Auto Video Degrade/Restore

Sometimes people have bad internet connections but everyone deserves a good meeting.

When the network is too slow to support audio and video conversations together, the 100ms SDK can automatically turn off downloading other peer's videos, which may improve the audio quality and avoid disconnections.

If the network quality improves, the videos will be restored automatically as well.

To turn on subscribe degradation in your room, open the templates in the dashboard and enable it for roles there. Here's more information about templates.

Get Video Degrade Status

You can check if the SDK has stopped downloading a peers' video (video quality has been degraded) using isDegraded property available on all instances of HMSVideoTrack class.

If isDegraded is true, treat it as if the video of the peer is turned off.

Note: If the UI is not changed, when isDegraded property of a video track becomes true, the video tile will appear black.

const isDegraded: boolean = peer.videoTrack.isDegraded;

Video Degrade and Restore Updates

When a peers' video is restored and degraded, the SDK emits HMSUpdateListenerActions.ON_TRACK_UPDATE event with HMSTrackUpdate.TRACK_RESTORED and HMSTrackUpdate.TRACK_DEGRADED update types respectively.

You can listen to HMSUpdateListenerActions.ON_TRACK_UPDATE event for above mentioned update types and update your layout accordingly -

const onTrackListener = ({
    peer,
    track,
    type
}: {
    peer: HMSPeer,
    track: HMSTrack,
    type: HMSTrackUpdate
}) => {
    if (type === HMSTrackUpdate.TRACK_RESTORED) {
        // {track} of {peer} is restored
        // Now, update your UI to show video of peer again
        console.log(`TRACK_RESTORED: ${track}`);
    }

    if (type === HMSTrackUpdate.TRACK_DEGRADED) {
        // {track} of {peer} is degraded
        // Now, update your UI to hide video of peer, otherwise video tile will appear black
        console.log(`TRACK_DEGRADED: ${track}`);
    }
};

hmsInstance.addEventListener(HMSUpdateListenerActions.ON_TRACK_UPDATE, onTrackListener);