WebRTC not creating IceCandidates for video

Question

On an Android app I am trying to make a webRTC connection.

When I am the callee I receive enough number of IceCandidates for video and audio from the socket connection. When my IceCandidates are created there are much fewer of them. Approximately 6 of them are created and they are all for audio.

From the log messages I see connection is successful and audio is going both ways and I manage to send my video to the caller as well however I can not receive the caller's video stream. I guess it is related to not being able to create enough IceCandidates to send to socket connection. Any ideas?

Answer 1

Maybe it is not ideal but the following solved my problem.

First of all it is OK to have fewer number of IceCandidate s. During creation of IceCandidate s on my side, sdpMid fields still don't contain video value -i receive both video and audio values for sdpMid key in IceCandidate s from socket connection-.

All I had to do was to touch my views again after the connection is set with the following methods.

I walked through these here and here.

private void updateVideoViews(final boolean remoteVisible) {
    activity.runOnUiThread(() -> {
        ViewGroup.LayoutParams params = localVideoView.getLayoutParams();
        ViewGroup.LayoutParams params2 = remoteVideoView.getLayoutParams();
        if (remoteVisible) {
            params.height = dpToPx(100);
            params.width = dpToPx(100);

            params2.height = dpToPx(100);
            params2.width = dpToPx(100);
        } else {
            params = new FrameLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT);
            params2 = new FrameLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT);
        }
        localVideoView.setLayoutParams(params);
        remoteVideoView.setLayoutParams(params2);
    });
}

public int dpToPx(int dp) {
    DisplayMetrics displayMetrics = getResources().getDisplayMetrics();
    return Math.round(dp * (displayMetrics.xdpi / DisplayMetrics.DENSITY_DEFAULT));
}