subscribeSwitch

WebRTC Subscriber Switch

Through WebRTC, the current subscriber's stream may be switched to another live stream. This example demonstrates.

This example is based on the subscriber example. See that example's README for details on subscribing. Like the subscriber example, this example assumes there is a live stream by default named "stream1".

This example demonstrates using the callServer API to invoke a method on the Application Adapter of the target app. The callServer method returns a Promise-like object that can additional deliver return data from the server.

Example Code

• index.html
• index.js

Calling the server

The switchStreams server call requires two pieces of data:

• path to the live stream. This includes the context path and stream name, e.g., "live/stream1".
• isImmediate -- if true, the audio will switch immediately and the original stream's video will freeze, and the video will switch to the new stream at the next keyframe. If false, the original continues uninterrupted until a new keyframe is received on the new stream, at which point audio and video switch simultaneously.

The server call then contains a JSON array with a single entry containing these two parameters:

targetSubscriber.callServer('switchStreams', [
  {
    path: streamPath.value,
    isImmediate: true,
  },
])

The server responds with a message:

{
  "data": {
    "type": "result",
    "message": "Stream switch: Success"
  }
}