy()	Destroy the session

VideoRoom

Property	Description
pluginHandle	The JanusPluginHandleEx object associated with this room
onPublisherAdded(callback)	Register a callback for when a publisher publishes media to the room
onPublisherRemoved(callback)	Register a callback for when a publisher unpublishes
publish(options)	Publish my webcam and return a VideoRoomPublisher object
subscribe(streams, options)	Subscribe to the specified streams and return a VideoRoomSubscriber object
leave()	Leave the room

VideoRoomPublisher

Property	Description
publisherId
onTrackAdded(callback)	Register a callback for when a local MediaStreamTrack is available to display
onTrackRemoved(callback)	Register a callback for when a local MediaStreamTrack terminates
configure(options)	Modify publisher properties
restart(options)	Trigger an ICE restart
unpublish()	Stop publishing

VideoRoomSubscriber

Property	Description
pluginHandle	The JanusPluginHandleEx object associated with this subscriber
onTrackAdded(callback)	Register a callback for when a remote MediaStreamTrack is available to display
onTrackRemoved(callback)	Register a callback for when a remote MediaStreamTrack terminates
addStreams(streams)	Add additional streams to this (multi-stream) subscriber
removeStreams(streams)	Remove streams from this subscriber
pause()	Pause media delivery for this subscriber
resume()	Resume media delivery
configure(options)	Modify subscription properties
restart(options)	Trigger an ICE restart
unsubscribe()	Stop subscribing

JanusPluginHandleEx

This object is the Janus plugin handle, but augmented with these convenient methods:

Property	Description
eventTarget	Used to listen for events on the handle (e.g. consentDialog, webrtcState, slowLink, etc.)
sendRequest(message)	Send a synchronous request to the plugin
sendAsyncRequest(message, jsep?, expectResponse)	Send an asynchronous request to the plugin (expectResponse is a function that will be passed a response and must return a boolean indicating whether it matches the request, e.g. a {"request":"start"} will expect a response like {"videoroom":"event","started":"ok"})