WebRTC iOS: remote video is not shown in iOS client

user_5907289 0
Viewed 4528

I am trying to implement WebRTC in an iOS application using GoogleWebRTC pod. i can place a video call between iOS app and a web client, in which case the audio/video works just fine. however when i place a video call between two iOS devices there is no video(audio works). i've checked if there is remote stream and there is.

let localStream = connectionFactory?.mediaStream(withStreamId: "StreamID")
let audioTrack = connectionFactory?.audioTrack(withTrackId: "AudioTrackID")
let videoSource = connectionFactory?.avFoundationVideoSource(with: mediaConstraint)
let videoTrack = connectionFactory?.videoTrack(with: videoSource!, trackId: "VideoTrackID")
localStream?.addAudioTrack(audioTrack!)
localStream?.addVideoTrack(videoTrack!)
peerConnection?.add(localStream!)
webrtc swift ios
4 Answers
user_12698230

As my understanding, you can add a remote video track when first create your local video track, then video track will auto produce frames when it is receiving from peer connection, an example code from WebRTC iOS client: 

- (void)createMediaSenders {
    RTCMediaConstraints *constraints = [self defaultMediaAudioConstraints];
    RTCAudioSource *source = [_factory audioSourceWithConstraints:constraints];
    if (_isAudioEnabled) {
        RTCAudioTrack *track = [_factory audioTrackWithSource:source trackId:kDSAudioTrackId];
        [_peerConnection addTrack:track streamIds:@[ kDSMediaStreamId ]];
    }
    if (_isVideoEnabled) {
        _localVideoTrack = [self createLocalVideoTrack];
        if (_localVideoTrack) {
            [_peerConnection addTrack:_localVideoTrack streamIds:@[ kDSMediaStreamId ]];

            // Create remote video track
            RTCVideoTrack *track = (RTCVideoTrack *)([self videoTransceiver].receiver.track);
            [_delegate appRTC:self didReceiveRemoteVideoTrack:track];
        }
    }
}
user_99723550

Found the problem. I was giving a hard coded string as id when creating stream and video track. which when a connection is established becomes the same for both local and remote streams. providing unique strings as ids solves the problem.

user_59072890

in func rtcClient(client : RTCClient, didReceiveRemoteVideoTrack remoteVideoTrack: RTCVideoTrack) perform a selector that will call after 2 sec then in that selector add track to remoteview

user_82239900
Related