Introduction

The Agora Web SDK provides APIs for you to get the audio and video statistics reflecting the overall quality of a call. The statistics include:

• The last-mile uplink and downlink network conditions of the users.
• The statistics of the call.
• The statistics of the local audio and video tracks.
• The statistics of the remote audio and video tracks.
• Exception events in the channel.

Implementation

Before proceeding, ensure that you have read the quickstart guides and implemented basic real-time audio and video functions in your project.

Get the last-mile network quality of the users

Last mile refers to the connection between your local device and the Agora edge servers.

After the local user joins the channel, the SDK triggers the AgoraRTCClient.on("network-quality") callback once every two seconds and provides the uplink and downlink last-mile network conditions of the local user.

You can also call AgoraRTCClient.getRemoteNetworkQuality to get the network quality of all the remote users to whom the local user subscribes.

Quality Rating Table

client.on("network-quality", (stats) => {
    console.log("downlinkNetworkQuality", stats.downlinkNetworkQuality);
    console.log("uplinkNetworkQuality", stats.uplinkNetworkQuality);
});

const remoteNetworkQuality = client.getRemoteNetworkQuality();

Get the statistics of the call

Call AgoraRTCClient.getRTCStats to get the statistics of the call. For the statistics description, see AgoraRTCStats.

const clientStats = client.getRTCStats();

Get the statistics of local tracks

Call AgoraRTCClient.getLocalAudioStats to get the statistics of a local audio track, and call AgoraRTCClient.getLocalVideoStats to get the statistics of a local video track. For the statistics description, see LocalAudioTrackStats and LocalVideoTrackStats.

const localStats = {
  video: client.getLocalVideoStats(),
  audio: client.getLocalAudioStats()
};

Get the statistics of remote tracks

Call AgoraRTCClient.getRemoteAudioStats to get the statistics of a remote audio track, and call AgoraRTCClient.getRemoteVideoStats to get the statistics of a remote video track. For the statistics description, see RemoteAudioTrackStats and RemoteVideoTrackStats. See the following picture for the description of the end2EndDelay, receiveDelay, and transportDelay properties. For the description of other properties, see RemoteAudioTrackStats and RemoteVideoTrackStats.

const remoteTracksStats = {
  video: client.getRemoteVideoStats()[uid],
  audio: client.getRemoteAudioStats()[uid]
};

Reports exception events in the channel

The SDK reports exception events in the channel by triggering the exception callback. Exceptions are not errors, but usually indicate quality issues. This callback also reports recovery from an exception.

• code: The event code.
• msg: The event message.
• uid: The uid of the user who experiences the exception or recovery event.

client.on("exception", function(evt) {
  console.log(evt.code, evt.msg, evt.uid);
})

Each exception event has a corresponding recovery event. See the table below for details.

Considerations

All the above methods must be called after joining the channel.