Cross-channel subscription

By default, only users in the same room can communicate through audio and video streams. Different rooms are isolated from each other. Cross-channel subscription allows communication between rooms for scenarios such as co-streaming.

How it works

When Streamer A1 subscribes to the stream of Streamer B1 in Room B, if Room B or Streamer B1 does not exist, A1 waits until the app cancels the subscription. This simplifies the processing logic.

Sample code

Subscribe to audio and video streams across channels

Sample code for Android:

/* Subscribe to the camera stream and audio stream of B1 in Room B. */
mAliRtcEngine.subscribeRemoteDestChannelStream("B","B1",AliRtcVideoTrack.AliRtcVideoTrackCamera,true,true);

Sample code for iOS:

/* Subscribe to the camera stream and audio stream of B1 in Room B. */
[self.engine subscribeRemoteDestChannelStream:@"B" uid:@"B1" track:AliRtcVideoTrackCamera subAudio:YES sub:YES];

Sample code for Windows:

/* Subscribe to the camera stream and audio stream of B1 in Room B. */
mAliRtcEngine->SubscribeRemoteDestChannelStream("B","B1",AliEngineVideoTrackCamera,true,true);

Cancel cross-channel subscription to audio and video streams

Sample code for Android:

/* Unsubscribe from the camera stream and audio stream of B1 in Room B. */
mAliRtcEngine.subscribeRemoteDestChannelStream("B","B1",AliRtcVideoTrack.AliRtcVideoTrackNo,false,false);

Sample code for iOS:

/* Unsubscribe from the camera stream and audio stream of B1 in Room B. */
[self.engine subscribeRemoteDestChannelStream:@"B" uid:@"B1" track:AliRtcVideoTrackNo subAudio:NO sub:NO];

Sample code for Windows:

/* Unsubscribe from the camera stream and audio stream of B1 in Room B. */
mAliRtcEngine->SubscribeRemoteDestChannelStream("B","B1",AliEngineVideoTrackCamera,false,false);